乘波体高超声速飞行器大包线鲁棒控制技术  

Robust control for waverider hypersonic vehicle of large envelope

作　　者：孟中杰[1] 闫杰[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《飞行力学》2011年第5期62-65,共4页Flight Dynamics

基　　金：国家自然科学基金资助(90816027);航天支撑基金资助(2010-HT-XGD)

摘　　要：乘波体高超声速飞行器的机体/动力耦合及大包线飞行特点导致其控制系统设计困难。基于大量气动数据,采用拟合的方法建立数学模型,并进行小扰动线性化,将机体/动力耦合、大包线飞行等转化为模型参数的大范围摄动。基于LQR和H∞理论设计双回路控制系统,内回路用于抑制模型参数的大范围摄动,外回路用于满足系统的性能要求。仿真结果表明:控制系统能够很好地跟踪速度/高度指令,跟踪速度快,精度高,系统计算量小,满足工程应用需求。The unique airframe/thrust coupling and large envelope flight characteristics made the designing of flight control system for waverider hypersonic vehicle very difficult.Based on a mass of data,the model was established by curve fitting and linearized on the condition of little perturbation,which made the airframe/thrust coupling,large flight envelope and others to the large-scale parameters perturbation.The dual-loop control system was designed by LQR theory and H∞theory.The inner loop controller was designed for inhibiting the influence of large-scale parameters perturbation and the outer loop controller was for meeting various performance requirements.Simulation results show that the control system can track the velocity/altitude instructions excellently.The tracking speed is fast and the tracking error is small.The computation of controller is small,which can meet the needs of engineering applications.

关 键 词：高超声速飞行器 飞行控制 大包线 鲁棒控制 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计]