HOSIDF-based Chebyshev Structured Compensator Design for Disturbance Attenuation Problem

Disturbance attenuation problem is considered as an important topic in control literature. This paper deals with the design of HOSIDF (Higher Order Sinusoidal Input Describing Functions) based Chebyshev structured compensator in order to increase the disturbance attenuation performance of the system involving actuator saturation. This study consists of the proposed compensator design in addition to ℋ
_∞
dynamic output feedback controller that already exists in the system. The simulation studies are carried out with an active suspension system which is known as a benchmark problem in control literature. The improvement in disturbance attenuation performance of the closed loop system involving HOSIDF-based compensator is illustrated with time-domain and harmonic plots.