PMSM sliding-mode control based on novel reaching law and disturbance observer

	PMSM sliding-mode control based on novel reaching law and disturbance observer
	Liu, J.; H.-W. Li and Y.-T. Deng
	2017
发表期刊	Gongcheng Kexue Xuebao/Chinese Journal of Engineering
卷号	39 期号:6
摘要	To improve the performance of the speed servo system in the permanent magnet synchronous motor (PMSM) and to reduce the influence of disturbance in the control system, a sliding mode control method was proposed based on a novel reaching law and disturbance observer. A novel reaching law was presented to solve the contradiction between sliding mode surface reaching time and the system chattering in the regular reaching law, and which can simultaneously improve the system response speed. A sliding mode disturbance observer (SMDO) was employed to estimate the system's lumped disturbances, such as parameter variations and external disturbances. The estimated value was utilized as a feed-forward to compensate for the speed controller and to further increase the anti-disturbance ability of the system. The switching gain of SMDO was designed as a function of the observed error of disturbance to suppress chattering of the sliding mode estimated value. The simulation results demonstrate that the novel reaching law has an improved dynamic system response speed compared to the regular reaching law and that it can accurately and rapidly track the step speed signal. The SMDO accurately observes the varying system disturbance. When load disturbance is added to the system, the maximum speed fluctuation under PI control is 75 rmin-1, whereas the sliding mode control, which is based on the novel reaching law and disturbance observer, records a maximum speed fluctuation of 30 rmin-1and guarantees better and more robust system performance. The experimental results demonstrate that the system that relied on the proposed sliding mode control method can rapidly track a speed command of 400 rmin-1without overshoot. The regulation time is 0.12 s and the steady-state accuracy is 4 rmin-1. The SMDO can accurately estimate the system disturbance without overshoot while also improving the system's anti-disturbance ability. When the motor is operating at a steady speed of 400 rmin-1and then is added a 0.6 Nm load torque disturbance, the method based on the novel reaching law and disturbance observer gives a maximum speed fluctuation of 23 rmin-1. This speed fluctuation represents a reduction of 8% compared to that with PI control. The simulation and experimental results are in good agreement. These results indicate that the proposed control method can improve the dynamic and robust performance of the speed servo system and effectively alleviate the chattering of the sliding mode control system. All right reserved.
收录类别	ei
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59072
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu, J.,H.-W. Li and Y.-T. Deng. PMSM sliding-mode control based on novel reaching law and disturbance observer[J]. Gongcheng Kexue Xuebao/Chinese Journal of Engineering,2017,39(6).
APA	Liu, J.,&H.-W. Li and Y.-T. Deng.(2017).PMSM sliding-mode control based on novel reaching law and disturbance observer.Gongcheng Kexue Xuebao/Chinese Journal of Engineering,39(6).
MLA	Liu, J.,et al."PMSM sliding-mode control based on novel reaching law and disturbance observer".Gongcheng Kexue Xuebao/Chinese Journal of Engineering 39.6(2017).

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