基于奇异摄动永磁直线同步电动机的滑模控制  

Sliding mode control for PMLSM based on singular perturbation

作　　者：孙宜标[1] 袁晓磊[1] 包岩峰[2] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110178 [2]辽宁省机械研究院有限公司,沈阳110032

出　　处：《沈阳工业大学学报》2008年第4期379-383,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(50075057);辽宁省自然科学基金资助项目(20052045)

摘　　要：针对永磁直线同步电动机(PMLSM)伺服系统存在参数摄动和外部扰动,且机械与电气变量之间存在耦合关系,严重影响伺服系统的鲁棒性和精度的问题,提出基于奇异摄动模型化简的滑模变结构控制方法.利用奇异摄动原理将PMLSM的高阶数学模型化简为二阶线性模型.采用滑模变结构控制来提高含有大量不确定性参数和扰动的系统的鲁棒性;采用连续逼近法来避免不连续切换控制引起的抖振现象.仿真结果表明,所提出的控制策略使PMLSM伺服系统对外部扰动和参数不确定性具有很强的鲁棒性.The parameter perturbation, external disturbance and coupling of current and speed in PM linear synchronous motor （PMLSM） servo systems have tremendous influence on the robustness and precision of servo systems. Thus, a sliding mode controller was designed based on model predigestion using singular perturbation theory. The high-order mathematic model of PMLSM servo system was predigested into second-order linear model. The sliding mode controller was used to enhance the robustness of the system containing a great amount of uncertain parameters and disturbances. The continuous approximation method was used to substitute discontinuous switch control laws to avoid the buffeting phenomenon form the latter. The simulation results show that the proposed control strategy can make PMLSM servo system have strong robustness against parameters uncertainties and external disturbance.

关 键 词：永磁直线同步电动机 奇异摄动 参数不确定性 滑模控制 连续逼近法 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TM359.6[自动化与计算机技术—控制科学与工程]