Title :
A soft 6-axis active vibration isolator
Author :
Spanos, J. ; Rahman, Z. ; Blackwood, G.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
The paper presents analytical and experimental results with a 6-axis actively controlled vibration isolator. The isolator was designed to attenuate vibrations from reaction wheels, cryogenic coolers and other noisy machines located on board precision optical-class spacecraft. It consists of six active struts each of which includes an electromagnetic voice coil actuator in parallel with a soft spring. Six decoupled analog controllers were used to close broadband feedback loops around six force sensors and the isolator multi-axis transmissibility was measured with twelve accelerometers (six on the noisy side and six on the quite side). Experimental results show a ten-fold improvement in performance over passive isolation alone
Keywords :
actuators; aerospace control; closed loop systems; feedback; space vehicles; vibration control; 6-axis active vibration isolator; broadband feedback; closed loop system; cryogenic coolers; decoupled analog controllers; electromagnetic voice coil actuator; optical-class spacecraft; reaction wheels; soft spring; Cryogenics; Isolators; Optical attenuators; Optical design; Optical feedback; Optical noise; Optical sensors; Space vehicles; Vibration control; Wheels;
Conference_Titel :
American Control Conference, Proceedings of the 1995
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2445-5
DOI :
10.1109/ACC.1995.529280
