【摘要】 提出一种基于新型反电势扩展滑模观测器的直线速度软检测方法.以电流微分方程和反电势微分方程为观测模型,采用开关控制律,以实际电流和观测电流之间的误差为切换函数,反电势观测结果由一系列开关脉冲通过积分得到连续正弦信号,可直接用于速度的软检测.实验表明,PMLSM直线伺服系统可在其额定最大速度的10%以上实现无光栅尺的闭环控制运行,满足纠偏控制系统对执行速度的控制要求,在实际试用中达到预期目标.更多还原

【Abstract】 A velocity soft detection method,which is based on novel back-EMF extended sliding observer for PMLSM is proposed.The novel observer takes the current and back-EMF differential equations as an observation model.The errors between actual and observed current are taken as the switching function.The observational result of back-EMF is obtained by the integrating of a series switch pulses and the result is a continuous sinusoidal variable.It can be directly used to estimate the velocity.The experimental results show that the PMLSM servo system can well operate without grating sensor when the velocity is faster than 10% of its rated maximum,and meeting the requirements of the running speed.The rectification control system can satisfy with the expected goal when it is used in an actual trial.更多还原