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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 body / power coupling and the large-scale flight characteristics of the bosonic hypersonic vehicle make its control system difficult to design. Based on a large number of aerodynamic data, a mathematical model is established by using the fitting method, and small perturbation linearization is carried out to transform the body / dynamic coupling and large envelope flight into large-scale perturbations of the model parameters. The dual-loop control system is designed based on LQR and H∞ theory. The inner loop is used to restrain the large-scale perturbation of the model parameters, and the outer loop is used to meet the performance requirements of the system. The simulation results show that the control system can track the speed / altitude command well, the tracking speed is fast, the precision is high, and the system computation is small, which meets the needs of engineering application.