.Modelica.UsersGuide.ReleaseNotes.Version_4_1_0 .Modelica.UsersGuide.ReleaseNotes.Version_4_1_0Version 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.
Short overview:
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):
The following new components have been added to existing libraries:
Modelica.Blocks.Logical |
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| AssertCondition | This block is useful for applying asserts via graphical layer. |
Modelica.Blocks.Math |
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| Exponentiation | Performs general exponentiation. |
| SignalExtrema | This block calculates the min and the max of the input signal u and stores the time at which the last minimum or maximum was reached in the variables t_min and t_max respectively. |
| ContinuousSignalExtrema | This block detects positive and negative peaks of differentiable and non-differentiable input signals without sampling. |
Modelica.Electrical.Analog.Lines |
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| TLine | Lossless transmission line with characteristic impedance Z0 and transmission delay TD. |
Modelica.Electrical.Analog.Sources |
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| LightningImpulse | Block that provides the simplified trajectory of an impulse (like the current of lightnings) as one of two approximation functions. |
| LightningImpulseCurrent | Lightning impulse current using either a double exponential function or a Heidler function |
| LightningImpulseVoltage | Lightning impulse voltage using either a double exponential function or a Heidler function |
| DCPowerSupply | This is a simple model of a DC power supply, as used in laboratories. It can only work in one quadrant. |
Modelica.Electrical.Machines.Utilities |
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| RotationalCoupling | 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. |
Modelica.Electrical.PowerConverters.DCDC |
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| ChopperBuckBoost | This is a bidirectional buck / boost - converter with 2 transistors and 2 freewheeling diodes. |
Modelica.Electrical.QuasiStatic.SinglePhase.Basic |
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| Transformer | Models a quasistatic singlephase transformer using a two-port matrix. |
Modelica.Electrical.QuasiStatic.SinglePhase.Sensors |
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| CurrentRMSSensor | This sensor determines the continuous root mean square (RMS) value of a single-phase current system. |
| VoltageRMSSensor | This sensor determines the continuous root mean square (RMS) value of a single-phase voltage system. |
Modelica.Mechanics.Rotational.Components |
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| Coupling | This is a model of an ideal stiff coupling (face to face). |
Modelica.Mechanics.Rotational.Sources |
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| InverseSpeedDependentTorque | Model of inverse speed-dependent torque. |
Modelica.Mechanics.Translational.Sources |
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| InverseSpeedDependentForce | Model of inverse speed-dependent force. |
Modelica.Units.SI |
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| StoichiometricCoefficient | New SI unit type |
The following existing components have been improved in a backward compatible way:
Modelica.Blocks.Sources |
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| CombiTimeTable | Added support of reading CSV files. |
Modelica.Blocks.Tables |
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| CombiTable1Ds CombiTable1Dv CombiTable2Ds CombiTable2Dv |
Added support of reading CSV files. |
Modelica.Electrical.PowerConverters.DCDC |
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| HBridge | An enhanced distribution of the fire signals avoids a short circuit on the source, and enables an enhanced pwm algorithm. |
| Control.SignalPWM | The reference signal can be chosen between sawtooth and triangle, and the comparison between dutyCycle and reference signal is either applied common or separated for both fire ports. |
Modelica.Mechanics.Rotational.Components |
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| BearingFriction | The table interpolation in tau_pos utilizes the interpolation based on ExternalCombiTable1D. |
| LossyGear | The table interpolation in lossTable utilizes the interpolation based on ExternalCombiTable1D. |
Modelica.Mechanics.Rotational.Sources |
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| EddyCurrentTorque | Enhanced with optional influence of variable excitation. |
Modelica.Mechanics.Translational.Components |
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| SupportFriction | The table interpolation in f_pos utilizes the interpolation based on ExternalCombiTable1D. |
Modelica.Mechanics.Translational.Sources |
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| EddyCurrentForce | Enhanced with optional influence of variable excitation. |
The following existing components have been changed in a non-backward compatible way, even though this is not expected in general to affect models using the library, except in very rare cases:
Modelica.Blocks |
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| Discrete.Sampler Discrete.ZeroOrderHold |
Fixed the start time of ZeroOrderHold and Sampler. Parameter startTime was implemented, but ignored. |
| Continuous.PID | Removed the min attribute of gain in Blocks.Continuous.LimPID |
| Math.ContinuousMean | Simplified the mean formula |
| Routing.Extractor | The block will now trigger an assert if index is out range, unless allowOutOfRange is set. |
| Sources.ContinuousClock | Updated to declare that the output is smooth |
Modelica.Constants |
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| inf small eps |
