Simulating linear systems with nonuniform time vector

Hello,

I want to simulate a state-space model (A,B,C,D) of the kind generated by the ss command in the Control Toolbox, but with a non-uniformly spaced time vector. The lsim command does not work, since it requires evenly spaced time samples.

Would you be able to suggest a way of generating state- and output values for this case?

Thank you in advance!

Answer 1

[Sam Chak]

Hi @Paolo Rapisarda

I think you can possibly use the 1-D data interpolation technique, interp1() function at certain intervals of the query time points. For example

xq = interp1(t, x, tq, 'cubic')

For more info, please check other methods.

[Paolo Rapisarda]

Excellent idea, thank you very much Sam!