Finite-Time Nonlinear Disturbance Observer Based Discretized Integral Sliding Mode Control for PMSM Drives

Changming Zheng; Jiasheng Zhang

Finite-Time Nonlinear Disturbance Observer Based Discretized Integral Sliding Mode Control for PMSM Drives

Changming Zheng

Jiasheng Zhang

Vol. 18, No. 4, pp. 1075-1085, Jul. 2018

10.6113/JPE.2018.18.4.1075

Discrete sliding mode control

Finite-time observer

Permanent-magnet synchronous machine drives

PDF Full-Text

Abstract

To deal with the operation performance degradation of permanent magnet synchronous machine (PMSM) drives with uncertainties and unmodeled dynamics, this paper presents a finite-time nonlinear disturbance observer (FTNDO) based discretized integral sliding mode (DISM) composite control scheme. Based on the reaching-law approach, a DISM speed controller featuring a superior dynamic quality and global robustness against disturbances is constructed. This controller can avoid the reaching phase and overlarge control action. In addition, a sliding mode differentiator based FTNDO is devised and extended to the discrete-time domain for disturbance estimation. The attractive features of the FTNDO are that it can provide a finite-time converging estimation and alleviate the chattering effect in conventional sliding mode observers, while retaining robustness to parameter variations. By feeding the estimate forward to the pre-stage DISM controller, both disturbances and chattering can be significantly suppressed. Moreover, considering the estimation error of a FTNDO caused by discrete sampling, a stability analysis of the composite controller is discussed. Experimental results validate the superiority of the presented scheme.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

C. Zheng and J. Zhang, "Finite-Time Nonlinear Disturbance Observer Based Discretized Integral Sliding Mode Control for PMSM Drives," Journal of Power Electronics, vol. 18, no. 4, pp. 1075-1085, 2018. DOI: 10.6113/JPE.2018.18.4.1075.

[ACM Style]

Changming Zheng and Jiasheng Zhang. 2018. Finite-Time Nonlinear Disturbance Observer Based Discretized Integral Sliding Mode Control for PMSM Drives. Journal of Power Electronics, 18, 4, (2018), 1075-1085. DOI: 10.6113/JPE.2018.18.4.1075.