D =
Throttle Ang
EngineSpeed 0
Static gain.
The reason for obtaining zero gain is that there is a triggered subsystem (Compression) in
the linearization path and the analytical block-by-block linearization does not support
event-based subsystems. Since PID Tuner uses the same approach to obtain a linear
plant model, *PID Tuner also obtains a plant model with zero gain and rejects it during
the launching process.
To launch the PID Tuner, open the PID block dialog, and click Tune. An information
dialog opens and indicates that the plant model linearized at the initial operating point
has zero gain and cannot be used to design a PID controller.
Design PID Controller Using Estimated Frequency Response