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Title: System and method of active vibration control for an electro-mechanically cooled device

A system and method of active vibration control of an electro-mechanically cooled device is disclosed. A cryogenic cooling system is located within an environment. The cooling system is characterized by a vibration transfer function, which requires vibration transfer function coefficients. A vibration controller generates the vibration transfer function coefficients in response to various triggering events. The environments may differ by mounting apparatus, by proximity to vibration generating devices, or by temperature. The triggering event may be powering on the cooling system, reaching an operating temperature, or a reset action. A counterbalance responds to a drive signal generated by the vibration controller, based on the vibration signal and the vibration transfer function, which adjusts vibrations. The method first places a cryogenic cooling system within a first environment and then generates a first set of vibration transfer function coefficients, for a vibration transfer function of the cooling system. Next, the cryogenic cooling system is placed within a second environment and a second set of vibration transfer function coefficients are generated. Then, a counterbalance is driven, based on the vibration transfer function, to reduce vibrations received by a vibration sensitive element.
Inventors:
 [1];  [2];  [3]
  1. (Hayward, CA)
  2. (Livermore, CA)
  3. (Mountain View, CA)
Issue Date:
OSTI Identifier:
873301
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 6131394
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
method; active; vibration; control; electro-mechanically; cooled; device; disclosed; cryogenic; cooling; located; environment; characterized; transfer; function; requires; coefficients; controller; generates; response; various; triggering; events; environments; mounting; apparatus; proximity; generating; devices; temperature; event; powering; reaching; operating; reset; action; counterbalance; responds; drive; signal; generated; based; adjusts; vibrations; set; placed; driven; reduce; received; sensitive; element; cryogenic cooling; transfer function; operating temperature; signal generated; mounting apparatus; vibration signal; sensitive element; generating device; drive signal; vibration control; electro-mechanically cooled; generating devices; active vibration; cooled device; /62/