Hybrid isolation of micro vibrations induced by reaction wheels

Lee, Dae-Oen; Park, Geeyong; Han, Jae‐Hung

doi:10.1016/j.jsv.2015.10.023

Cited by 54 publications

(24 citation statements)

References 26 publications

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“…Over the years, a wide variety [9] of microvibration isolation systems have been developed or proposed in an effort to tackle this problem. Most of them focus on mechanical isolation of the noisy equipment and/or of the sensitive payload from the rest of the spacecraft structure [11][12][13][14][15][16][17]. For some observation missions, active and adaptive optics [18][19][20] are a promising technology to perform wavefront correction and improve pointing stability at the payload level.…”

Section: Background and Motivationmentioning

confidence: 99%

“…The dynamical equations of the second PMA are almost completely similar to eqs. (13)- (15), except for changes in each of the indices (for example  1 becomes  2 and u{1} becomes u{2}).…”

Section: Analytical Modelingmentioning

confidence: 99%

“…An equivalent representation of the same dynamical model can be deduced by combining each of the subsystem LFTs from eqs. (10) to (12) and (15) into the following global LFT representation:…”

Section: Analytical Modelingmentioning

confidence: 99%

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Robust and adaptable dynamic response reshaping of flexible structures

Preda

Sanfedino

Bennani

et al. 2020

Journal of Sound and Vibration

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This paper outlines a complete methodology for designing a control system that reshapes the dynamic response of the flexible structure to robustly match the dynamics of a given adaptable reference model. The procedure was experimentally verified on a setup developed at the European Space Agency, consisting of a cantilevered flexible plate actuated by two shakers. Angular displacements at the free tip of the plate were measured with sub-microradian resolution using a laser autocollimator. Following a comprehensive system identification phase, mathematical models of the uncertain plant were extracted. The models reliably fit the experimental data and were used to synthesize a low order and high bandwidth structured Linear Parameter Varying controller. The controller was designed by taking into account the limits of achievable performance and the closed loop effectively constrained the flexible structure to behave like it was made out of an adaptable material. The robust stability and worst case performances were assessed by means of a structured singular value analysis and excellent agreement between theoretical predictions and experimental results was observed.

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Section: Background and Motivationmentioning

confidence: 99%

Section: Analytical Modelingmentioning

confidence: 99%

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Robust and adaptable dynamic response reshaping of flexible structures

Preda

Sanfedino

Bennani

et al. 2020

Journal of Sound and Vibration

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“…Wei et al (2015) proposed a vibration isolation platform by connecting four identical zig-zag beams symmetrically to a circular plate. Lee et al (2016) experimentally studied the Stewart platform formed by multi hybrid vibration isolators. Wang et al (2016) experimentally and numerically studied a passive and active hybrid isolation system constructed with springs, oil-filled corrugated pipes, and an inertial actuator.…”

Section: Introductionmentioning

confidence: 99%

Design of micro-vibration isolation system for a remote-sensing satellite payload using viscoelastic materials

Safarabadi¹,

Haghshenas²,

Kelardeh³

2020

10.5267/j.esm

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“…The isolation performance in microgravity environment can achieve 10-30 dB attenuation of acceleration on the band of 0.1-300 Hz. 26 Lee et al 27,28 investigated a hybrid isolator of bellows and viscous fluid; the experimental results showed that the passive isolator can achieve a high roll-off rate of about À40 dB/dec, and the amplification at the resonance frequency is about 6.5 dB.…”

Section: Introductionmentioning

confidence: 99%

Performance of a low-frequency hybrid vibration isolation platform for vibration-sensitive devices

Xie

Diao

et al. 2018

Journal of Low Frequency Noise, Vibration and Active Control

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For preventing the fragile optical communication devices from malfunction caused by the low-frequency seismic excitation, a novel three-dimensional hybrid isolation platform is proposed in this paper. To isolate the horizontal and vertical vibrations simultaneously, the platform is designed as a combination of a rolling isolation system and four threeparameter isolators with active damping. By deriving the governing equations of the three-parameter isolators and the profile of the concave rolling surface, the dynamic model of the whole platform is constructed. Numerical results indicate that the isolation platform has an effective suppression of the horizontal and vertical vibrations. To verify the isolation performance of the hybrid isolation platform, an experiment is conducted in the targeting frequency range. Compared to the amplification factor of 6.2 dB of the three-parameter isolator, the test results exhibit that the hybrid isolation shows no amplification effect in the vertical direction, and the root mean square value of acceleration responses can be decreased by more than 65% in the frequency range of 0-32 Hz. In the horizontal direction, the reduction of the root mean square value of acceleration responses is up to 85% in the same frequency range.

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Hybrid isolation of micro vibrations induced by reaction wheels

Cited by 54 publications

References 26 publications

Robust and adaptable dynamic response reshaping of flexible structures

Robust and adaptable dynamic response reshaping of flexible structures

Design of micro-vibration isolation system for a remote-sensing satellite payload using viscoelastic materials

Performance of a low-frequency hybrid vibration isolation platform for vibration-sensitive devices

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