The Design of a Desensitized Controller - A Sensitivity Function Approach

A desensitized controller, using a quadratic sensitivity function approach, is developed to maintain a desired performance in the presence of process parameter variations. This controller is based on a perturbation sensitivity measure which is a combination of the trajectory sensitivity and the cost sensitivity. The theoretical results are presented and the design procedure is outlined. In an example, the controller is evaluated and the result is compared with that of a cost sensitivity approach and a linear quadratic regulator (LQR) design.