Tracking Control of Dc Motors via Input-Output Linearization

Fatehi, F.

doi:10.1080/07313569608955671

Cited by 24 publications

(8 citation statements)

References 9 publications

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“…Applications of these techniques have been investigated to the control of induction motors [2], switched reluctance motors [3], synchronous servomotors [4], and series and shunt DC motors [5][6][7][8]. In a separately excited DC motor (SEDCM) drive, an input-output linearizing controller for speed tracking was designed only in the armature voltage control range, moreover just considering a particular fan-type load torque with no uncertainty [9]. Although nonlinear multi-input multi-output (MIMO) field-wakening controllers recently have been proposed for speed tracking, the parametric uncertainties that are not considered here will significantly affect the dynamic response and stability of these controllers [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Adaptive MIMO Backstepping Controller for High-Performance DC Motor Field Weakening

Liu¹,

Rashid²

2003

Electric Power Components and Systems

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A novel field-weakening technique has been investigated for separately excited DC motor systems that exhibit considerable nonlinearities. Based on proper selection of a Lyapunov function, an adaptive multi-input multi-output backstepping field-weakening control law has been derived for speed tracking. Because of the decoupling effect, this controller achieves speed tracking at any desired set point of operation. Computer tests are carried out for a specific motor to demonstrate the effectiveness of the proposed controller. It has been shown that the controller provides the globally robust speed control performance, while the motor system is operated over a wide dynamic regime of field weakening, even under the presence of uncertainties in both parameters and load torque.

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Section: Introductionmentioning

confidence: 99%

Adaptive MIMO Backstepping Controller for High-Performance DC Motor Field Weakening

Liu¹,

Rashid²

2003

Electric Power Components and Systems

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“…In DC motor drives, a great deal of attention has been given to nonlinear feedback linearizing control of series and shunt DC motors [9][10][11][12]. By these techniques, speed tracking of a SEDCM is considered in the armature control range (below base speed W N ) under known nonlinear load (fan type) [13]. For eld control, the motor has two equilibrium points, A (!…”

Section: Introductionmentioning

confidence: 99%

Nonlinear MIMO Speed Sensorless Controller for DC Motor Field Weakening

Muhammad¹

2000

Electric Machines & Power Systems

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This paper addresses speed control of a separately excited DC motor (SEDCM) in nonlinear eld weakening region. Input output linearization (IOL) technique is used to deal with the motor system with considerable nonlinearity, and a nonlinear multi-input multi-output (MIMO) speed tracking controller is developed for constant power eld weakening. The eOE ects of decoupling and linearization permit the controller to be implemented and operated at any desired eldweakening point of operation. The control scheme combining this controller with nonlinear speed/load torque observer is, in particular, proposed for speed sensorless operation. Computer simulations are presented to show speed tracking performance of the proposed overall scheme.

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“…Chiasson et al developed FL controllers with speed/ load torque observer to control series and shunt DC motors [11,12]. Speed tracking control of an SEDCM is carried out in the armature voltage control range, just considering fan-type load torque with no uncertainty in [13], and FL design combined with optimal control method is applied to a ring angle control of the SEDCM fed by a three-phase thyristor recti er [14]. It is noted that applying these two methods has never been reported to the successful eld-weakening implementation of an SEDCM system.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Load-Adaptive MIMO Controller for DC Motor Field Weakening

Muhammad

2000

Electric Machines & Power Systems

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Control problem of eld weakening for a separately excited DC motor system, modeled in nonlinear diOE erential equations, is tackled in this paper. A novel constant power eld weakening controller, based on nonlinear load-adaptive multi-input multi-output (MIMO) linearization technique, is developed to achieve high-performance speed tracking through rejecting load disturbance. The eOE ects of decoupling and linearization permit the controller to be implemented and operated at desired eld weakening point of operation. Computer simulations are presented to demonstrate the eOE ectiveness of the proposed controller for a speci c motor. It has been shown that the proposed controller provides higher dynamic performance in comparison with traditional PI controllers, whereas the motor system is run over wide dynamic eld weakening regimes.Implementation of eld weakening is combined with armature voltage control to give a very wide speed range in separately excited DC motor (SEDCM) drive applications. Typical examples of these applications are extensively found in rolling mills, paper mills, robotics, and machine tools. An SEDCM system is modeled by three nonlinear diOE erential equations in eld-weakening region (! ! N ). Therefore, it is di cult to apply the linear control techniques, based on the linearized model about a nominal set point, to the nonlinear system [1,2]. For example, it is clear that the motor speed response becomes worse when it is operated by the traditional linear PI implemented control scheme shown in [2-4] over wide dynamic eld-weakening regimes (Fig. 1). For drive applications requiring high dynamic control performance, it is necessary to take the full-order electromechanical motor system with nonlinearities into account in the closed-loop control design.There has been recent interest in the study of advanced approaches for dealing with the SEDCM drive with eld weakening by adaptive gain scheduling and neural network controllers [5,6]. These approaches appear to be valuable in the situation

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Tracking Control of Dc Motors via Input-Output Linearization

Cited by 24 publications

References 9 publications

Adaptive MIMO Backstepping Controller for High-Performance DC Motor Field Weakening

Adaptive MIMO Backstepping Controller for High-Performance DC Motor Field Weakening

Nonlinear MIMO Speed Sensorless Controller for DC Motor Field Weakening

Nonlinear Load-Adaptive MIMO Controller for DC Motor Field Weakening

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