MATLAB DATABASE TOOLBOX RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 88)

3 Simulink 4.1 Release Notes

3-6

Enhanced Engine Model Demos

The top and bottom dead center detection in the engine and enginewc demo

models now use a reset integrator. In previous versions, the models used a

triggered subsystem to detect angular position. This method resulted in

inefficiencies and a slower, less accurate solution. In addition, self-triggering

subsystems are now illegal in Simulink.

Setting Block Sorting Priority on Virtual Subsystems

In Simulink 4.0, it was an error to specify a priority on a virtual subsystem. In

Simulink 4.1, you can specify priorities on virtual subsystems.

Using ~ in Filenames on UNIX

Now all filename fields in Simulink support the mapping of the ~ character in

filenames. For example, in a To File block, you can specify

~/outdir/file.mat.

On most systems, this will expand to

/home/$USER/outdir/file.mat.

Improved Warning About Slow Signals Feeding the Enable Port of an

Enabled Subsystem Containing Fast Blocks

In a multitasking environment, deterministic results cannot be guaranteed if

a slow signal feeds the enable port of an enabled subsystem that contains fast

blocks. In previous versions, Simulink did not issue a warning in some cases

where this may occur.

Flagging Function-Call Subsystem Cycles

In previous versions, Simulink allowed you to build models containing

function-call-cycles, i.e., function-call subsystems that directly or indirectly call

themselves.

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MATLAB DATABASE TOOLBOX RELEASE NOTES Guide de l'utilisateur Page 88