Journal of Systems Engineering and Electronics ›› 2010, Vol. 21 ›› Issue (3): 491-495.doi: 10.3969/j.issn.1004-4132.2010.03.021

• CONTROL THEORY AND APPLICATION • Previous Articles     Next Articles

Multi-range controller design for highly nonlinear systems with application to unmanned aerial vehicles

Amir Nassirharand*   

  1. School of Mechanical, Manufacturing & Materials Engineering, University of Nottingham–Malaysia Campus,
    Semenyih 43500, Malaysia
  • Online:2010-06-23 Published:2010-01-03

Abstract:

A new procedure for a design of multi-range controllers for use with highly nonlinear systems is developed. The procedure involves obtaining the describing function models of the nonlinear plant by software followed by designing a controller at nominal conditions. Then, the controller parameters are optimized to yield a satisfactory closed-loop response at all operating regimes. Finally, the performance and stability of the closed-loop system comprised of the designed controller and the nonlinear plant are verified. The procedure and the associated software are applied to a nonlinear control problem of the sort encountered in aerospace, and the results are compared with two other approaches.