Simulink Control Design™ - MathWorks

(Tuis.) #1

Loop Shape Goal


Purpose


Shape open-loop response of feedback loops when using Control System Tuner.

Description


Loop Shape Goal specifies a target gain profile (gain as a function of frequency) of an
open-loop response. Loop Shape Goal constrains the open-loop, point-to-point response
(L) at a specified location in your control system.

When you tune a control system, the target open-loop gain profile is converted into
constraints on the inverse sensitivity function inv(S) = (I + L) and the complementary
sensitivity function T = 1–S. These constraints are illustrated for a representative tuned
system in the following figure.

10 Control System Tuning

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