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A 2-collinear-DoF strut with embedded negative-resistance electromagnetic shunt dampers for spacecraft micro-vibration

Stabile, Alessandro, Aglietti, Guglielmo, Richardson, G and Smet, G (2017) A 2-collinear-DoF strut with embedded negative-resistance electromagnetic shunt dampers for spacecraft micro-vibration Smart Materials and Structures, 26 (4), 045031.

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Abstract

Micro-vibration on board a spacecraft is an important issue that affects payloads requiring high pointing accuracy. Although isolators have been extensively studied and implemented to tackle this issue, their application is far from being ideal due to the several drawbacks that they present, such as limited low-frequency attenuation for passive systems or high power consumption and reliability issues for active systems. In the present study, a novel 2-collinear-DoF strut with embedded electromagnetic shunt dampers (EMSD) is modelled, analysed and the concept is physically tested. The combination of high-inductance components and negative-resistance circuits is used in the two shunt circuits to improve the EMSD micro-vibration mitigation and to achieve an overall strut damping performance that is characterised by the elimination of the resonance peaks and a remarkable FRF final decay rate of −80 dB dec–1. The EMSD operates without requiring any control algorithm and can be comfortably integrated on a satellite due to the low power required, the simplified electronics and the small mass. This work demonstrates, both analytically and experimentally, that the proposed strut is capable of producing better isolation performance than other well-established damping solutions over the whole temperature range of interest.

Item Type: Article
Subjects : Electronic Engineering
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Stabile, Alessandroa.stabile@surrey.ac.ukUNSPECIFIED
Aglietti, Guglielmog.aglietti@surrey.ac.ukUNSPECIFIED
Richardson, GUNSPECIFIEDUNSPECIFIED
Smet, GUNSPECIFIEDUNSPECIFIED
Date : 20 March 2017
Identification Number : 10.1088/1361-665X/aa61e3
Copyright Disclaimer : © 2017 IOP Publishing Ltd
Uncontrolled Keywords : electromagnetic shunt damper, semi-active isolator, micro-vibration isolation
Depositing User : Symplectic Elements
Date Deposited : 21 Mar 2017 17:39
Last Modified : 19 Jul 2017 13:31
URI: http://epubs.surrey.ac.uk/id/eprint/813816

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