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within Modelica.UsersGuide;
package ReleaseNotes "Release notes"
extends Modelica.Icons.ReleaseNotes;
class VersionManagement "Version Management"
extends Modelica.Icons.ReleaseNotes;
annotation (Documentation(info="<html>
<h4>Development branches</h4>
<p>
Further development and maintenance of the Modelica Standard Library is performed with
two branches on the public <a href=\"https://github.com/modelica/ModelicaStandardLibrary.git\">GitHub repository</a> of the Modelica Association.
</p>
<p>
Since version 4.0.0 the Modelica Standard Library uses semantic versioning following the
convention:
</p>
<blockquote><strong><code>MAJOR.MINOR.BUGFIX</code></strong></blockquote>
<p>
This provides a mechanism for maintaining releases and bug-fixes in a well defined way and is inspired
by (but not identical to) <a href=\"https://semver.org\">https://semver.org</a>.
</p>
<h5>Main development branch</h5>
<p>
Name: \"master\"
</p>
<p>
This branch contains the actual development version, i.e., all bug-fixes
and new features.
New features must have been tested before including them.
However, the exhaustive tests for a new version are (usually) not performed.
This version is usually only be used by the developers of the
Modelica Standard Library and is not utilized by Modelica users.
</p>
<h5>Maintenance branch</h5>
<p>
Name: \"maint/4.1.x\"
</p>
<p>
This branch contains the released Modelica Standard Library version (e.g., v4.1.0)
where all bug-fixes since this release date are included
(also consecutive <code>BUGFIX</code> versions 4.1.1, 4.1.2, etc.,
up to when a new <code>MINOR</code> or <code>MAJOR</code> release becomes available;
i.e., there will not be any further <code>BUGFIX</code> versions (i.e., 4.1.x) of a previous release).
These bug-fixes might not yet be tested with all test cases or with
other Modelica libraries. The goal is that a vendor may take this version at
any time for a new release of its software, in order to incorporate the latest
bug fixes.
</p>
<h4>Contribution workflow</h4>
<p>
The general <a href=\"https://guides.github.com/activities/forking/\">contribution workflow</a> is usually as follows:
</p>
<ol>
<li>Fork the repository to your account by
<a href=\"https://help.github.com/articles/fork-a-repo/\">using the Fork button</a> of the GitHub repository site.</li>
<li>Clone the forked repository to your computer. Make sure to checkout the maintenance branch if the bug fix is going to get merged to the maintenance branch.</li>
<li>Create a new topic branch and give it a meaningful name, like, e.g., \"issue2161-fix-formula\".</li>
<li>Do your code changes and commit them, one change per commit.<br>
Single commits can be copied to other branches.<br>
Multiple commits can be squashed into one, but splitting is difficult.</li>
<li>Once you are done, push your topic branch to your forked repository.</li>
<li>Go to the upstream <a href=\"https://github.com/modelica/ModelicaStandardLibrary.git\">https://github.com/modelica/ModelicaStandardLibrary.git</a> repository and submit a <a href=\"https://help.github.com/articles/about-pull-requests/\">Pull Request</a> (PR).
<ul>
<li>If the PR is related to a certain issue, reference it by its number like this: #2161.</li>
<li>Once a pull request is opened, you can discuss and <a href=\"https://help.github.com/articles/about-pull-request-reviews/\">review</a> the potential changes with collaborators and add follow-up commits before the changes are merged into the repository.</li>
<li>If you have not already signed the Modelica Association Contributor License Agreement (CLA) you need to do so one-time.<br>
You can sign the CLA electronically using the CLA Assistant service and your GitHub account. There is no need to scan and send any documents by mail.</li>
</ul></li>
<li>Update your branch with the requested changes. If necessary, merge the latest
\"master\" branch into your topic branch and solve all merge conflicts in your topic branch.</li>
</ol>
<p>
There are some special guidelines for changes to the maintenance branch.
</p>
<ul>
<li> Every change to the maintenance branch has to get cherry-picked at the \"master\"
branch (see above), too.</li>
<li> When a new <code>BUGFIX</code> release is due the annotations
\"version\" and \"versionDate\" need to be updated.<br>
Example:
<blockquote><pre>
annotation(version = \"4.0.1\",
versionDate = \"2020-09-29\",
dateModified = \"2020-09-29 07:40:19Z\",
revisionId = \"$F​ormat:%h %ci$\")
</pre></blockquote>
The \"dateModfied\" is optional but might help identify the exact creation time of a release.
The \"revisionId\" field is a special annotation to identify the exact commit that the released
version represents.<br>
Example:
<blockquote>
Running the export command \"<code>git archive -o msl.zip v4.0.0</code>\" will
expand the above \"revisionId\" place holder to something like:
<blockquote><pre>revisionId = \"c04e23a0d 2020-04-01 12:00:00 +0200$\"</pre></blockquote>
</blockquote>
</li>
</ul>
<p>
As a recommendation, a valid bug-fix to the maintenance branch may contain one or
more of the following changes.
</p>
<ul>
<li> Correcting an equation.</li>
<li> Correcting attributes quantity/unit/displayUnit in a declaration.</li>
<li> Improving/fixing the documentation.</li>
<li> Introducing a new name in the public section of a class
(model, package, ...) or in any section of a partial class is <strong>not</strong> allowed.
Since otherwise, a user might use this new name and when storing its model
and loading it with an older bug-fix version, an error would occur.</li>
<li> Introducing a new name in the protected section of a non-partial
class should only be done if absolutely necessary to fix a bug.
