针对分数阶滑模控制在永磁直线同步电机(Permanent Magnet Linear Synchronous Motor，PMLSM)直接推力控制下转速环精度不高、磁链和推力波动大等问题，提出一种改进的分数阶滑模控制算法，即分数阶双幂次指数趋近律、分数阶变速趋近律相结合的组合趋近律，能有效减弱滑模控制引起的系统振荡，加快趋近速率。仿真结果表明:与分数阶滑模控制相比，在PMLSM直接推力控制系统中采取改进分数阶滑模控制，磁链和推力波动明显减弱，系统响应速度加快，提高了 PMLSM推力响应的抗干扰能力。
PMLSM DIRECT FORCE CONTROL BASED ON IMPROVED FRACTIONAL ORDER SLIDING MODE CONTROL
Aimed at the problems of the integer-order sliding mode control under the direct force control of the permanent magnet linear synchronous motor(PMLSM)that the accuracy of the speed loop is not high and the flux linkage and the thrust fluctuation are large,an improved fractional-order sliding mode control algorithm is proposed.The combination of the double-power exponential reaching law and the fractional variable speed reaching law could effectively reduce the system oscillation caused by sliding mode control and accelerate the approach rate.The simulation results show that compared with integer-order sliding mode control,when the improved fractional-order sliding mode control is adopted in the PMLSM direct force control system,the flux linkage and thrust fluctuations are significantly reduced,the system response speed is accelerated,and the anti-interference ability of the PMLSM thrust response is improved.
Permanent magnet linear synchronous motorFractional sliding mode controlCombination reaching lawDirect force control
万方数据
维普
