基于模糊树逆方法的高超飞行器变质心控制  

Moving-mass control of hypersonic vehicles based on fuzzy tree inverse method

作　　者：张臻[1] 王玉坤 毛剑琴[1] 

机构地区：[1]北京航空航天大学智能结构动力学与控制实验室,北京100191

出　　处：《中国科学：信息科学》2012年第11期1379-1390,共12页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:91016006;91116002);中央高校基本科研业务费专项资金资助项目

摘　　要：本文针对高超飞行器变质心姿态动力学模型所具有的高度非线性、多变量、强耦合特性,通过合理的简化,得到了一个耦合的非线性动力学系统;根据简化模型的特点,将该模型分为俯仰偏航通道模型和滚动通道模型,通道间耦合视为扰动.应用模糊树模型逼近俯仰偏航通道的逆模型,实现了俯仰偏航通道解耦线性化,对各线性子系统设计闭环控制器,实现了飞行器俯仰偏航通道姿态角的跟踪;应用预测变结构方法保证了滚动通道的快速稳定并且无抖振现象.最后,将该方法应用于高超飞行器姿态系统控制的仿真研究,表明了本文方法的有效性和可行性.Moving-mass control is a brand-new way of flight control method. Compared with aerodynamic rudder control method which has been widely used in flight control field, it can avoid the aerodynamic heating on the rudder surface when aircraft is flying in high Mach number, and it can improve the mobility and agility of the aircraft. Aimed at moving-mass attitude dynamic model of hypersonic vehicle is a highly nonlinear, multivariable and strong-coupling system. In this paper, a simplified dynamic model is proposed based on the reasonable assumption. According to the characteristics of the simplified model, the model is divided into pitch- yaw channel model and roll channel model. The coupling between pitch-yaw channel and roll channel is treated as perturbations in this system. A fuzzy tree inverse model is established to realize the decoupling and the linearization of the pitch-yaw channel. For nonlinear system inversion error caused by modeling errors and uncertainties, the closed-loop controllers for each linear subsystem are designed to track pitch-yaw attitude angle. A predictive variable structure controller is designed to keep rolling channel fast-stable without strong chattering phenomenon. Finally, simulations applying the mentioned control scheme in attitude system of hypersonic vehicle indicate the effectiveness and feasibility of this scheme.

关 键 词：变质心 模糊树模型 预测变结构控制 逆系统方法 姿态控制 

分 类 号：V249[航空宇航科学与技术—飞行器设计]