Seyyed Reza Mousavai Frdeh - Technical Expert ( M.S. in Electrical Engineering , AmirKabir University)
Amir Nassirharand - Technical Expert ( Ph.D. in Mechanical Engineering , Oklahoma State University)

A new single range controller design approach for use with nonlinear systems of a general nature is developed. The approach is based on one describing function model of the nonlinear process coupled with the application of the ∞ H control theory. The approach is applicable to nonlinear systems of a general nature without any restrictions on nonlinearity type, number of nonlinear terms, nonlinearity arrangement, or system order. The approach is applied to a nonlinear system of the sort encountered in aerospace, and the results are compared with those obtained by one other alternative method that was previously reported in the open literature.

Nonlinear Control - Describing Function - Single Range - ∞ H Control