Abstract
In earlier paper the authors proposed a method to design a robust flight control system by using continuous Utmost Compensator.
The method is applied to design a control augumentation system (CAS) for the longitudinal flight control system of a typical small aircraft.
In this paper, a new method is proposed to design a robust flight control system using discrete time Utmost Compensator with appropriate sampling interval.
The above sampling interval is determined by the following procedure.
(1) Determine the primary strip which contains all eigen values of rigid body motion in S-plane.
(2) Determine a sampling interval to reflect the bandwidth to be robust stable in the bandwidth to be low-sensitive by aliasing effect.
By choosing the above appropriate sampling interval, the problem to design a low-sensitive and robust stable control system can be transformed to a simple problem to design a low-sensitive control system.
