飞机舵面损伤的简单自适应重构控制方法

A Simple Adaptive Reconfigurable Control Method for Aircraft Control Surface Loss-of-Effectiveness Failures

针对飞行控制系统操纵面损伤故障,采用简单自适应控制算法进行重构飞行控制系统(FCS)的设计。在应用简单自适应控制时,尤其是在操纵面发生不同损伤程度故障时,必须确保闭环系统的几乎严格正实性。通过求解线性矩阵不等式的可行解问题,得出并联前馈补偿器,确保闭环系统的稳定性和增广系统的严格正实性。利用某型飞机的侧向飞行控制系统模型,将该方法应用于飞行控制系统的重构设计。仿真结果表明,简单自适应控制方法不仅适合于正常情况下的飞控系统设计,而且对操纵面损伤故障具有较强的适应能力。与常规的线性二次型反馈控制器相比,提出的自适应控制器具有更好的跟踪效果和重构控制效果。

A simple adaptive control algorithm is applied to the design of a reconfigurable flight control system （FCS） in the case of aircraft control surface loss-of-effectiveness failures. When the simple adaptive control is employed, the condition of almost strictly positive realness （ASPR） of closed-loop system must be satisfied, especially when different damages occur in the control surface. A parallel feedforward compensator is obtained by solving the feasibility problem of linear matrix inequalities, and the stability of the closed-loop system and the almost strictly positive realness of the augmented system are guaranteed. The proposed scheme is applied to the reconfigurable design of the flight control system with the help of the lateral flight control system model of an aircraft. The simulation results show that the presented method can not only be suitable for the flight control system in normal flight conditions, but also has strong adaptive capability for the control surface damages. The proposed adaptive controller exhibits improved tracking and reconfigurable control performances compared with the conventional linear-quadratic regulator （LQR） feedback controller.