Low order μ-synthesis controller design for a large boiler feed pump equipped with active magnetic bearings

Lösch, F.; Gähler, Conrad; Herzog, R.

doi:10.1109/cca.1999.806707

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…For the past few decades, the active magnetic bearings (AMBs) systems are extensively used in various fields such as automobiles, magnetic bearing based wind turbines, rotating machine, high-speed milling spindles, flywheel (Schweitzer et al , 1994; Sivrioglu and Nonami, 1998; Losch et al , 1999; Mukhopadhyay et al , 2000; Komori et al , 1998) and in medical sciences for making artificial heart pumps (Maslen et al , 1998; Lee et al , 2003; Shen et al , 2000). Because of its non-contact nature, it provides low frictional loss and also reduces the power requirement.…”

Section: Introductionmentioning

confidence: 99%

Design of backstepping control with CNN-based compensator for active magnetic bearing system subjected to input voltage saturation

Pati

Negi

2018

WJE

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Purpose The stability and input voltage saturation is a common problem associated with an active magnetic bearing (AMB) system. The purpose of this paper is to design a control scheme that stabilizes the single degree of freedom AMB system and also tackle the problem of input voltage saturation in the AMB system. Design/methodology/approach The proposed control technique is a combination of two separate control schemes. First, the Backstepping control scheme is designed to stabilize and control the AMB system and then Chebyshev neural network (CNN)-based compensator is designed to tackle the input voltage saturation when the system control action is saturated. Findings The mathematical and simulation results are presented to validate the effectiveness of proposed methodology for single-degree freedom AMB system. Originality/value This paper introduces a CNN-based compensator with Backstepping control strategy to stabilize and tackle the problem of input voltage saturation in the 1-DOF AMB systems.

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Section: Introductionmentioning

confidence: 99%

Design of backstepping control with CNN-based compensator for active magnetic bearing system subjected to input voltage saturation

Pati

Negi

2018

WJE

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“…H. Lee et al, 2003;J. X. Shen et al, 2000) compressors (F. Losch et al, 1999), pumps (S. Sivrioglu and K. Nonami, 1998), and flywheel systems (S. C Mukhopadhyay et al, 2000;M. Komori et al, 1998) and all these systems are designed to achieve high speed, low vibration, zero friction wear and clean environment specifications (Polajzer et al, 1999;Motee and Queiroz, 2002).…”

Section: Introductionmentioning

confidence: 99%

An anti-windup control strategy to actuator saturating input voltage for active magnetic bearing system

Pati

Negi

2016

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose The active magnetic bearing is highly nonlinear and unstable system. In general most of physical systems, conventional PID control strategies are employed for their stable operation but the dynamics of the system are influenced by input voltage saturation that degrades the performance of the system. The conventional PID control scheme does not work properly alone. In such a situation, PID faces windup phenomenon that leads to instability in the system. To overcome this problem, an anti-windup control scheme leads to stable and smooth operation of active magnetic bearing system. Design/methodology/approach The proposed anti-windup control strategy is based on dynamic output feedback that is applied on linearized active magnetic bearing (AMB) system to stabilize and avoid the input voltage saturation effect in the actuator. Findings An anti-windup controller is designed for active magnetic bearing system in presence of input voltage saturation. The stability of AMB system with anti-windup controller is derived in sense of Lyapunov and expressed as linear matrix inequality problem for AMB system and the designed anti-windup controller also enlarges the region of attraction of considered AMB system. Originality/value T-S fuzzy technique is used for obtaining local linear model of nonlinear active magnetic bearing system for easy and simple implementation of anti-windup control scheme. In proposed methodology the region of attraction for anti-windup compensator is also discussed. The effectiveness of proposed method is verified by the numerical simulation results for considered active magnetic bearing system and domain of attraction or stability region of closed loop AMB system are also calculated using Eigen Value Optimization technique for both the cases such as with and without anti-windup controller. The comparative result and the contribution of proposed control strategy are also discussed.

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Modeling of a Horizontal Active Magnetic Bearing System with Uncertainties in Deterministic Form

Husain

Ahmad

Yatim

2007

First Asia International Conference on Modelling &Amp; Simulation (AMS'07)

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Low order μ-synthesis controller design for a large boiler feed pump equipped with active magnetic bearings

Cited by 6 publications

References 2 publications

Design of backstepping control with CNN-based compensator for active magnetic bearing system subjected to input voltage saturation

Design of backstepping control with CNN-based compensator for active magnetic bearing system subjected to input voltage saturation

An anti-windup control strategy to actuator saturating input voltage for active magnetic bearing system

Modeling of a Horizontal Active Magnetic Bearing System with Uncertainties in Deterministic Form

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