Refrigeration – Gas compression – heat regeneration and expansion – e.g.,...
Patent
1996-10-30
1998-11-17
Wayner, William E.
Refrigeration
Gas compression, heat regeneration and expansion, e.g.,...
60524, F01B 2908, F25B 900
Patent
active
058361650
ABSTRACT:
An adaptive feedforward vibration control system reduces vibrations at fundamental and harmonic frequencies of matched reciprocating pistons, such as back-to-back compressor pistons in Stirling cycle cryocooler, by driving the pistons with correction signals. The system is also applicable to reducing the vibrations generated by a pair of opposite expander and balancer pistons in a cryocooler. The correction signals are computed iteratively to increase their accuracy, and need only be updated relatively infrequently to adjust the pistons' motions, thereby enabling the use of a relatively slow microprocessor.
REFERENCES:
patent: 5343707 (1994-09-01), Sata
patent: 5392607 (1995-02-01), Wu
patent: 5412951 (1995-05-01), Wu
Champion Shaun L.
Kieffer Michael H.
Wu Yeong-Wei A.
Alkov Leonard A.
Hughes Electronics
Lenzen, Jr. Glenn H.
Schubert William C.
Wayner William E.
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