کنفرانس مهندسی برق ایران

صفحه اصلی / سی امین کنفرانس بین المللی مهندسی برق

Designing a Feedforward Controller Using LMI’s for Disturbance Rejection of Non-Minimum Phase MIMO Systems

نویسندگان :

Saeedreza Tofighi¹ Farshad Merrikh-Bayat² Farhad Bayat³

1- دانشگاه زنجان 2- دانشگاه زنجان 3- دانشگاه زنجان

کلمات کلیدی :

feedforward controller،disturbance rejection،non-minimum phase system،linear matrix inequality،CVX

چکیده :

In this paper, designing a feedforward controller is proposed to improve the disturbance rejection property of the Non-Minimum Phase (NMP) Multi-Input Multi-Output (MIMO) systems. Eliminating the effect of disturbances on NMP systems may cause instability and impose additional costs on controlling the entire system. For this purpose, the unknown variables of the feedforward controller are calculated using LMIs such that the H∞ norm of the transfer function matrix from disturbance to output is minimized. By taking advantage of the frequency sampling technics into account and using the right half plane zeros direction condition proposed for the NMP systems in some iterative algorithms, a new tractable method is constructed to solve the problem. The method uses convex technics and CVX software and could reach satisfactorily optimal results in practical examples.