Simulink Control Design™ - MathWorks

To achieve an accurate linearization, set the model reference block to normal simulation

mode to allow the block-by-block linearization of the referenced model by running the

following command.

set_param('scdspeed_ctrlloop/Engine Model','SimulationMode','Normal')

Notice that the corners of the model block are now white triangles indicating that its

simulation mode is set to normal, as showing in the following figure.

Linearize the model between the speed reference and the speed output and plot the

resulting step response by running:

io(1) = linio('scdspeed_ctrlloop/Speed Reference',1,'input');

io(2) = linio('scdspeed_ctrlloop/Speed Output',1,'output');

sys_normal = linearize(topmdl,io);

step(sys_normal);

2 Linearization