电液伺服加载系统四连杆机构控制器设计

该文针对飞机起落架电液伺服加载过程中非线性传动机构的动态特性进行分析。确认在动态加载过程中因四连杆机构的非线性特性造成的系统动态跟踪效果不佳的具体原因,基于逆系统的思路找到了一种非线性数学模型与PID控制器结合的控制方法。采用模型预测的方法对系统进行误差补偿。使用简化了的电液伺服作动系统数学模型与该控制方法进行MATLAB/simulink仿真。使用此方法大大提高了起落架加载系统的动态跟踪性能。

Controller Design of Electro-hydraulic Servo Loading System With Four Bar Linkage

This article analyzed the dynamic characteristic on the nonlinear actuator which used in loading process of electro-hydraulic servo loading system for aircraft landing gear simulation.Made sure the specific reasons how the nonlinear characteristic of the four bar linkage adversely affected the dynamic tracking expression.Found a control method which combine nonlinear mathematical model with PID controller.Used the method of model predictions to make error compensation of the system based on the thought of inverse system.Made MATLAB/simulink simulation by using simplified mathematical model of electro-hydraulic servo actuator system and such control method.Using this method greatly improves the landing gear loading system dynamic tracking performance.