Vector-Coupled Flight Controller Design Based on Multivariable Backstepping Sliding Mode

Abstract

This study aims to address the issues of the simultaneous control of the angle of attack, sideslip angle, and airspeed of a flight in a vectorial form. A vector controller, with a symmetry structure, is developed to transform the attitude and speed control problem into a space-vector tracking problem. We first establish flight vector-coupled dynamics, i.e., describe velocity and angular-velocity vectors in a body-fixed frame, and then propose a multivariable backstepping sliding mode control algorithm along with nonlinear disturbance observers for the vectorial dynamics. The theoretical analysis ensures that the states of the system can be enforced to reach a small neighborhood of the desired sliding manifold. The results of the numerical simulation illustrate the effectiveness and robustness of the combined vector-control scheme.

Performance Improvement for Fighter Aircraft Using Fuzzy Switching LQI Controller

“…The design of reliable flight control systems is difficult for modern aircrafts because these aircrafts are becoming more complicated. Also, the performance of flight control systems must be very high and the stability of the aircraft has demanded the development of different control systems [2]. In recent years, linear control systems have been developed assuming that flight dynamics are linear timeinvariant about the operation points and the longitudinal dynamics are decoupled from lateral ones.…”