Compensator Design for Helicopter Stabilization

Helicopters are inherently unstable unlike aeroplanes. They are to be stabilized using appropriate feedback loops. A control structure with an inner and an outer loop is best-suited for them. The paper describes a design procedure for such a control scheme aiming at fulfilment of the design specs. The problem has been treated analytically with selfbuilt programmes at first. Then recourse has been made to MATLAB control system window for refinement of the design. Finally SISOTOOL has been used to find out the best possible design configuration under given constraints. The design methodology yields a stable control system which has to be kept operative under flying conditions.