Simulink Control Design™ - MathWorks

srcblks = frest.findSources('scdspeed_ctrlloop');

The algorithm begins at the output point and traces back through the Sum block Speed

Output. One input to Speed Output is the subsystem External Disturbance. The

algorithm enters the subsystem, finds the source block labeled Step Disturbance, and

reports that block.

The Sum block Speed Output has another input, which the algorithm traces back into

the referenced model Engine Model. Engine Model contains several subsystems, and

the algorithm traces the signal through these subsystems to identify any time-varying

source blocks present.

For example, the Combustion subsystem includes the From block marked delta that

routes the signal from the Spark Advance source. Because Spark Advance is a

constant source block, however, the algorithm does not report the presence of the block.

The algorithm continues the trace until all possible signal paths contributing to the signal

at each linearization output point are examined.

Alternatives

You can use the Simulink Model Advisor to determine whether time-varying source blocks

exist in the signal path of output linear analysis points in your model. To do so, use the

15 Alphabetical List