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针对高超声速飞行器具有强烈的非线性、耦合及不确定性等特点,且存在系统噪声和量测噪声,使姿态控制变得困难的问题,提出了采用LQG/LTR控制方法进行全通道姿态控制的思路。首先,在平衡点通过小偏差线性化方法建立多变量耦合的控制模型;然后,运用LQG/LTR控制方法设计姿态控制器。仿真结果表明,在有高斯噪声情况下,所设计的姿态控制系统实现了指令精确跟踪,具有较强的鲁棒性。
Aiming at the problem that the hypersonic vehicle has such characteristics as strong nonlinearity, coupling and uncertainty, and the existence of system noise and measurement noise makes the attitude control difficult, a LQG / LTR control method for full-lane attitude control Ideas. Firstly, a control model of multivariable coupling is established by the method of small deviation linearization at the equilibrium point. Then, the attitude controller is designed by LQG / LTR control method. Simulation results show that in the presence of Gaussian noise, the attitude control system designed to achieve the instruction of precise tracking, with strong robustness.