The problem is that this might be non-backward compatible,
because a user might already extend from this class and already using the same name.</li>
<li> The changes should not significantly degrade performance.</li>
</ul>
<p>
As a recommendation, a minor version may in addition contain one or more of the following changes.
</p>
<ul>
<li> Add new classes (in partial packages this may break backwards compatibility, so in those cases only when necessary).</li>
<li> Modify Examples (including renaming).</li>
<li> Improve/fix the documentation.</li>
<li> Add new names in the public section of a class (or in any section of a partial class), even if it may break backwards compatibility, but should satisfy:
<ul>
<li>Any new input connector, or connector with annotation <code>mustBeConnected</code> must be conditional and as default not enabled.</li>
<li>Any new parameter must have a default value.</li>
<li>Any new function input must be after existing inputs and have a default value.</li>
<li>Any new function output must be after existing outputs.</li>
<li>Any new enumeration member must be after existing ones.</li>
<li>Any new record members should be after existing ones, and have a default value (needed if there are any record constructor calls).</li>
</ul>
</li>
<li> Delete/rename names in the protected section of a non-partial class if unlikely to be used.</li>
<li> Change visibility from public to protected if unlikely to be used.</li>
<li> The changes should not significantly degrade performance.</li>
</ul>
<p>
Note that many of these changes may break backwards compatibility in very rare cases.
</p>
<p>
The user perspective is that user can rely on this library to be backwards compatible for bug fix versions and practically backwards compatible for minor versions.
Additionally, they can rely on new major versions providing conversion scripts.
<strong>Provided</strong> you don't rely on any of the following:
</p>
<ul>
<li> Models that are marked as Example or documentation models.
You can use them for inspiration and copy the Example, but directly using Example models in user models should be avoided.</li>
<li> Extending a non-partial class with named elements (either directly or indirectly by using multiple inheritance).</li>
<li> Unqualified import from the library.</li>
<li> Clear bugs in the library.</li>
<li> Equivalence between a copy of record or enumeration class and the one in the standard library. </li>
</ul>
</html>"));
end VersionManagement;
class Version_4_2_0 "Version 4.2.0 (mmm dd, yyyy)"
extends Modelica.Icons.ReleaseNotes;
annotation (Documentation(info="<html>
<p>Version 4.2.0 is backward compatible to version 4.1.0. This means, there is no need to convert user models, because no renaming or moving has been done on the library.</p>
<p>Short overview:</p>
<ul>
<li>xx new components (e.g. Blocks for recording of min and max of a signal)</li>
<li>xx improved components (e.g. tables can now read CSV)</li>
<li>xx potentially non-backwards-compatible changes (especially Constants.inf, Constants.small, Constants.eps)</li>
<li>xx bug fixes, which may cause the simulation results to change for the better</li>
<li>xx models marked as obsolete</li>
<li>This version is based on the recent Modelica language standard version 3.6.</li>
<li>About [Link to resolved] issues xxx issues (including xxx pull requests) have been addressed for this release.</li>
</ul>
<p>
The following libraries, that were previously using version Modelica 4.0.0, were tested successfully with version 4.1.0 without any modification, using Dymola 2025x Refresh 1 and/or OpenModelica 1.25.0
(alphabetical list):
</p>
<p><br>The following <strong><font color=\"blue\">new components</font></strong> have been added to <strong><font color=\"blue\">existing</font></strong> libraries: </p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\">
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Analog.Ideal</h4></td>
</tr>
<tr>
<td>OpAmpLimited</td>
<td>Replaces the deprecated IdealizedOpAmpLimited which caused numerical problems.</td>
</tr>
</table>
<p><br><br>The following <strong><font color=\"blue\">existing components</font></strong> have been <strong><font color=\"blue\">improved</font></strong> in a <strong><font color=\"blue\">backward compatible</font></strong> way:</p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\">
<tr>
<td colspan=\"2\"><h4>Library</h4></td>
</tr>
<tr>
<td>Component(s)</td>
<td>Description.</td>
</tr>
</table>
<p><br><br>The following <strong><font color=\"blue\">existing components</font></strong> have been <strong><font color=\"blue\">changed</font></strong> in a <strong><font color=\"blue\">non-backward compatible</font></strong> way, even though this is not expected in general to affect models using the library, except in very rare cases:</p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\">
<tr>
<td colspan=\"2\"><h4>Library</h4></td>
</tr>
<tr>
<td>Component(s)</td>
<td>Description.</td>
</tr>
</table>
<p><br><br>The following <strong><font color=\"blue\">critical errors</font></strong> have been fixed (i.e., errors that can lead to wrong simulation results): </p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\">
<tr>
<td colspan=\"2\"><h4>Library</h4></td>
</tr>
<tr>
<td>Component(s)</td>
<td>Description.</td>
</tr>
</table>
<p><br><br>The following models were declared as <strong><font color=\"blue\">obsolete</font></strong>, thus to be preferably replaced with better, more general ones:</p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\">
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Analog.Ideal</h4></td>
</tr>
<tr>
<td>IdealizedOpAmpLimited</td>
<td>Replaced by OpAmpLimited.</td>
</tr>
</table>
</html>"));
end Version_4_2_0;
class Version_4_1_0 "Version 4.1.0 (May 23, 2025)"
