Active Local Vibration Isolation Applied to a Flexible Space Telescope

Kaplow, C.E.; Velman, J.

doi:10.2514/3.55976

Cited by 41 publications

(16 citation statements)

References 2 publications

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“…Active vibration isolation aims at improving the performance of the vibration isolation by including a force generating element in the isolation interface, a sensor at the receiving end of the transmission path, and a feedback control law connecting them. The celebrated sky-hook damper [3,4] is a single-stage interface which allows one to combine a À40 dB=decade attenuation rate at high frequency with a critical damping (no overshoot) at resonance.…”

Section: Introductionmentioning

confidence: 99%

Force Feedback Versus Acceleration Feedback in Active Vibration Isolation

Preumont¹,

François²,

Bossens³

et al. 2002

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 99%

Force Feedback Versus Acceleration Feedback in Active Vibration Isolation

Preumont¹,

François²,

Bossens³

et al. 2002

Journal of Sound and Vibration

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“…This would amount to a passive suspension with frequency dependent damping properties leading to high damping up to the corner frequency, and then very low damping. The celebrated 'sky-hook' damper achieves just that with a feedback proportional to the absolute velocity of the sprung mass (Karnopp and Trikha 1969, Kaplow and Velman 1980, Karnopp 1990). An alternative implementation with enhanced robustness has also been proposed (Preumont et al 2002).…”

Section: Semiactive Suspensionmentioning

confidence: 98%

An investigation of a semiactive suspension for a fork lift truck

Man¹,

Lemerle²,

Mistrot³

et al. 2005

Vehicle System Dynamics

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This paper investigates the feasibility of a semiactive suspension of the cabin of a fork lift truck as a way of reducing the effect of harmful vibrations on the health of truck drivers. A suspension based on MR fluid dampers has been designed and implemented on an actual vehicle and heuristic control strategy has been developed, which preserves the filtering properties of the passive suspension when the vehicle moves in a straight line with a constant velocity and suppresses the large amplitude pitch and roll motion during turns and braking. Field tests have demonstrated a substantial comfort improvement with respect to the passive suspension, during the braking and turning phases, without any noticeable detrimental effects.

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“…However, when n 2 , increasing ȟ will increase the transmissibility amplitude and the asymptotic decay rate, which deteriorates from í40 dB/dec to í20 dB/dec. In order to solve this conflict, a simple feedback control strategy, a skyhook damper [33] …”

Section: Controller Designmentioning

confidence: 99%

Design and experiments of an active isolator for satellite micro-vibration

Zhou

Zheng

et al. 2014

Chinese Journal of Aeronautics

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In this paper, a soft active isolator (SAI) derived from a voice coil motor is studied to determine its abilities as a micro-vibration isolation device for sensitive satellite payloads. Firstly, the two most important parts of the SAI, the mechanical unit and the low-noise driver, are designed and manufactured. Then, a rigid-flexible coupling dynamic model of the SAI is built, and a dynamic analysis is conducted.Furthermore, a controller with a sky-hook damper is designed. Finally, results from the performance tests of the mechanical/electronic parts and the isolation experiments are presented. The SAI attenuations are found to be more than í20 dB above 5 Hz, and the control effect is stable.

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Active Local Vibration Isolation Applied to a Flexible Space Telescope

Cited by 41 publications

References 2 publications

Force Feedback Versus Acceleration Feedback in Active Vibration Isolation

Force Feedback Versus Acceleration Feedback in Active Vibration Isolation

An investigation of a semiactive suspension for a fork lift truck

Design and experiments of an active isolator for satellite micro-vibration

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