摘要
研究无速度传感器速度的辨识,利用永磁同步电机的定子磁链参考模型和可调模型,构造基于模型参考自适应控制的速度观测器。同时针对伺服系统中存在的参数变化、扰动等问题,提出一种新型的观测方法。运用滑模变结构控制来构造转速估计自适应律,并引入Sigmoid函数来克服滑模控制引起的抖振。通过MATLAB/Simulink仿真,表明滑模变结构MARS速度观测器能够更好地实现速度的辨识。
For studying sensorless speed identification, a speed observer was constructed based on the theory of model reference adaptive system （MRAS） by stator flux reference model and rotor flux adjustable model of permanent magnet synchronous servo motor （PMSM）. At the same time, in view of the problem existed in servo system including parametric variation and disturbance, a new ob- serve method was proposed. Sliding mode variable structure control was used to construct self-adaptation principle of rotating speed, and the sigmoid function was introduced to eliminate the common dithering of sliding mode control. By MATLAB/Simulink simulation, it is proved using sliding mode variable structure MRAS speed observer, speed identification can be effectively realized.
出处
《机床与液压》
北大核心
2013年第5期26-29,共4页
Machine Tool & Hydraulics
基金
国家自然科学基金项目(30971689)
关键词
永磁同步电机
无速度传感器
模型参考自适应
滑模控制
Permanent magnet ＇synchronous motor
Speed sensorless
Model reference adaptive system
Sliding mode control