extends Modelica.Icons.ReleaseNotes;
annotation (Documentation(info="<html>
<p>Version 4.1.0 is backward compatible to version 4.0.0. This means, there is no need to convert user models, because no renaming or moving has been done on the library. Please note: simulation results might be affected by necessary changes and bug fixes that were applied since the 4.0.0 release, see below for more details.</p>
<p>Short overview:</p>
<ul>
<li>17 new components (e.g. Blocks for recording of min and max of a signal)</li>
<li>12 improved components (e.g. tables can now read CSV)</li>
<li>18 potentially non-backwards-compatible changes (especially Constants.inf, Constants.small, Constants.eps)</li>
<li>26 bug fixes, which may cause the simulation results to change for the better</li>
<li>3 models marked as obsolete</li>
<li>This version is based on the recent Modelica language standard version 3.6.</li>
<li>About <a href=\"modelica://Modelica/Resources/Documentation/Version-4.1.0/ResolvedGitHubIssues.html\">560 issues (including 392 pull requests)</a> have been addressed for this release.</li>
</ul>
<p>
The following libraries, that were previously using version Modelica 4.0.0, were tested successfully with version 4.1.0 without any modification, using Dymola 2025x Refresh 1 and/or OpenModelica 1.25.0
(alphabetical list):
</p>
<ul>
<li>AviationSystems 1.6.2</li>
<li>AviationSystems_Demos 1.6.2</li>
<li>Battery 2.8.1</li>
<li>BrushlessDCDrives 1.4.3</li>
<li>Buildings 12.0.0 (LBL)</li>
<li>CATIAMultiBody 2.0 (DS)</li>
<li>ClaRa/ClaRaPlus 1.7.5 (TLK-Thermo)</li>
<li>Claytex 2024.2</li>
<li>ClaytexFluid 2024.2</li>
<li>Cooling 1.5.4</li>
<li>DassaultSystemes 1.14.0</li>
<li>DriveControl</li>
<li>DymolaModels 1.10.0</li>
<li>ElectricPowerSystems 1.7.0</li>
<li>ElectrifiedPowertrains 1.11.0</li>
<li>EMOTH</li>
<li>Engines 2024.2</li>
<li>FlexibleBodies 2.4.0</li>
<li>FluidDynamicsLib 2.18.0 (XRG)</li>
<li>FluidPower 2024.2</li>
<li>FTire 1.3.2</li>
<li>Hydrogen 1.4.2</li>
<li>Modelica_StateGraph2 2.1.0</li>
<li>Modelica_DeviceDrivers 2.1</li>
<li>FlightDynamics 1.0.4</li>
<li>HanserModelica</li>
<li>HumanComfortLib 2.18.0 (XRG)</li>
<li>PhotoVoltaics</li>
<li>PhotoVoltaics_TGM</li>
<li>PlanarMechanics 1.6.0 (DLR)</li>
<li>PneumaticSystems 1.7.2</li>
<li>SDF 0.4.5</li>
<li>TestingLib 1.10.0</li>
<li>ThermalManagementDemos 1.2.1</li>
<li>ThermodynamicsConnector 1.3.0</li>
<li>ThermofluidStream 1.2.0 (DLR)</li>
<li>TIL/TILMedia 2024.1 (TLK-Thermo)</li>
<li>VehicleInterfaces 2.0.1 </li>
<li>VehicleDemos 2024.2</li>
<li>VeSyMA 2024.2</li>
<li>VeSyMA2EPTL 2024.2</li>
<li>Visa2Base 1.17</li>
<li>Visa2Paper 1.17</li>
<li>Visa2Steam 1.17</li>
<li>WindPower 1.1.5</li>
</ul>
<p><br>The following <strong><font color=\"blue\">new components</font></strong> have been added to <strong><font color=\"blue\">existing</font></strong> libraries: </p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\"><tr>
<td colspan=\"2\"><h4>Modelica.Blocks.Logical</h4></td>
</tr>
<tr>
<td>AssertCondition</td>
<td>This block is useful for applying asserts via graphical layer.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Blocks.Math</h4></td>
</tr>
<tr>
<td>Exponentiation</td>
<td>Performs general exponentiation.</td>
</tr>
<tr>
<td>SignalExtrema</td>
<td>This block calculates the <code>min</code> and the <code>max</code> of the input signal <code>u</code> and stores the time at which the last minimum or maximum was reached in the variables <code>t_min</code> and <code>t_max</code> respectively. </td>
</tr>
<tr>
<td>ContinuousSignalExtrema</td>
<td>This block detects positive and negative peaks of differentiable and non-differentiable input signals without sampling.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Analog.Lines</h4></td>
</tr>
<tr>
<td>TLine</td>
<td>Lossless transmission line with characteristic impedance <code>Z0</code> and transmission delay <code>TD</code>. </td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Analog.Sources</h4></td>
</tr>
<tr>
<td>LightningImpulse</td>
<td>Block that provides the simplified trajectory of an impulse (like the current of lightnings) as one of two approximation functions.</td>
</tr>
<tr>
<td>LightningImpulseCurrent</td>
<td>Lightning impulse current using either a double exponential function or a Heidler function</td>
</tr>
<tr>
<td>LightningImpulseVoltage</td>
<td>Lightning impulse voltage using either a double exponential function or a Heidler function</td>
</tr>
<tr>
<td>DCPowerSupply</td>
<td>This is a simple model of a DC power supply, as used in laboratories. It can only work in one quadrant. </td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Machines.Utilities</h4></td>
</tr>
<tr>
<td>RotationalCoupling</td>
<td>Ideal stiff coupling: one device connected to the coupling is turning clockwise (looking at the shaft end), the other device connected to the coupling is turning counter-clockwise (looking at the shaft end). The torque at flange_b has the same magnitude as the torque at flange_a but opposite sign.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.PowerConverters.DCDC</h4></td>
</tr>
<tr>
<td>ChopperBuckBoost</td>
<td>This is a bidirectional buck / boost - converter with 2 transistors and 2 freewheeling diodes.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.QuasiStatic.SinglePhase.Basic</h4></td>
</tr>
<tr>
<td>Transformer</td>
<td>Models a quasistatic singlephase transformer using a two-port matrix.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.QuasiStatic.SinglePhase.Sensors</h4></td>
</tr>
<tr>
<td>CurrentRMSSensor</td>
<td>This sensor determines the continuous root mean square (RMS) value of a single-phase current system.</td>
</tr>
<tr>
<td>VoltageRMSSensor</td>
<td>This sensor determines the continuous root mean square (RMS) value of a single-phase voltage system.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Rotational.Components</h4></td>
