基于Backstepping控制理论的非线性飞控系统和超机动研究

 介绍了一种基于backstepping理论的非线性飞机控制方法。基于backstepping理论的飞控系统不需要反馈线性化理论在飞机控制系统应用中通常所需要的时标分离假设,能够更加真实的反映飞机动态本质。本文将此方法应用在推力矢量飞机非线性控制中,并进行了大迎角过失速超机动研究,结果表明基于backstepping理论的非线性飞控系统是正确和有效的。

Nonlinear Flight Control System Based on Backstepping Theory and Supermaneuver

A nonlinear flight control approach based on backstepping theory is presented . The flight control approach based on feedback linearizaton theory is usually applied to the inner-outer loop control with the assumption that the flight dynamic property can be separated in time scale. The stability of this timescale separation approach may be analyzed by the singular perturbation theory. However, in most nonolinear flight control researches, the gain of the inner-loop controller is set much larger than that of the outer loop controller, and it is assumed that the aircraft dynamically satisfies this property. This does not guarantee the closed-loop stability. While the backstepping-based nonlinear flight control approach is used without this assumption, it avoids the hidden trouble that causes closed-loop system instability in theory. In this paper, the backstepping-based nonlinear flight control approach is applied to the Thrust-Vector Flight control system, and High-Angle-of-Attack supermaneuver is studied .Correction and availability of this approach are verified by the simulations.