Definitions changed to make them consistent with commonly accepted ones, see, e.g. Wikipedia. As a consequence, their tool-specific implementations in ModelicaServices may have changed compared to version 4.0.0.Tools may provide a compatibility flag to keep the old values. |
Modelica.Fluid.Vessels |
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| OpenTank | Assertion for empty tank to prevent singular energy balance |
Modelica.Magnetic.FundamentalWave.BaseClasses |
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| Machine | Internal used ports of the optional mechanical housing port and the optional thermal port is made protected |
Modelica.Magnetic.QuasiStatic.FundamentalWave.BaseClasses |
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| Machine | Internal used ports of the optional mechanical housing port and the optional thermal port is made protected |
Modelica.Mechanics.MultiBody |
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| World | The protected parameters ndim, ndim2 and ndim_pointGravity have been removed. |
Modelica.Mechanics.MultiBody.Forces |
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| Spring | Propagation of lifted parameters in Spring's lineForce component made final. |
Modelica.Mechanics.Rotational.Components |
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| Brake Clutch OneWayClutch |
The table interpolation in mu_pos utilizes the interpolation based on ExternalCombiTable1D.The public variable mu0 was changed to a protected final parameter. |
Modelica.Mechanics.Translational.Components |
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| Brake | The table interpolation in mu_pos utilizes the interpolation based on ExternalCombiTable1D.The public variable mu0 was changed to a protected final parameter. |
The following critical errors have been fixed (i.e., errors that can lead to wrong simulation results):
Modelica.Blocks.Tables |
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| CombiTable2Ds CombiTable2Dv |
The derivatives for one-sided extrapolation by constant continuation (i.e., extrapolation=Modelica.Blocks.Types.Extrapolation.HoldLastPoint) returned a constant zero value. This has been corrected. |
Modelica.ComplexBlocks.ComplexMath |
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| TransferFunction | Fixed interpretation of coefficients of complex transfer function |
Modelica.ComplexBlocks.Sources |
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| ComplexRampPhasor | Simplify ComplexRampPhasor. |
Modelica.Electrical.Batteries.Utilities |
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| PulseSeries | Clarified usage of pause between pulses and between pulse series |
Modelica.Electrical.Polyphase.Basic |
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| Resistor Conductor VariableResistor VariableConductor |
Propagate parameter T in Resistor and Conductor |
Modelica.Electrical.PowerConverters.DCAC.Control |
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| SVPWM | Corrected a bug in the equation |
Modelica.Fluid.Dissipation.PressureLoss.General |
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| dp_volumeFlowRate_MFLOW | The function now correctly computes the pressure loss in the linear case, i.e., a = 0 and b > 0. |
Modelica.Fluid.Fittings.GenericResistances |
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| VolumeFlowRate | The model now correctly computes the pressure loss in the linear case, i.e., a = 0 and b > 0. |
Modelica.Magnetic.FluxTubes.Material.HysteresisTableData |
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| M400_50A | The value of parameter sigma has been corrected. |
Modelica.Magnetic.FluxTubes.Shapes.FixedShape |
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| HollowCylinderAxialFlux HollowCylinderRadialFlux |
Usage of parameter alpha (central angle) instead of pi without any choiceUsage of parameter alpha (central angle) instead of pi without any choice |
Modelica.Magnetic.QuasiStatic.FluxTubes.Shapes.FixedShape |
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| HollowCylinderAxialFlux HollowCylinderRadialFlux |
Propagated the angle alpha also in the calculation of A in HollowCylinderRadialFlux |
Modelica.Mechanics.MultiBody.Frames.Quaternions |
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| from_T | The calculation was not stable. This has been corrected. |
Modelica.Mechanics.MultiBody.Sensors.Internal |
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| BasicAbsoluteAngularVelocity | Corrected the error with frame_resolve math in BasicAbsoluteAngularVelocity sensor |
Modelica.Fluid.Fittings.BaseClasses.QuadraticTurbulent.LossFactorData |
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| sharpEdgedOrifice | Bug in SharpEdgedOrifice for Loss factors resolved |
Modelica.Fluid.Utilities |
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| regFun3 | The function produced wrong results in horizontal wall friction models. This is fixed. |
Modelica.Media.Air.MoistAir.Utilities |
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| spliceFunction spliceFunction_der |
Refactor spliceFunction_der |
Modelica.Media.Air.ReferenceMoistAir.Utilities |
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| pd_pTX_der | Corrected the error in the function for computation of partial pressure derivative of steam |
Modelica.Media.R134a.R134a_ph |
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| dofpT | Changed code to ensure convergence to correct values throughout the entire p,T validity range |
Modelica.Math |
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| isPowerOf2 | Corrected the issue of wrong results for large inputs |
The following models were declared as obsolete, thus to be preferably replaced with better, more general ones:
Modelica.Electrical.Analog.Lines |
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| TLine1 TLine2 Tline3 |
Replaced by generic Tline model with appropriate parametrization. |