Version 1.1 (R14SP2+) SimDriveline Software :: SimDriveline Release Notes (SimDriveline™)

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Version 1.1 (R14SP2+) SimDriveline Software

This table summarizes what's new in V1.1 (R14SP2+):

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems	Related Documentation at Web Site
Yes Details below	Yes—Details labeled as Compatibility Considerations, below. See also Summary.	Bug Reports at Web site	No

New features and changes introduced in this version are

Changes to the Driveline Environment Block

The Driveline Environment block has been changed for this release.

The Simulation mode pull-down menu has been removed.
You can linearize a model directly with the linmod command and other MATLAB and Simulink tools. See Documentation Improvements following.
A new option has been added for enabling and specifying a default velocity tolerance for all clutches in the connected driveline. See the block reference page and Changes to the Controllable Friction Clutch Block following.

Compatibility Considerations

Driveline Environment blocks are automatically updated when you open a model created from previous SimDriveline versions.

The new block uses the default clutch velocity tolerance configuration. The automatic default is enabled for all non-overriding clutches if you use a variable-step solver.

Changes to the Controllable Friction Clutch Block

The Controllable Friction Clutch block has been changed for this release. A new option, controlled by two new check boxes, has been added to choose between a default velocity tolerance for all clutches and an override velocity tolerance for individual clutches.

See the block reference page and Changes to the Driveline Environment Block preceding.

Compatibility Considerations

Controllable Friction Clutch blocks are automatically updated when you open a model created from previous SimDriveline versions.

If the previous Velocity tolerance value was the default [], the velocity tolerance value is reset to 1e-3 radians/second. Both new check boxes are selected.
If the previous Velocity tolerance was a numerical value or expression, that value or expression is preserved. Both new check boxes are unselected.

Differential Gear Ratio Redefined

The gear ratio of the Differential block has been redefined. Its value now is twice the old value. The differential angular velocity constraint is now

ω_I = (1/2) · g_D(ω_O1 + ω_O2)

where the leading 1/2 is new.

If you load an old model with Differential blocks, the SimDriveline software warns you of each obsolete block. If you try to run the model without updating, the simulation stops with an error.

Compatibility Considerations

You need to update any old Differential blocks in your model. SimDriveline version 1.1 provides an update script. To update your model drive_model,

Enter drive_update('drive_model') at the command line.
The script updates your blocks, then opens a Save dialog for you to save the updated model under a new name.
The script warns you if you have any Differentials linked to external libraries.
When you run the script on a model, it does not update any linked libraries. You must update each library separately the same way you would update a model.

Caution Once you update a model this way, you cannot recover the old version. If you want to keep it, save the old version under a different name, or save the updated version under a new name.

Efficiency Block Library and Demo

The demos folder toolbox/physmod/drive/drivedemos contains a new block library with driveline efficiency loss blocks and one efficiency demo.

Efficiency Library

The drive_efficiency demo model is a block library. It contains three efficiency blocks (masked subsystems) that model these efficiency-power loss phenomena in driveline systems: