Microprocessor-Controlled DC Motor for Load-Insensitive Position Servo System

Ohishi, Kiyoshi; Nakao, Masato; Ohnishi, Kouhei; Miyachi, Kunio

doi:10.1109/tie.1987.350923

Cited by 532 publications

(236 citation statements)

References 5 publications

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“…This practical hindrance led researchers to a shortcut: to each joint, the coupling force from other joints can be estimated in real time and canceled, resulting in a much simpler and more effective solution called disturbance observer (DOB) [4]. But by habit, the notion of disturbance used in the framework of DOB distinctly refers to something external, even though the solution equally applies to disturbances that are state dependent, thus creating an awkwardness in articulating exactly what kind of uncertainties with which the method deals.…”

Section: The Evolving Notion Of Disturbancementioning

confidence: 99%

On the centrality of disturbance rejection in automatic control

2014

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Section: The Evolving Notion Of Disturbancementioning

confidence: 99%

On the centrality of disturbance rejection in automatic control

2014

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“…As one can see from (8), the three equations are linear dependent, and thus one more property is needed to solve three back-EMFs. During any conducting interval, since only two phases are conducting and the third one is floating, the back-EMFs of the two conducting phases, the flat area in Fig.…”

Section: S Ri S Ls I S E S V S Ri S Ls I S E S V S Ri S Ls I S E Smentioning

confidence: 99%

“…The DOB is often applied to the inner-loop of the motion control structure to reject equivalent disturbance as much as possible for achieving precise position tracking. It was first introduced by Ohnishi [8] and refined by Umeno and Hori [9]. This paper presents a new model-based sensorless drive based on back-EMF difference detection method.…”

Section: Introductionmentioning

confidence: 99%

Disturbance Observer Structure Applied to Sensorless Brushless DC Motors Drive

Wang¹,

Chin-Hsuan²,

Lee³

2015

IJCTE

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Abstract-In a permanent magnet (PM) brushless dc motor (BLDC), the performance of Hall effect sensors are not reliable in some applications. The back electromotive force (back-EMF) signal is used instead since the zero-crossing points of back-EMF can be used to provide the rotor position information. In this paper, a new back-EMF difference detection method based on disturbance observer is proposed. The proposed structure can detect the back-EMF as well as back-EMF difference signal. The zero-crossing points of the back-EMF difference can be used directly for commutation, requiring no phase shift. Simulation and experiment results are provided to show the feasibility of the proposed method.

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“…Disturbance observer based control (DOBC) methods provide powerful abilities in handling system disturbances and improving robustness [1]. The disturbance observer technique was first presented by Ohishi et al [2] for a position servo system in the late 1980s. During the last three decades, DOBC schemes for linear and nonlinear systems have been proposed and applied successfully in various practical areas, e.g., servo control systems [3,4], robotic systems [5,6,7], hard disk drive systems [8,9], flight control systems [10,11], and process control systems [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Robust control of nonlinear MAGLEV suspension system with mismatched uncertainties via DOBC approach

et al. 2011

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Robust control of a class of uncertain systems that have disturbances and uncertainties not satisfying “matching” condition is investigated in this paper via a disturbance observer based control (DOBC) approach. In the context of this paper, “matched” disturbances/uncertainties stand for the disturbances/uncertainties entering the system through the same channels as control inputs. By properly designing a disturbance compensation gain, a novel composite controller is proposed to counteract the “mismatched” lumped disturbances from the output channels. The proposed method significantly extends the applicability of the {DOBC} methods. Rigorous stability analysis of the closed-loop system with the proposed method is established under mild assumptions. The proposed method is applied to a nonlinear {MAGnetic} {LEViation} (MAGLEV) suspension system. Simulation shows that compared to the widely used integral control method, the proposed method provides significantly improved disturbance rejection and robustness against load variation

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Microprocessor-Controlled DC Motor for Load-Insensitive Position Servo System

Cited by 532 publications

References 5 publications

On the centrality of disturbance rejection in automatic control

On the centrality of disturbance rejection in automatic control

Disturbance Observer Structure Applied to Sensorless Brushless DC Motors Drive

Robust control of nonlinear MAGLEV suspension system with mismatched uncertainties via DOBC approach

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