- Stabilize I/O transfer
By default, the tuning goal imposes a stability requirement on the closed-loop transfer
function from the specified inputs to outputs, in addition to the gain constraint. If
stability is not required or cannot be achieved, select No to remove the stability
requirement. For example, if the gain constraint applies to an unstable open-loop
transfer function, select No.- Enforce goal in frequency range
Limit the enforcement of the tuning goal to a particular frequency band. Specify the
frequency band as a row vector of the form [min,max], expressed in frequency units
of your model. For example, to create a tuning goal that applies only between 1 and
100 rad/s, enter [1,100]. By default, the tuning goal applies at all frequencies for
continuous time, and up to the Nyquist frequency for discrete time.- Adjust for signal amplitude
When this option is set to No, the closed-loop transfer function being constrained is
not scaled for relative signal amplitudes. When the choice of units results in a mix of
small and large signals, using an unscaled transfer function can lead to poor tuning
results. Set the option to Yes to provide the relative amplitudes of the input signals
and output signals of your transfer function.For example, suppose the tuning goal constrains a 2-input, 2-output transfer function.
Suppose further that second input signal to the transfer function tends to be about
100 times greater than the first signal. In that case, select Yes and enter [1,100] in
the Amplitude of input signals text box.Adjusting signal amplitude causes the tuning goal to be evaluated on the scaled
transfer function Do–1T(s)Di, where T(s) is the unscaled transfer function. Do and Di are
diagonal matrices with the Amplitude of output signals and Amplitude of input
signals values on the diagonal, respectively.- Apply goal to
Use this option when tuning multiple models at once, such as an array of models
obtained by linearizing a Simulink model at different operating points or block-
parameter values. By default, active tuning goals are enforced for all models. To
enforce a tuning requirement for a subset of models in an array, select Only Models.
Then, enter the array indices of the models for which the goal is enforced. For
example, suppose you want to apply the tuning goal to the second, third, and fourth
models in a model array. To restrict enforcement of the requirement, enter 2:4 in the
Only Models text box.10 Control System Tuning