MATLAB and SIMULINK. MODELING DYNAMIC SYSTEMS by Z. Cooper

Author:Z. Cooper [Cooper, Z.]
Language: eng
Format: azw3
Published: 2018-02-18T05:00:00+00:00

Resolve Rate Transitions

In general, a rate transition exists between two blocks if their sample times differ, that is, if either of their sample-time vector components are different. The exceptions are:

• Blocks that output constant value never have a rate transition with any other rate.

• A continuous sample time (black) and the fastest discrete rate (red) never has a rate transition if you use a fixed-step solver.

• A variable sample time and fixed in minor step do not have a rate transition.

You can resolve rate transitions manually by inserting rate transition blocks and by using two diagnostic tools. For the single-tasking execution mode, the Single task rate transition diagnostic allows you to set the level of Simulink rate transition messages. The Multitask rate transition diagnostic serves the same function for multitasking execution mode. These execution modes directly relate to the type of solver in use: Variable-step solvers are always single-tasking; fixed-step solvers may be explicitly set as single-tasking or multitasking.

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