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首先建立了主动控制起落架系统的非线性动力学模型。然后根据最优控制理论,在Matlab的环境下,应用模拟退火算法设计了多目标最优的PID控制器。最后应用Simulink控制系统仿真软件对主、被动起落架在地面信号为弹伤跑道信号的条件下进行了性能仿真。对仿真结果进行了分析比较,得出的结论是利用最优控制理论设计的多目标最优的PID控制器的主动控制起落架能显著降低飞机的振动冲击载荷,能提高飞机机体和起落架的疲劳寿命,降低跑道不平度对飞机机体和起落架的冲击载荷和振动响应;同时提高飞机的滑行品质和乘客的舒适性。
First of all, a nonlinear dynamic model of the active landing gear system is established. Then, according to the optimal control theory, a multi-objective optimal PID controller is designed by using simulated annealing algorithm under Matlab environment. Finally, Simulink control system simulation software was used to simulate the performance of the main and passive landing gear with the ground signal being the signal of the projectile. The simulation results are analyzed and compared, and the conclusion is that the active control gear of the multi-objective optimal PID controller designed by the optimal control theory can significantly reduce the impact load of the aircraft and improve the performance of the aircraft body and the landing gear Fatigue life, reduce runway irregularities on the aircraft body and landing gear impact load and vibration response; while improving the aircraft’s taxi quality and passenger comfort.