Controller Design for Large-Gap Control of Electromagnetically Levitated System by Using an Optimization Technique

Banerjee, Subrata; Kumar, T. Kishore; Pal, Jayanta; Prasad, D. H. L.

doi:10.1109/tcst.2007.906272

Cited by 41 publications

(12 citation statements)

References 8 publications

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“…It is an unstable plant with changing parameters, nonlinearities, and unmodeled dynamics. Different control algorithms (both linear and nonlinear) [24][25][26][33][34][35][36][37][38][39][40][41][42] have been used for magnetic levitation applications. If the design is accomplished by using linear analysis, then classical control-based cascade compensation [14,28] or state feedback control [25] can be implemented.…”

Section: Literature Surveymentioning

confidence: 99%

“…An optimization technique utilizing random search method with interval reduction, proposed by Luus and Jaakola, has been used for designing the maglev controller that provides stability and performance for an enhanced operating range [42]. A robust dynamic sliding mode control system using a recurrent Elman neural network is proposed to control the position of a levitated object of a magnetic levitation system, considering the uncertainties by Lin et al [43].…”

Section: Literature Surveymentioning

confidence: 99%

See 1 more Smart Citation

A Review Note on Different Components of Simple Electromagnetic Levitation Systems

Banerjee¹,

Sarkar²,

Biswas⃰³

et al. 2011

IETE Tech Rev

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Electromagnetic levitation is an important area of research. There is lot of applications of maglev in industry. Extensive research is going on for the last two decades throughout the world to design the latest form of the maglev system. Due to interdisciplinary nature, many aspects are still open in maglev research. The major components in an electromagnetic suspension system are (i) actuator, (ii) sensor, (iii) controller, and (iv) power amplifier. For the successful implementation for any maglev-based project, the basic knowledge of these components is necessary. In this manuscript, an extensive review of different components of electromagnetic levitation systems has been presented.

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Section: Literature Surveymentioning

confidence: 99%

Section: Literature Surveymentioning

confidence: 99%

A Review Note on Different Components of Simple Electromagnetic Levitation Systems

Banerjee¹,

Sarkar²,

Biswas⃰³

et al. 2011

IETE Tech Rev

Self Cite

View full text Add to dashboard Cite

show abstract

“…7 has been designed due to the high nonlinearity characteristics [11][12][13]. Unlike the conventional rotary motor control system with load directly applied to its operational directions, the proposed conveyance system will have the load mainly applied onto the direction that is orthogonal to the system moving directions.…”

Section: Control Strategy Design and Implementationmentioning

confidence: 99%

On the Fuzzy-Based Control Strategy Design and Implementation of a Non-Contacting Steel Plate Conveyance System

Liu

Lin

Yang

2008

2008 IEEE Industry Applications Society Annual Meeting

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In order to stabilize the steel plate conveyance process, feasibilities of incorporating the linear induction motor scheme to provide the desired propulsive/lift forces have been intensively investigated. An on-line DSP-based controller integrated with an optical gap measurement system has been successfully developed through proper electromagnetic force estimations. The closedloop feedback control strategy with fuzzy inference process has also been successfully designed and implemented. The adequacy of the proposed conveyance system for practical steel industrial applications can thus be confirmed.

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“…In order to achieve the timely and accurate control on the current through the electromagnet, various closed-loop current control approaches are proposed and mainly differ in current sensors / estimations: • Hall-effect current sensor [7,[11][12][13][14][15]: prone to electromagnetic disturbance, especially for small current; • Resistive current sensor [9,16]: prone to fluctuation by the frequent PWM switching; • Polynomial estimation [17]: based on the nonlinear relationship between the current and the PWM duty cycle; inaccurate due to temperature change of the electromagnet; untimely due to the inductance of the electromagnet; • State observer [11]: prone to nonlinearity and highly relies on the dynamic model. Hence, the hall-effect current sensor and the resistive current sensor can measure the current on the real-time basis, while the polynomial estimation and the state observer suffers from the nonlinear dynamics.…”

Section: Introductionmentioning

confidence: 99%

Close-Loop Current Control With Current-Sensing Resistor for Electromagnet Driven by Full-Bridge PWM Inverter

2022

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The full-bridge pulse-width-modulation (PWM) inverter is wildly applied to drive the electromagnet and enables advanced technologies, such as the active magnetic bearing (AMB) and the permanent-electro magnetic suspension (PEMS). However, the characteristic relationship between the current through the electromagnet and the duty cycle of the PWM signal has strong nonlinearity around the zero current. Moreover, the electromagnet possesses the induction that results in the time constant and significantly hinders the change of the current. Hence, the open-loop control of the full-bridge PWM inverter cannot accurately or timely tune the current through the electromagnet, especially around the zero current. This work proposes a closed-loop current control approach by three steps: (1) inserting a current-sensing resistor into the middle of the electromagnet, (2) obtaining the current signal with an analog signal-processing circuit, and (3) generating the PWM signal with the bang-bang control circuit. The proposed approach innovatively arranges the current-sensing resistor to take advantage of the symmetry and to minimize the influence from the high-frequency switching of the inverter, so that the measured current signal is comparable to the hall-effect current sensor. The experimental results demonstrate the effectiveness and efficiency of the proposed closed-loop current control approach, though the weak charging capability of the full-bridge PWM inverter still hinders its performance.

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Controller Design for Large-Gap Control of Electromagnetically Levitated System by Using an Optimization Technique

Cited by 41 publications

References 8 publications

A Review Note on Different Components of Simple Electromagnetic Levitation Systems

A Review Note on Different Components of Simple Electromagnetic Levitation Systems

On the Fuzzy-Based Control Strategy Design and Implementation of a Non-Contacting Steel Plate Conveyance System

Close-Loop Current Control With Current-Sensing Resistor for Electromagnet Driven by Full-Bridge PWM Inverter

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