</tr>
<tr>
<td>Coupling</td>
<td>This is a model of an ideal stiff coupling (face to face).</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Rotational.Sources</h4></td>
</tr>
<tr>
<td>InverseSpeedDependentTorque</td>
<td>Model of inverse speed-dependent torque.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Translational.Sources</h4></td>
</tr>
<tr>
<td>InverseSpeedDependentForce</td>
<td>Model of inverse speed-dependent force.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Units.SI</h4></td>
</tr>
<tr>
<td>StoichiometricCoefficient</td>
<td> New SI unit type </td>
</tr>
</table>
<p><br><br>The following <strong><font color=\"blue\">existing components</font></strong> have been <strong><font color=\"blue\">improved</font></strong> in a <strong><font color=\"blue\">backward compatible</font></strong> way:</p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\"><tr>
<td colspan=\"2\"><h4>Modelica.Blocks.Sources</h4></td>
</tr>
<tr>
<td>CombiTimeTable</td>
<td>Added support of reading CSV files.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Blocks.Tables</h4></td>
</tr>
<tr>
<td>CombiTable1Ds<br>CombiTable1Dv<br>CombiTable2Ds<br>CombiTable2Dv</td>
<td>Added support of reading CSV files.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.PowerConverters.DCDC</h4></td>
</tr>
<tr>
<td>HBridge</td>
<td>An enhanced distribution of the fire signals avoids a short circuit on the source, and enables an enhanced pwm algorithm.</td>
</tr>
<tr>
<td>Control.SignalPWM</td>
<td>The reference signal can be chosen between sawtooth and triangle, and the comparison between <code>dutyCycle</code> and reference signal is either applied common or separated for both fire ports.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Rotational.Components</h4></td>
</tr>
<tr>
<td>BearingFriction</td>
<td>The table interpolation in <code>tau_pos</code> utilizes the interpolation based on <a href=\"Modelica.Blocks.Types.ExternalCombiTable1D\">ExternalCombiTable1D</a>.</td>
</tr>
<tr>
<td>LossyGear</td>
<td>The table interpolation in <code>lossTable</code> utilizes the interpolation based on <a href=\"Modelica.Blocks.Types.ExternalCombiTable1D\">ExternalCombiTable1D</a>.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Rotational.Sources</h4></td>
</tr>
<tr>
<td>EddyCurrentTorque</td>
<td>Enhanced with optional influence of variable excitation.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Translational.Components</h4></td>
</tr>
<tr>
<td>SupportFriction</td>
<td>The table interpolation in <code>f_pos</code> utilizes the interpolation based on <a href=\"Modelica.Blocks.Types.ExternalCombiTable1D\">ExternalCombiTable1D</a>.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Translational.Sources</h4></td>
</tr>
<tr>
<td>EddyCurrentForce</td>
<td>Enhanced with optional influence of variable excitation.</td>
</tr>
</table>
<p><br><br>The following <strong><font color=\"blue\">existing components</font></strong> have been <strong><font color=\"blue\">changed</font></strong> in a <strong><font color=\"blue\">non-backward compatible</font></strong> way, even though this is not expected in general to affect models using the library, except in very rare cases:</p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\">
<tr>
<td colspan=\"2\"><h4>Modelica.Blocks</h4></td>
</tr>
<tr>
<td>Discrete.Sampler<br>Discrete.ZeroOrderHold</td>
<td>Fixed the start time of <code>ZeroOrderHold</code> and <code>Sampler</code>. Parameter <code>startTime</code> was implemented, but ignored.</td>
</tr>
<tr>
<td>Continuous.PID</td>
<td>Removed the <code>min</code> attribute of gain in Blocks.Continuous.LimPID</td>
</tr>
<tr>
<td>Math.ContinuousMean</td>
<td>Simplified the mean formula</td>
</tr>
<tr>
<td>Routing.Extractor</td>
<td>The block will now trigger an assert if <code>index</code> is out range, unless <code>allowOutOfRange</code> is set.</td>
</tr>
<tr>
<td>Sources.ContinuousClock</td>
<td>Updated to declare that the output is smooth</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Constants</h4></td>
</tr>
<tr>
<td>inf<br>small<br>eps</td>
<td>Definitions changed to make them consistent with commonly accepted ones, see, e.g. <a href=\"https://en.wikipedia.org/wiki/Machine_epsilon\">Wikipedia</a>. As a consequence, their tool-specific implementations in <code>ModelicaServices</code> may have changed compared to version 4.0.0.<br>Tools may provide a compatibility flag to keep the old values.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Fluid.Vessels</h4></td>
</tr>
<tr>
<td>OpenTank</td>
<td>Assertion for empty tank to prevent singular energy balance</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Magnetic.FundamentalWave.BaseClasses</h4></td>
</tr>
<tr>
<td>Machine</td>
<td>Internal used ports of the optional mechanical housing port and the optional thermal port is made <code>protected</code></td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Magnetic.QuasiStatic.FundamentalWave.BaseClasses</h4></td>
</tr>
<tr>
<td>Machine</td>
<td>Internal used ports of the optional mechanical housing port and the optional thermal port is made <code>protected</code></td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.MultiBody</h4></td>
</tr>
<tr>
<td>World</td>
<td>The protected parameters <code>ndim</code>, <code>ndim2</code> and <code>ndim_pointGravity</code> have been removed.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.MultiBody.Forces</h4></td>
</tr>
<tr>
<td>Spring</td>
<td>Propagation of lifted parameters in Spring's lineForce component made final.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Rotational.Components</h4></td>
</tr>
<tr>
<td>Brake<br>Clutch<br>OneWayClutch</td>
