Simulink Control Design™ - MathWorks

Analysis

Point

Description To compute C(s)P(s)

Open-

loop input

Specifies a loop

opening followed by

an input

perturbation.

Specify an open-loop input at the input to the

controller and an output measurement at the output

of the plant.

Open-

loop output

Specifies an output

measurement

followed by a loop

break.

Specify an open-loop output at the output of the plant

and an input perturbation at the input of the

controller.

For some systems, you cannot specify the loop opening at the same location as the
linearization input or output point. For example, to open the outer loop in the following
system, a loop opening point is added to the feedback path using a loop break analysis

point. As a result, only the blue blocks are on the linearization path.

Compute Open-Loop Response 2-