Tracking design for a gust-alleviation control system for aircraft

A tracking capability design is proposed for the gust-alleviation control system for aircraft of D. McLean (Proc. Inst. Elec. Eng., vol.125, p.675-685, July 1978). The mathematical model, a 27th-order linearized model, describes the small perturbation motion of a rigid aircraft about its equilibrium. The system is decoupled into two independent subsystems: a 15th-order model describing the lateral motion and a 12th order model describing the longitudinal motion. The authors deal strictly with the case of longitudinal motion in which the control inputs used are the deflections of elevator and horizontal canards while the output is the normal acceleration measured at a location some meters away from the tip of the nose of the aircraft. Results obtained from two design approaches are analyzed and compared