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Proceedings Paper

Multi-axis vibration cancellation for Stirling cryocoolers
Author(s): Simon A. Collins; James D. Paduano; Andreas H. von Flotow
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Paper Abstract

This paper describes an active multi-axis vibration cancellation system designed for the expander of a Hughes split Stirling cryocooler. The axial force and the two lateral torques generated by the expander are cancelled by an active counterbalance driven by electrodynamic forcing elements. The counterbalance drive signals are generated by an narrowband adaptive feedforward controller; load cells provide the error signals. Multi-axis cancellation results are presented in which 30 dB of cancellation was achieved at the first five axial harmonics while simultaneously the fundamental harmonic of both lateral torques was reduced by 20 dB. The system demonstrates that effective multi-axis cancellation can be implemented with compact hardware and simple analog electronics.

Paper Details

Date Published: 23 June 1994
PDF: 11 pages
Proc. SPIE 2227, Cryogenic Optical Systems and Instruments VI, (23 June 1994); doi: 10.1117/12.178599
Show Author Affiliations
Simon A. Collins, Massachusetts Institute of Technology (United States)
James D. Paduano, Massachusetts Institute of Technology (United States)
Andreas H. von Flotow, Hood Technology Corp. (United States)

Published in SPIE Proceedings Vol. 2227:
Cryogenic Optical Systems and Instruments VI
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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