I designed a decentralized controller for multivariable process by allowing the loop interactions and simulink model has been developed. I also evaluated the performance (IAE,ISE,TV) of the system under sequential set point changes in loops. Now I want to analyse the robust stability by using inverse singular value plot. How to obtain the inverse singular value plot from simulink model?
By implementing the whole system in simulink and running it you'll be able to notice your system's behavior .An ideal stable system works properly ( regarding the trajectory following ) under NO disturbance .....by applying a white noise to your system in simulink , you can test the robustness of the system .
help of matlab is really functional in that case
S.R
You had better decide the meaning of "robustness" for your system. In control theory, the wording "robustness" is usually associated with a certain noise (white or colored), external disturbance or incomplete knowledge of the system to be controlled.
You can analyze the stability of your controller explicitly by showing precisely under which conditions the tracking residual between the reference and model output is bounded or asymptotically stable. These conditions include uncertainties in the model as well. You can take a look at the sliding mode controller for example and see how it's performed.
Please refer to this article:
https://www.researchgate.net/publication/318726178_An_Improved_Active_Disturbance_Rejection_Control_for_a_Differential_Drive_Mobile_Robot_with_Mismatched_Disturbances_and_Uncertainties
Conference Paper An Improved Active Disturbance Rejection Control for a Diffe...
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