A six degrees of freedom active isolator based on ...

Avraam, M.; Marneffe, Bruno De; Romanescu, Iulian Ilie; Horodincă, Mihăiţă; Deraemaeker, Arnaud; Preumont, André

doi:10.2514/6.iac-05-c2.2.01

Cited by 2 publications

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“…It provides a measure of the quality of the collected data. Single-axis transmissibilities measured along the horizontal axes are very similar to those measured along the vertical axes [20]. Figure 18 shows the Fröbenius norm Γ(ω), as defined by (26), and calculated from the measurements of the 12 regular accelerometers.…”

Section: Resultsmentioning

confidence: 62%

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A six-axis single-stage active vibration isolator based on Stewart platform

Preumont¹,

Horodincă²,

Romanescu³

et al. 2007

Journal of Sound and Vibration

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This paper reports on a six-axis vibration isolator for space applications. It is divided into three parts. The first part recalls the principles of active isolation and summarizes the main theoretical results for multiple-axis decentralized control based on force feedback. The second part discusses the technology and describes the evolution of the design over the five years of this project. The third part is devoted to the identification of the transmissibility matrix and the performance evaluation. Zero-gravity tests in parabolic flight are reported. The isolator is proved efficient in a frequency band between 5 Hz and 400 Hz, with a maximum attenuation of-40 dB between 50 Hz and 200 Hz.

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Section: Resultsmentioning

confidence: 62%

“…(in practice, a singular value decomposition is used, and singular values smaller than a tolerance are treated as zero and deleted in the calculation of the pseudo-inverse). Once T(ω) has been estimated, the transmissibility in generalized coordinates, T * (ω), can be computed by (20).…”

Section: Identification Of the Transmissibilitymentioning

confidence: 99%