Active vibration control of flexible structures with acceleration feedback

Sim, Eun-Sup; Lee, Sung W.

doi:10.2514/3.21025

Cited by 45 publications

(16 citation statements)

References 4 publications

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“…It can be seen that the filter in (5a) has a gain at and is approximately equivalent in the pass band to that in (4). The same control effect as that achieved with the filter in (5a) can also be achieved if the equipment acceleration is fed back through a second-order low-pass filter instead, given by [6] (5b) which is called acceleration-position feedback (APF) control in this paper. Because acceleration is usually measured in practice it can be seen that the electrical dynamic absorber can be implemented simply by using a low-pass filter.…”

Section: A Control Methodsmentioning

confidence: 83%

“…The first description is readily available from the solution to (1). The second description, the transmissibility, can be determined after some algebraic manipulation of (1) to give (6) Because this is independent of the base dynamics it can give some insight into the control concept. If DVFB control is applied, (4) can be substituted into (6) to reveal that the electrical filter works as a sky-hook damper attached to the equipment [3].…”

Section: B Analysis Of Performancementioning

confidence: 99%

“…Examples of electrical dynamic absorbers include collocated acceleration feedback controllers [6], [7] and shunt circuits using piezoelectric or electromagnetic actuators [8], [9], where the former are active absorbers requiring external power sources while the latter are passive. Although the authors of [6] and [7] did not mention it explicitly, they employed the principle of the dynamic absorber.…”

Section: Introductionmentioning

confidence: 99%

“…Although the authors of [6] and [7] did not mention it explicitly, they employed the principle of the dynamic absorber. These active and passive electrical absorbers are equivalent to mechanical absorbers and thus in theory always stable.…”

Section: Introductionmentioning

confidence: 99%

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Active Vibration Isolation Using an Electrical Damper or an Electrical Dynamic Absorber

Kim

Pietrzko

Brennan

2008

IEEE Trans. Contr. Syst. Technol.

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Abstract-This paper describes a theoretical and experimental study to show how an electrical damper or an electrical dynamic absorber, implemented using an electromagnetic actuator and an accelerometer, can control vibration transmission through a vibration isolator. The electrical damper is realized by feeding back the equipment velocity to the actuator with constant gain. The electrical dynamic absorber is realized by feeding back the equipment acceleration through a second-order low-pass filter. Because it is found that the plant on a flexible base is asymptotically similar to that on a rigid base, the optimal parameters of the control filter are determined analytically, independent of the base dynamics. Experimental results show that the electrical dynamic absorber has a similar performance to the electrical damper. The maximum reduction in transmitted vibration achieved was about 38 dB for both methods. It is also shown that the electrical dynamic absorber is more robust to undesirable dynamics outside the control bandwidth. Another advantage of the electrical dynamic absorber is that it does not require an integrator to transform acceleration into velocity.Index Terms-Acceleration-position feedback (APF), direct velocity feedback (DVFB), electrical damper, electrical dynamic absorber, vibration control.

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Section: A Control Methodsmentioning

confidence: 83%

Section: B Analysis Of Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Active Vibration Isolation Using an Electrical Damper or an Electrical Dynamic Absorber

Kim

Pietrzko

Brennan

2008

IEEE Trans. Contr. Syst. Technol.

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“…The system wrench includes all the Coriolis, centrifugal, and gravity forces. Moreover, the vectors , , and are given by (15) where , , and are the vectors of the micromanipulator joint variables and joint-actuation torques, and the -dimensional zero vector, respectively, being the number of the micromanipulator joints.…”

Section: Dynamics Equationsmentioning

confidence: 99%

Estimation of the flexural states of a macro-micro manipulator using point-acceleration data

2005

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Hybrid feedback‐feedforward control for vibration suppression

Man

Preumont

1996

J. Struct. Control

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This paper evaluates a hybrid feedback-feedforward controller for vibration suppression. The synergy between the two types of controllers is pointed out. The feedforward control extends the bandwidth of the controller for steady state disturbances with a correlated reference, while the feedback control reduces drastically the impulse response of lightly damped structures, avoiding the problems associated with truncation. The hybrid controller does not require additional actuator and sensor. Two applications are presented in the area of vibration attenuation and precision pointing. In each case the theoretical advantage of the hybrid controller is confirmed by experiments.

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Active vibration control of flexible structures with acceleration feedback

Cited by 45 publications

References 4 publications

Active Vibration Isolation Using an Electrical Damper or an Electrical Dynamic Absorber

Active Vibration Isolation Using an Electrical Damper or an Electrical Dynamic Absorber

Estimation of the flexural states of a macro-micro manipulator using point-acceleration data

Hybrid feedback‐feedforward control for vibration suppression

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