MATLAB REAL-TIME WORKSHOP EMBEDDED CODER - S Manuel d'utilisateur télécharger pdf (Page 72)

Appendix V: Simulink Model

The PID controller described in Appendix IV is easy to build in Simulink. Every

part of the controller is built in a separate subsystem. The coupling subsystem is

an approximate design for the actual coupling used in the car, Figure 1. The

transform subsystem is used to transform the pressure to VCS signal and vice

versa. The subsystem is also used to track quantization and saturation errors. The

Quantisation block in the Transform subsystem uses an S-function that in

Simulink just let the calculated signal VCS through while in the software and

when the code is generated a function call is used instead to return the VCS signal

value after being quantised throughout the main program.

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MATLAB REAL-TIME WORKSHOP EMBEDDED CODER - S Manuel d'utilisateur Page 72