基于模糊滑模变结构控制的直线伺服系统研究  

Research on Linear Servo System Based on Fuzzy Sliding Mode Variable Structure Control

作　　者：林健[1] 郭秀杰[1] 

机构地区：[1]南京工程学院先进数控技术江苏省高校重点建设实验室,南京211167

出　　处：《微电机》2017年第1期39-42,共4页Micromotors

基　　金：国家自然科学基金项目(61503180);江苏省自然科学基金项目(BK20130744);江苏省高校自然科学研究项目(13KJB120003)

摘　　要：直线伺服系统是一个复杂的非线性时变系统,采用滑模变结构控制器对动子磁链和推力脉动造成的误差有较强的鲁棒性。然而滑模控制中存在抖振及响应速度慢的问题,针对此问题设计了一种模糊滑模变结构控制器。此控制器在趋近运动段采用指数趋近律,可以使系统快速到达切换面,在滑模运动段采用模糊控制实现滑模的切换控制,并利用Matlab进行仿真。仿真结果表明,与传统的滑模变结构控制相比,本算法可使系统有效地削弱滑模切换控制所产生的抖振,加快系统的响应速度。Linear servo system is a complex nonlinear time-varying system,and the error caused by the rotor flux linkage and thrust fluctuation has strong robustness by sliding mode variable structure controller. A fuzzy sliding mode variable structure controller was designed to solve the problem of chattering and slow response in the sliding mode control. This controller used exponential approach law in reaching motion,and the system reached the sliding surface quickly. The sliding mode switch control was realized by using fuzzy control in sliding mode motion,and the Matlab was used in simulation. The simulation results show that the algorithm can make the system effectively weaken the chattering of the sliding mode switch control,and accelerate the response speed of the system compared by the sliding mode variable structure controller.

关 键 词：直线伺服系统 模糊滑模变结构控制 MATLAB仿真 

分 类 号：TM273[一般工业技术—材料科学与工程]