<td>The table interpolation in <code>mu_pos</code> utilizes the interpolation based on <a href=\"Modelica.Blocks.Types.ExternalCombiTable1D\">ExternalCombiTable1D</a>.<br>The public variable <code>mu0</code> was changed to a <code>protected final</code> parameter.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.Translational.Components</h4></td>
</tr>
<tr>
<td>Brake</td>
<td>The table interpolation in <code>mu_pos</code> utilizes the interpolation based on <a href=\"Modelica.Blocks.Types.ExternalCombiTable1D\">ExternalCombiTable1D</a>.<br>The public variable <code>mu0</code> was changed to a <code>protected final</code> parameter.</td>
</tr>
</table>
<p><br><br>The following <strong><font color=\"blue\">critical errors</font></strong> have been fixed (i.e., errors that can lead to wrong simulation results): </p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\"><tr>
<td colspan=\"2\"><h4>Modelica.Blocks.Tables</h4></td>
</tr>
<tr>
<td>CombiTable2Ds<br>CombiTable2Dv</td>
<td>The derivatives for one-sided extrapolation by constant continuation (i.e., extrapolation=<code>Modelica.Blocks.Types.Extrapolation.HoldLastPoint</code>) returned a constant zero value. This has been corrected.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.ComplexBlocks.ComplexMath</h4></td>
</tr>
<tr>
<td>TransferFunction</td>
<td>Fixed interpretation of coefficients of complex transfer function</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.ComplexBlocks.Sources</h4></td>
</tr>
<tr>
<td>ComplexRampPhasor</td>
<td>Simplify ComplexRampPhasor.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Batteries.Utilities</h4></td>
</tr>
<tr>
<td>PulseSeries</td>
<td>Clarified usage of pause between pulses and between pulse series</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Polyphase.Basic</h4></td>
</tr>
<tr>
<td>Resistor <br>Conductor<br>VariableResistor<br>VariableConductor</td>
<td>Propagate parameter <code>T</code> in <code>Resistor</code> and <code>Conductor</code></td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Electrical.PowerConverters.DCAC.Control</h4></td>
</tr>
<tr>
<td>SVPWM</td>
<td>Corrected a bug in the equation</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Fluid.Dissipation.PressureLoss.General</h4></td>
</tr>
<tr>
<td>dp_volumeFlowRate_MFLOW</td>
<td>The function now correctly computes the pressure loss in the linear case, i.e., <code>a = 0</code> and <code>b > 0</code>.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Fluid.Fittings.GenericResistances</h4></td>
</tr>
<tr>
<td>VolumeFlowRate</td>
<td>The model now correctly computes the pressure loss in the linear case, i.e., <code>a = 0</code> and <code>b > 0</code>.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Magnetic.FluxTubes.Material.HysteresisTableData</h4></td>
</tr>
<tr>
<td>M400_50A</td>
<td>The value of parameter <code>sigma</code> has been corrected.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Magnetic.FluxTubes.Shapes.FixedShape</h4></td>
</tr>
<tr>
<td>HollowCylinderAxialFlux<br>HollowCylinderRadialFlux</td>
<td>Usage of parameter <code>alpha</code> (central angle) instead of pi without any choice<br>Usage of parameter <code>alpha</code> (central angle) instead of pi without any choice</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Magnetic.QuasiStatic.FluxTubes.Shapes.FixedShape</h4></td>
</tr>
<tr>
<td>HollowCylinderAxialFlux<br>HollowCylinderRadialFlux</td>
<td>Propagated the angle <code>alpha</code> also in the calculation of <code>A</code> in <code>HollowCylinderRadialFlux</code></td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.MultiBody.Frames.Quaternions</h4></td>
</tr>
<tr>
<td>from_T</td>
<td>The calculation was not stable. This has been corrected.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Mechanics.MultiBody.Sensors.Internal</h4></td>
</tr>
<tr>
<td>BasicAbsoluteAngularVelocity</td>
<td>Corrected the error with <code>frame_resolve</code> math in <code>BasicAbsoluteAngularVelocity</code> sensor</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.LossFactorData</h4></td>
</tr>
<tr>
<td>sharpEdgedOrifice</td>
<td>Bug in <code>SharpEdgedOrifice</code> for Loss factors resolved</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Fluid.Utilities</h4></td>
</tr>
<tr>
<td>regFun3</td>
<td>The function produced wrong results in horizontal wall friction models. This is fixed.</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Media.Air.MoistAir.Utilities</h4></td>
</tr>
<tr>
<td>spliceFunction<br>spliceFunction_der</td>
<td>Refactor <code>spliceFunction_der</code></td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Media.Air.ReferenceMoistAir.Utilities</h4></td>
</tr>
<tr>
<td>pd_pTX_der</td>
<td>Corrected the error in the function for computation of partial pressure derivative of steam</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Media.R134a.R134a_ph</h4></td>
</tr>
<tr>
<td>dofpT</td>
<td>Changed code to ensure convergence to correct values throughout the entire p,T validity range</td>
</tr>
<tr>
<td colspan=\"2\"><h4>Modelica.Math</h4></td>
</tr>
<tr>
<td>isPowerOf2</td>
<td>Corrected the issue of wrong results for large inputs</td>
</tr>
</table>
<p><br><br>The following models were declared as <strong><font color=\"blue\">obsolete</font></strong>, thus to be preferably replaced with better, more general ones:</p>
<table cellspacing=\"0\" cellpadding=\"2\" border=\"1\"><tr>
<td colspan=\"2\"><h4>Modelica.Electrical.Analog.Lines</h4></td>
</tr>
<tr>
<td>TLine1<br>TLine2<br>Tline3</td>
<td>Replaced by generic <code>Tline</code> model with appropriate parametrization.</td>
</tr>
</table>
</html>"));
end Version_4_1_0;
class Version_4_0_0 "Version 4.0.0 (June 4, 2020)"
extends Modelica.Icons.ReleaseNotes;
annotation (Documentation(info="<html>
<p>
Version 4.0.0 is <strong>not</strong> backward compatible to previous versions.
