新型终端滑模观测器在PMLSM中的应用  

Application of A Novel Terminal Sliding Mode Observer for Permanent Magnet Linear Synchronous Motor Control

作　　者：张博[1] 齐蓉[1] 

机构地区：[1]西北工业大学,西安710129

出　　处：《微特电机》2017年第4期10-15,共6页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51407143);陕西省微特电机及驱动技术重点实验室开放基金项目(2013SSJ10022)

摘　　要：为了提高电机位置和速度的估计精度,提出一种基于比例-积分算法的二阶非奇异终端滑模观测器设计方法。该方法是将比例-积分算法引入到非奇异终端滑模面的设计中,不但可有效地抑制常规一阶滑模的固有抖振,而且可以通过比例和积分参数的调节来改善估计值的稳态误差。同时,为了保证观测器的稳定性和有限时间收敛特性,设计了反电势观测器的二阶滑模控制律,并根据锁相环原理,将位置和速度信号从反电动势估计值中解调出来。最后,通过与2种典型的常规滑模观测方法进行实验对比,结果证明了所提方法的有效性。There are problems of low accuracy and high chattering existing in the permanent magnet linear synchronous motor（PMLSM） sensorless control system, when the conventional sliding mode observers are used. In order to improve the estimation accuracy of the position and speed, a second-order-nonsingular-terminal-sliding-mode observer design meth- od, which is based on proportional-Integral（FI） algorithm, was proposed. The method introduces the PI algorithm into the design of the general non-singular terminal sliding surface. It not only could effectively restrain the inherent chattering in the traditional first-order sliding mode, but also reduce the steady-state errors of the estimated values by adjusting the pro- portional and integral parameters. Furthermore, in order to ensured the stability and the finite time convergence property of the observer, the second-order sliding mode control law of the BEMF was designed. According to the phase-locked loop （PLL） principal, the signals of the position and speed could be demodulated from the BEMF estimated values. Finally, comparative experiments have been done using two typical-traditional sliding mode methods. The results validate the pro- posed method.

关 键 词：二阶终端滑模 反电动势观测器 比例-积分调节 锁相环 永磁直线同步电机 无位置控制系统 

分 类 号：TM351[电气工程—电机] TM359.4