Sensorless Control of a Linear Permanent-Magnet Motor Based on an Improved Disturbance Observer

Zhao, Wenxiang; Jiao, Shasha; Chen, Qian; Xu, Dezhi; Ji, Jinghua

doi:10.1109/tie.2018.2823660

Cited by 73 publications

(27 citation statements)

References 25 publications

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“…The inputs of system are the direct and quadrature voltage which are denoted as u d (t), u q (t). Additionally, f (t) is disturbance load and f m (t) represents for a combination of detent force (including cogging and ending force [28]) and the force generated by inductance fluctuation [29].…”

Section: Problem Statementmentioning

confidence: 99%

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Observer-Based Tracking Control for Polysolenoid Linear Motor with Unknown Disturbance Load

Quang

2020

Actuators

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Linear motors have been playing a crucial role in mechanical motion systems due to its ability to provide a straight motion directly without mediate mechanical actuators. This paper investigates tracking control problems of Polysolenoid Linear Motor, which is a particular type of permanent magnet linear motor in a tubular structure. In order to deal with unmeasurable velocity, our method proposes a novel observer guaranteed asymptotic convergence of the observer errors. Then, based on observed velocity, our method proposes controllers for position-velocity and current tracking control concerning an unknown disturbance load problem by using Lyapunov direct method. The proposed controllers ensure that the position-velocity tracking error converges to arbitrarily small values by adjusting control parameters. Finally, the validity and effectiveness of our approach are shown in illustrative examples.

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Section: Problem Statementmentioning

confidence: 99%

“…From (10) and (11), parameters of observer (8) are give by K = 100, h 1 = 10 3 , h 2 = 2 × 10 4 , α = 30, γ = 0.1. In addition, (27), (28) and (29) result in the position and current controller parameters: K p = 10 5 , K v = 2 × 10 3 , K d = K p = 10, K id = K iq = 10 4 .…”

Section: Numerical Simulationmentioning

confidence: 99%

Observer-Based Tracking Control for Polysolenoid Linear Motor with Unknown Disturbance Load

Quang

2020

Actuators

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“…These back EMF observers can give precise rotor position estimation at nominal and high speeds. However, their performance deteriorates drastically at low speeds because the EMF is too low to be detected [13]. To realize ideal sensorless control of PMSMs over full speed range, hybrid solutions which combine the two methods are proposed [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Research on Startup Process for Sensorless Control of PMSMs Based on I-F Method Combined With an Adaptive Compensator

et al. 2020

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Speed control of permanent magnet synchronous motors (PMSMs) without position sensors is preferable in some applications due to cost and mounting space concerns. For applications in which the operating speed is relatively stable, the dynamic performance and efficiency demands of PMSMs are not severe during the startup process. Under such circumstances, a sensorless controller based on back electromotive force (EMF) estimation combined with a simple startup strategy is a suitable solution. In this paper, an If (current-frequency) startup method and a sliding mode observer are adopted to develop a sensorless control system, and the startup process which employs the If method is analysed in detail. Based on the analysis, this paper proposes a simple and robust startup strategy with an adaptive compensator to realize the smooth transition from If control to EMF-based control. The proposed strategy allows quick startup from standstill under different load conditions without initial position estimation. Furthermore, the strategy does not introduce any additional control coefficients, and none of the original control coefficients need to be adjusted. The strategy is suitable for both surface and interior PMSMs, and a test bench based on an interior PMSM is built to validate its properties. The experimental results show that the motor can smoothly accelerate from standstill to its rated speed in less than 2 s in both loaded and non-loaded situations, and the transition between the two sensorless control methods does not cause any large speed or current fluctuations.

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“…Backstepping has been widely used in motor control due to its easy combination with other control techniques such as adaptive control and slide structure control. Backstepping control can achieve complete decoupling of the PMLSM [12], and a controller based on backstepping has global stability [13]. However, traditional backstepping control requires accurate model information and cannot adapt to parameters that are changing with time [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Prescribed Performance Adaptive Backstepping Control for Winding Segmented Permanent Magnet Linear Synchronous Motor

Zhang

Lou

et al. 2020

MCA

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In this paper, a prescribed performance adaptive backstepping control (PPABC) strategy is proposed to control the speed of a winding segmented permanent magnet linear synchronous motor (WS-PMLSM) with variable parameters and an unknown load disturbance. Firstly, a mathematical model of WS-PMLSM is provided. Then, the prescribed performance technique is introduced in the adaptive backstepping control to improve the transient performance and ensures the tracking error converges within a predetermined range. In addition, a constrained command filter is introduced to address the problem of differential expansion which exists in the traditional backstepping method, and a filter compensation signal is designed against the filter error. Moreover, the adaptive law is designed based on Lyapunov stability theory to estimate the uncertainties caused by parameter changes and load disturbances. The stability of the proposed control strategy is given and the simulation of the control system is carried out under the proposed PPABC in contrast with another backstepping control and traditional PI control. Finally, the experiment is conducted to further show the effectiveness of the proposed controller.

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Sensorless Control of a Linear Permanent-Magnet Motor Based on an Improved Disturbance Observer

Cited by 73 publications

References 25 publications

Observer-Based Tracking Control for Polysolenoid Linear Motor with Unknown Disturbance Load

Observer-Based Tracking Control for Polysolenoid Linear Motor with Unknown Disturbance Load

Research on Startup Process for Sensorless Control of PMSMs Based on I-F Method Combined With an Adaptive Compensator

Prescribed Performance Adaptive Backstepping Control for Winding Segmented Permanent Magnet Linear Synchronous Motor

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