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Tunable Low-Pass Filter

This example shows how to create the low-pass filter F = a/(s + a) with one tunable parameter a.

You cannot use ltiblock.tf to represent F, because the numerator and denominator coefficients of an ltiblock.tf block are independent. Instead, construct F using the tunable real parameter object realp.

  1. Create a tunable real parameter.

    a = realp('a',10);   
    

    The realp object a is a tunable parameter with initial value 10.

  2. Use tf to create the tunable filter F:

    F = tf(a,[1 a]);

F is a genss object which has the tunable parameter a in its Blocks property. You can connect F with other tunable or numeric models to create more complex models of control systems. For an example, see Control System with Tunable Components.

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