Application of digital signal processors for industrial magnetic bearings

Bleuler, Hannes; Gähler, Conrad; Herzog, R.; Larsonneur, R.; Mizuno, Takeshi; Siegwart, Roland; Woo, Shao-Ju

doi:10.1109/87.338647

Cited by 61 publications

(25 citation statements)

References 14 publications

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“…From Figure 5 we observe the nonlinear tracking controllers provide robust stabilization. They perform as well or better than PID which is often used for stabilization of high speed AMB applications [18]. Figure 6 shows representative data for the associated currents and voltages at 14000 rpm.…”

Section: Methodsmentioning

confidence: 98%

Nonlinear control of an active magnetic bearing with bias currents: experimental study

Grochmal

Lynch

2006

2006 American Control Conference

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This paper presents an experimental comparison of position tracking controllers for a five degree-of-freedom active magnetic bearing system. Two variations of a nonlinear design are presented, each subject to a different actuating constraint: Constant Current Sum (CCS) uses bias currents and Current Almost Complementary (CAC) avoids bias currents. While both designs achieve accurate tracking for a non-rotating shaft, a comparison of unbalance responses show that voltage saturation can limit the dynamic response of the CAC-based design. Performance of the nonlinear designs is also compared to a decentralized PID controller.

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Section: Methodsmentioning

confidence: 98%

Nonlinear control of an active magnetic bearing with bias currents: experimental study

Grochmal

Lynch

2006

2006 American Control Conference

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“…The considered control problem can be viewed as a more general case of magnetic levitation, which has been extensively investigated and applied for a wide range of practical problems from high-speed transportation (Maglev) to clean room applications in the semiconductor industry [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A simple approach to electromagnetic actuator control based on asymptotically exact linearization

Forrai

Ueda

Yumura

2005

Archive of Applied Mechanics

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This paper deals with system identification and robust control of a nonlinear electromagnetic actuator and proposes a simple, robust, and easy-to-implement compensation law for linearization, known as asymptotically exact linearization. There are many practical applications where this type of electromagnetic actuator is used: electromagnetic valve actuators of combustion engines, artificial heart actuators, electromagnetic brakes, etc. The investigated system is open-loop unstable and nonlinear and has a restricted equilibrium region. System identification experiments are presented with an emphasis on the design procedure of an H ∞ controller. The experimental results demonstrate that the controller design problem can be successfully handled within the framework of robust control. This paper reflects a rather pragmatic control approach and, although it does not introduce novel control strategies, might be valuable reading for practicing engineers.

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“…The active magnetic bearing (AMB) is an established industrial technology with a rapidly growing number of applications. A good example of the application of magnetic bearings in the machine tool industry can be found in (Bleuler et al, 1994). AMB can be used to apply a synchronous force to the shaft to control the imbalance response, either to cancel the force transmitted to the base or to compensate for the vibration displacement of the shaft.…”

Section: Davc For Rotating Machinerymentioning

confidence: 99%