A tested conversion script is provided to transform models and libraries of previous versions 3.x.y to the new version.
Short Overview:
</p>
<ul>
<li>About <a href=\"modelica://Modelica/Resources/Documentation/Version-4.0.0/ResolvedGitHubIssues.html\">649 issues (including 432 pull requests)</a> have been addressed for this release.</li>
<li>This version is based on the recent Modelica language standard version 3.4.</li>
<li>The library version (i.e., \"4.0.0\") follows semantic versioning using the convention <code>MAJOR.MINOR.BUGFIX</code>
(see <a href=\"modelica://Modelica.UsersGuide.ReleaseNotes.VersionManagement\">Version Management</a> for details)
and was decoupled from the version of the utilized version of the Modelica language standard.</li>
<li>Obsolete classes of previous versions 3.x.y have been replaced.</li>
<li>Obsolete classes, that could not be automatically converted to alternative implementations, have been moved to library ObsoleteModelica4.</li>
<li>Major emphasis was put on improvements of the overall quality with respect to class naming and package structuring, conventions and style guide-lines, icons, documentation style and example models. The following sublibraries have been renamed.
<ol>
<li>Modelica.SIunits → Modelica.Units.{SI, NonSI, Conversions}</li>
<li>Modelica.Electrical.MultiPhase → Modelica.Electrical.Polyphase</li>
<li>Modelica.Electrical.QuasiStationary → Modelica.Electrical.QuasiStatic</li>
</ol></li>
<li>The licenses of the utilized open-source third-party software components as well as the BSD 3-clause license of the Modelica Standard Library itself are available as separate <a href=\"modelica://Modelica/Resources/Licenses\">resources</a>.</li>
</ul>
<p>
The exact difference between package Modelica version 4.0.0 and version 3.2.3 is
summarized in a <a href=\"modelica://Modelica/Resources/Documentation/Version-4.0.0/DifferencesTo323.html\">comparison table</a>.
</p>
<p>
The following <font color=\"blue\"><strong>Modelica packages</strong></font> have been tested that they work together with this release of package Modelica
(alphabetical list).
Hereby simulation results of the listed packages have been produced with package Modelica version 3.2.3 and
compared with the simulation results produced with version 4.0.0 Beta.1. The tests have been performed with Dymola 2020/2020x/2021:
</p>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\">
<tr>
<th>Library</th>
<th>Version</th>
<th>Library provider</th>
</tr>
<tr>
<td><a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1789\">Buildings</a></td>
<td> > 6.0.0</td>
<td>LBNL</td>
</tr>
<tr>
<td>BrushlessDCDrives</td>
<td>1.1.1</td>
<td>Dassault Systèmes</td>
</tr>
<tr>
<td>Clara</td>
<td>1.5.0</td>
<td>XRG Simulation GmbH and TLK-Thermo GmbH</td>
</tr>
<tr>
<td>ClaraPlus</td>
<td>1.3.0</td>
<td>XRG Simulation GmbH and TLK-Thermo GmbH</td>
</tr>
<tr>
<td>DriveControl</td>
<td>4.0.0</td>
<td>Anton Haumer</td>
</tr>
<tr>
<td>DymolaModels</td>
<td>1.1</td>
<td>Dassault Systèmes</td>
</tr>
<tr>
<td>EDrives</td>
<td>1.0.1</td>
<td>Anton Haumer and Christian Kral</td>
</tr>
<tr>
<td>ElectricalMachines</td>
<td>0.9.1</td>
<td>Anton Haumer</td>
</tr>
<tr>
<td>ElectricPowerSystems</td>
<td>1.3.1</td>
<td>Dassault Systèmes</td>
</tr>
<tr>
<td>ElectrifiedPowertrains</td>
<td>1.3.2</td>
<td>Dassault Systèmes</td>
</tr>
<tr>
<td>ElectroMechanicalDrives</td>
<td>2.2.0</td>
<td>Christian Kral</td>
</tr>
<tr>
<td>EMOTH</td>
<td>1.4.1</td>
<td>Anton Haumer</td>
</tr>
<tr>
<td>HanserModelica</td>
<td>1.1.0</td>
<td>Christian Kral</td>
</tr>
<tr>
<td>IBPSA</td>
<td> > 3.0.0</td>
<td>IBPSA Project 1</td>
</tr>
<tr>
<td>KeywordIO</td>
<td>0.9.0</td>
<td>Christian Kral</td>
</tr>
<tr>
<td>Modelica_DeviceDrivers</td>
<td>1.8.1</td>
<td>DLR, ESI ITI, and Linköping University (PELAB)</td>
</tr>
<tr>
<td>Optimization</td>
<td>2.2.4</td>
<td>DLR</td>
</tr>
<tr>
<td>PhotoVoltaics</td>
<td>1.6.0</td>
<td>Christian Kral</td>
</tr>
<tr>
<td>PlanarMechanics</td>
<td>1.4.1</td>
<td>Dirk Zimmer</td>
</tr>
<tr>
<td>Testing</td>
<td>1.3</td>
<td>Dassault Systèmes</td>
</tr>
<tr>
<td>ThermalSystems</td>
<td>1.6.0</td>
<td>TLK-Thermo GmbH</td>
</tr>
<tr>
<td>TIL</td>
<td>3.9.0</td>
<td>TLK-Thermo GmbH</td>
</tr>
<tr>
<td>TILMedia</td>
<td>3.9.0</td>
<td>TLK-Thermo GmbH</td>
</tr>
<tr>
<td>TSMedia</td>
<td>1.6.0</td>
<td>TLK-Thermo GmbH</td>
</tr>
<tr>
<td>VehicleInterfaces</td>
<td>1.2.5</td>
<td>Modelica Association</td>
</tr>
<tr>
<td>WindPowerPlants</td>
<td>1.2.0</td>
<td>Christian Kral</td>
</tr>
</table>
