航空泵试验台驱动变结构控制

飞机液压系统泵源需进行地面试验,采用变频调速器＋异步电机＋增速箱的驱动形式是航空泵进行地面试验最先进有效的方法之一.建立了矢量控制变频调速驱动下航空泵试验台驱动系统的数学模型,针对航空泵试验时由于负载变化泵转速不能保持恒定的问题,采用积分滑模面的滑模变结构控制策略,并构造Lyapunov函数证明其稳定性.为降低输出抖振现象,提出采用模糊控制监督下的滑模变结构控制和伪微分反馈(PDF, Pseudo Derivative Feedback)控制相结合的控制策略,仿真及实验结果表明,该控制方法有很高的控制精度,在保持滑模变结构控制鲁棒性强的前提下降低了输出抖振现象.

Variable structure control of testing bed drive for aero hydraulic pump

It is necessary to test the hydraulic power on ground,the method of frequency inverter asynchronous motor increasing gear box is one of advanced and effective way in the testing of aero hydraulic pump on ground.The mathematical model of drive system with vector control inverter of aero testing bed was established.Aiming at problems that the pump rotate speed did not keep constant if the load variable at the process of experiment on ground,a control algorithms called sliding mode control(SMC) with integral sliding surface was adopted,and Lyapunov function was constructed to prove the stability.To debase the chatting phenomenon,a control algorithm combine SMC and pseudo derivative feedback(PDF) control supervised by fuzzy control was put forward.The simulation and test results show that this control method has high speed precision and can decrease chatting phenomenon under the condition of retaining the robustness of SMC.