电液伺服加载系统控制方法的改进研究  

Improvement of Control Method for the Electro-hydraulic Loading System

作　　者：王汉军[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《计算机仿真》2009年第11期327-330,363,共5页Computer Simulation

摘　　要：电液伺服加载系统用于仿真飞行器在空中飞行所受到的气动力状况,有效的消除由舵机的主动运动所引起的多余力是电液伺服加载中的核心问题。针对此问题采用经典的结构不变性原理设计消扰控制器进行消扰时所存在的消扰器微分阶数较高,信号的品质不好,实现起来比较困难等缺陷,选取了不同的反馈输出信号进行改进设计,降低消扰器阶数,并通过测量内部反馈信号来补偿伺服阀的流量变化。建立了电液伺服加载系统数学模型,并利用该模型对改进设计进行仿真验证。试验结果表明:改进设计系统满足预期指标要求,较好地消除了加载系统跟踪的滞后,有效减少多余力,效果令人满意。The electro - hydraulic loading is widely used to simulate the pneumatic force acting on the aircrafts in the aero industry. Active movement of aircraft＇ s accessory？ forces strong upset to the loading system. The classical way to solve this problem is to design a controller based on structure invariance theory. But the result is not good enough because of the bad quality of signals and the high rank of the controller. It is difficult to be actualized. A control method to reduce the extra force via internal - feedback is presented, which can compensate flux variety of servo valve by measuring the internal - feedback signal, and result in eliminating the hysteresis of loading systems. Different feedback output signals are selected to design the new controller, whose rank is effectively reduced. The improved feedback function is simple, and it is easily to be applied in project. A mathematical model for electro - hydraulic loading systems is established, with which, the computer simulation of improvement is done. According to the result of simulation, the loading system tracks position system without delay. It can eliminate the extra force.. The effect is satisfactory.

关 键 词：电液伺服加载 多余力 结构不变性原理 内反馈 

分 类 号：TP271.9[自动化与计算机技术—检测技术与自动化装置]