<p><br>
The following <font color=\"blue\"><strong>new libraries</strong></font> have been added:
</p>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\">
<tr><td><a href=\"modelica://Modelica.Clocked\">Modelica.Clocked</a></td>
<td>This library can be used to precisely define and synchronize sampled data systems with different sampling rates.<br>The library previously was
available as separate package <a href=\"https://github.com/modelica/Modelica_Synchronous\">Modelica_Synchronous</a>.
(This library was developed by DLR in close cooperation with Dassault Systèmes Lund.)
</td></tr>
<tr><td><a href=\"modelica://Modelica.Electrical.Batteries\">Modelica.Electrical.Batteries</a></td>
<td>This library offers simple battery models.<br>
(This library was developed by Anton Haumer and Christian Kral.)
</td></tr>
</table>
<p><br>
The following <font color=\"blue\"><strong>new components</strong></font> have been added to <font color=\"blue\"><strong>existing</strong></font> libraries:
</p>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\" style=\"border-collapse:collapse;\">
<tr><td colspan=\"2\"><strong>Modelica.Blocks.Sources</strong></td></tr>
<tr><td>SineVariableFrequencyAndAmplitude<br>CosineVariableFrequencyAndAmplitude</td>
<td>Added signal sources with variable amplitude and frequency; sine and cosine waveforms are provided.</td></tr>
<tr><td>Sinc</td>
<td>Added signal source of <code> amplitude*sin(2*π*f*t)/(2*π*f*t)</code>.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Analog.Sources</strong></td></tr>
<tr><td>SineVoltageVariableFrequencyAndAmplitude<br>CosineVoltageVariableFrequencyAndAmplitude<br>SineCurrentVariableFrequencyAndAmplitude<br>CosineCurrentVariableFrequencyAndAmplitude</td>
<td>Added voltage and current sources with variable amplitude and frequency; sine and cosine waveforms are provided.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Machines.Sensors</strong></td></tr>
<tr><td>SinCosResolver</td>
<td>Added resolver with two sine and two cosine tracks to be used in drive control applications.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Machines.Utilities</strong></td></tr>
<tr><td>SwitchYDwithArc</td>
<td>Added wye delta switch with arc model and time delay between the two switching events.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.PowerConverters</strong></td></tr>
<tr><td>ACAC</td>
<td>Added single-phase and polyphase triac models (AC/AC converters).</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Magnetic.FluxTubes.Shapes.FixedShape</strong></td></tr>
<tr><td>HollowCylinderCircumferentialFlux<br>Toroid</td>
<td>Added circumferential flux models of hollow cylinder and toroid with circular cross section.</td></tr>
<tr><td colspan=\"2\"><strong>Magnetic.QuasiStatic.FluxTubes.Shapes.FixedShape</strong></td></tr>
<tr><td>HollowCylinderCircumferentialFlux<br>Toroid</td>
<td>Added circumferential flux models of hollow cylinder and toroid with circular cross section.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Mechanics.MultiBody.Visualizers.Advanced</strong></td></tr>
<tr><td>Vector</td>
<td>Added 3-dimensional animation for visualization of vector quantities (force, torque, etc.)</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Mechanics.Translational.Components</strong></td></tr>
<tr><td>RollingResistance</td>
<td>Added resistance of a rolling wheel incorporating the inclination and rolling resistance coefficient.</td></tr>
<tr><td>Vehicle</td>
<td>Added simple vehicle model considering mass and inertia, drag and rolling resistance, inclination resistance.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Math</strong></td></tr>
<tr><td>BooleanVectors.andTrue</td>
<td>Similar to <code>allTrue</code>, but return <code>true</code> on empty input vector.</td></tr>
<tr><td>Matrices.LAPACK.dgeqp3</td>
<td>Compute the QR factorization with column pivoting of square or rectangular matrix.</td></tr>
<tr><td>Random.Utilities.automaticLocalSeed</td>
<td>Create an automatic local seed from the instance name.</td></tr>
</table>
<p><br>
The following <font color=\"blue\"><strong>existing components</strong></font> have been <font color=\"blue\"><strong>improved</strong></font> in a <font color=\"blue\"><strong>backward compatible</strong></font> way:
</p>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\" style=\"border-collapse:collapse;\">
<tr><td colspan=\"2\"><strong>Modelica.Blocks.Sources</strong></td></tr>
<tr><td>CombiTimeTable</td>
