基于改进趋近率的飞行转台伺服系统高精度滑模控制  

High Accurate SMC Control Based on Improving Reaching Law for Flight Simulator Servo System

作　　者：夏平[1] 张吉祥[1] 罗士淼 匡毅[1] Xia Ping;Zhang Jixiang;Luo Shimiao;Kuang Yi(School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

机构地区：[1]上海理工大学机械工程学院,上海市200093

出　　处：《农业装备与车辆工程》2017年第10期48-51,共4页Agricultural Equipment & Vehicle Engineering

摘　　要：为了解决飞行转台伺服系统非线性摩擦、参数不确定等问题,提出了基于改进趋近率的滑模控制算法。滑模控制具有强鲁棒性,可有效克服系统摩擦干扰和参数不确定性的影响,实现伺服系统的快速响应。用反正切函数代替传统指数趋近率的切换项,极大的消弱了系统抖动,提高了控制器性能。仿真结果表明所提算法在消弱抖动的同时,也能实现位置的准确跟踪与快速响应,提高了飞行转台伺服系统的控制精度与强鲁棒性。In order to solve the problems of nonlinear friction and uncertain parameters of the flight turntable servo system,asliding mode control(SMC)algorithm based on improved approach rate is proposed.Using robustness of SMC can overcomefriction disturbance and uncertainty of parameters,realize rapid response of servo system.Arctangent function is used to modifythe conventional reaching law to shapely reduce the chattering and enhance the performance of controller.Simulation result showsthat this algorithm has excellent tracking performance and rapid response at the same time of reducing chattering,and realize highaccurate control of flight rotation servo system and robustness.

关 键 词：飞行转台 摩擦干扰 滑模控制 反正切函数 

分 类 号：V216[航空宇航科学与技术—航空宇航推进理论与工程]