| Version 2.1 (R2008a) Simscape™ Software Release Notes | |
This table summarizes what's new in Version 2.1 (R2008a):
| New Features and Changes | Version Compatibility Considerations | Fixed Bugs and Known Problems | Related Documentation at Web Site |
|---|---|---|---|
| Yes Details below | No | Bug
Reports | No |
New features and changes introduced in this version are
Finding and managing operating points by trimming has been implemented for models that include Simscape and SimHydraulics® blocks. Simulink® Control Design™ product is required for using this functionality. For more information, see Trimming Simscape Models in the Simscape documentation.
You can now specify temperature for your thermal models in a variety of units, including degrees Celsius, Fahrenheit, and Rankine. The unit manager automatically handles conversions between thermal units.
Thermal units sometimes require an affine conversion, that is, a conversion that performs both multiplication and addition. In situations when you deal with a relative, rather than absolute, temperature, you need to convert using just the linear term. Thermodynamic variables in block dialogs are automatically tagged as appropriate and handled by the unit manager. However, when an input or output signal is related to thermodynamic variables and contains units of temperature, you must decide whether affine conversion needs to be applied. The Simulink-PS Converter and PS-Simulink Converter block dialogs now contain the Apply affine conversion checkbox. If you select it, the unit manager uses the affine conversion, otherwise it applies the default linear conversion.
For more information, see Thermal Unit Conversions in the Simscape documentation, as well as the Simulink-PS Converter and PS-Simulink Converter block reference pages.
The pm_addunit command has also been modified to support affine conversions. Its second argument, conversion, may now be either a positive real scalar or a 1x2 array. If this argument has two elements, then it is specifying an affine conversion, with the first element (a positive real number) being the linear conversion coefficient, and the second being the offset.
Simscape block dialogs have drop-down combo boxes for units next to a parameter value. You can either select a unit from the drop-down list, or type a commensurate unit name (or a mathematical expression with unit names) directly into the units combo box of the block dialog. For more information, see Specifying Units in Block Dialogs in the Simscape documentation.
Similarly, the Simulink-PS Converter and PS-Simulink Converter block dialogs now contain a drop-down list, which is prepopulated with some common input or output units. You can either select a unit from the list or type a unit name, or a mathematical expression with unit names. Note that you must still match the unit type:
For a PS-Simulink Converter block, these units must be commensurate with the units of the input physical signal coming into the block.
Signal units that you specify in a Simulink-PS Converter block must match the input type expected by the Simscape block connected to it.
Version 2.1 contains two new blocks:
Gyrator block in the Electrical Elements library simulates an ideal gyrator, which can be used to implement an inductor with a capacitor.
PS Abs block in the Physical Signals library returns absolute value of input signal.
Version 2.1 contains multiple enhancements to simulation algorithms, resulting in improved robustness and reliability.
R2008a introduces "What's This?" context-sensitive help for parameters that appear in the Simulink Configuration Parameters dialog, including those on the Simscape pane. This feature provides quick access to a detailed description of the parameters, saving you the time it would take to find the information in the Help Browser.
To use the "What's This?" help, do the following:
Place your cursor over the label of a parameter.
Right-click. A What's This? context menu appears.
For example, the following figure shows the What's This? context menu appearing after a right-click on the Start time parameter in the Solver pane.
Click What's This?. A context-sensitive help window appears showing a description of the parameter.
The following demo has been added in Version 2.1:
Demo Name | Description |
House Heating System | The demo represents a simple house heating system consisting of a heater, thermostat, and a house structure with four thermally distinguishable parts: inside air, house walls, windows, and roof. You can investigate system behavior with the heating system turned on or off, and plot the heat cost and indoor versus outdoor temperatures. |
| Version 3.0 (R2008b) Simscape Software | Version 2.0 (R2007b) Simscape Software | |
| © 1984-2008- The MathWorks, Inc. - Site Help - Patents - Trademarks - Privacy Policy - Preventing Piracy - RSS |