永磁同步直线电机的趋近率自适应软切换离散滑模控制  

Reaching Law Adaptive Soft Switching Discrete Sliding Mode Control for Permanent Synchronous Linear Motor

作　　者：杨克立 程辉 

机构地区：[1]中原工学院工业训练中心,河南郑州450007 [2]河南工程学院电气信息工程学院,河南郑州451192

出　　处：《机床与液压》2018年第4期120-123,共4页Machine Tool & Hydraulics

基　　金：国家自然科学青年基金项目(61405054);河南省高等学校重点科研项目(15B470001);河南工程学院博士基金(D201213)

摘　　要：针对存在不确定参数、摩擦及外部扰动的永磁同步直线电机伺服系统,提出一种自适应软切换滑模位置控制策略。首先,将直线电机伺服系统的模型进行状态离散化;然后根据离散化的系统模型,设计一种切换增益自适应变化的滑模控制器;同时,对设计的闭环控制系统进行稳定性分析,并利用正切函数代替符号函数,进一步改善系统的性能;最后通过仿真实验将此方案与经典PID控制及滑模控制进行比较,仿真结果验证了此方案具有更好的跟踪性能和对不确定扰动的鲁棒性。Focusing on the effects of parameter uncertainties, fiction, and external disturbances existed in the permanent magnet linear motor servo systems, a kind of adaptive soft switching sliding mode position control scheme was proposed. The dlscretization state space mode of the linear motor servo systems was obtained. Then, the sliding mode controller with adaptive switching gain was designed on the discretization state space system mode. Next, the stability of the designed closed-loop control system was analyzed and the performance of the system was further improved by using the tangent function instead of the symbolic function. Finally, the simula- tion results show that the proposed scheme has better performance than classical PID control and sliding mode control.

关 键 词：直线电机 离散滑模控制 趋近率 自适应 

分 类 号：TH16[机械工程—机械制造及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]