<td>Added second derivative and modified Akima interpolation.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Blocks.Tables</strong></td></tr>
<tr><td>CombiTable1Ds<br>CombiTable1Dv</td>
<td>Added second derivatives and modified Akima interpolation.</td></tr>
<tr><td>CombiTable2Ds<br>CombiTable2Dv</td>
<td>Added second derivatives.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Analog.Basic</strong></td></tr>
<tr><td>Gyrator</td>
<td>Serves as generalized gyrator model as IdealGyrator was removed.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Analog.Ideal</strong></td></tr>
<tr><td>IdealizedOpAmpLimited</td>
<td>Added homotopy to operational amplifier.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Semiconductors</strong></td></tr>
<tr><td>NPN<br>PNP</td>
<td>Added optional substrate connector.</td></tr>
</table>
<p><br>
The following <font color=\"blue\"><strong>existing components</strong></font> have been <font color=\"blue\"><strong>changed</strong></font> in a <font color=\"blue\"><strong>non-backward compatible</strong></font> way:
</p>
<table border=\"1\" cellspacing=\"0\" cellpadding=\"2\" style=\"border-collapse:collapse;\">
<tr><td colspan=\"2\"><strong>Modelica.Blocks</strong></td></tr>
<tr><td>Nonlinear.Limiter<br>Nonlinear.VariableLimiter</td>
<td>The superfluous parameter <code>limitsAtInit</code> has been removed.</td></tr>
<tr><td>Continuous.PID</td>
<td>The initialization option <code>initType</code> = <code>InitPID.DoNotUse_InitialIntegratorState</code> to only initialize the integrator state has been removed. This option has been converted to both initialize the integrator state and the derivative state, i.e., <code>initType</code> = <code>Init.InitialState</code>.</td></tr>
<tr><td>Continuous.LimPID</td>
<td>The superfluous parameter <code>limitsAtInit</code> has been removed.<br>The initialization option <code>initType</code> = <code>InitPID.DoNotUse_InitialIntegratorState</code> to only initialize the integrator state has been removed. This option has been converted to both initialize the integrator state and the derivative state, i.e., <code>initType</code> = <code>Init.InitialState</code>.</td></tr>
<tr><td>Nonlinear.DeadZone</td>
<td>The superfluous parameter <code>deadZoneAtInit</code> has been removed.</td></tr>
<tr><td>Interfaces.PartialNoise<br>Noise.UniformNoise<br>Noise.NormalNoise<br>Noise.TruncatedNormalNoise<br>Noise.BandLimitedWhiteNoise</td>
<td>As a side-effect of the updated computation in Modelica.Math.Random.Utilities.automaticLocalSeed the <code>localSeed</code> parameter is computed differently if <code>useAutomaticLocalSeed</code> is set to true.</td></tr>
<tr><td>Types.InitPID</td>
<td>The enumeration type has been converted to <code>Types.Init</code> with exception of the alternative <code>InitPID.DoNotUse_InitialIntegratorState</code>, that was converted to <code>Init.InitialState</code> leading to a different initialization behaviour.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Machines.Utilities</strong></td></tr>
<tr><td>SwitchYD</td>
<td>The <a href=\"modelica://Modelica.Electrical.Polyphase.Ideal.IdealCommutingSwitch\">IdealCommutingSwitch</a> is replaced by an <a href=\"modelica://Modelica.Electrical.Polyphase.Ideal.IdealOpeningSwitch\">IdealOpeningSwitch</a> and an <a href=\"modelica://Modelica.Electrical.Polyphase.Ideal.IdealClosingSwitch\">IdealClosingSwitch</a> to allow a time delay between the two switching actions.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Electrical.Spice3</strong></td></tr>
<tr><td>Internal.MOS2<br>Semiconductors.M_NMOS2<br>Semiconductors.M_PMOS2</td>
<td>The final parameter <code>vp</code> has been removed.<br>The obsolete variables <code>cc_obsolete</code>, <code>icqmGB</code>, <code>icqmGS</code>, <code>icqmGD</code>, <code>MOScapgd</code>, <code>MOScapgs</code>, <code>MOScapgb</code>, <code>qm</code> and <code>vDS</code> have been removed.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Magnetic.QuasiStatic.FundamentalWave.Utilities</strong></td></tr>
<tr><td>SwitchYD</td>
<td>The <a href=\"modelica://Modelica.Electrical.QuasiStatic.Polyphase.Ideal.IdealCommutingSwitch\">IdealCommutingSwitch</a> is replaced by an <a href=\"modelica://Modelica.Electrical.QuasiStatic.Polyphase.Ideal.IdealOpeningSwitch\">IdealOpeningSwitch</a> and an <a href=\"modelica://Modelica.Electrical.QuasiStatic.Polyphase.Ideal.IdealClosingSwitch\">IdealClosingSwitch</a> to allow a time delay between the two switching actions.</td></tr>
<tr><td colspan=\"2\"><strong>Modelica.Mechanics.MultiBody.Forces</strong></td></tr>