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飞机进场着陆过程中,速度、迎角和俯仰角速度等多参数的跟踪模拟是一个复杂的多输入输出系统,采用传统的控制方法难以获得满意的控制效果。根据系统控制要求,提出一种利用最优二次型调节器(LQR)的控制方式。首先分析跟踪模拟的结构形式,把模型跟踪问题化为最优二次型状态调节器,确定控制律的基本结构;然后对某型飞机进场着陆阶段特性利用TIFS飞机进行模型跟踪控制律的设计,并结合经典控制理论对系统控制参数进行修正;最后利用舵机在回路的半物理试验台进行仿真。结果表明,所提出的LQR控制方法能够有效地解决多控制回路性能的自动协调,具有良好的动态响应,而且有很高的模型跟踪模拟精度。
The multi-parameter tracking simulation of speed, angle of attack and pitch angular velocity is a complex multi-input-output system during landing process. It is difficult to obtain the satisfactory control effect by the traditional control method. According to the requirements of system control, a control method using the optimal quadratic regulator (LQR) is proposed. Firstly, the structure of tracking simulation is analyzed, and the problem of model tracking is transformed into the optimal quadratic state regulator to determine the basic structure of control law. Then, the design of model tracking control law of TIFS , And combined with the classical control theory to modify the system control parameters; Finally, the use of steering gear in the loop of the semi-physical test bench for simulation. The results show that the proposed LQR control method can effectively solve the multi-control loop automatic coordination, has a good dynamic response, and has a very high model tracking accuracy.