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Protoflight Spacecraft Cryocooler Performance Results

  • Kenneth Price
  • John Reilly
  • Nandu Abhyankar
  • Ben Tomlinson
Chapter
  • 1.2k Downloads

Abstract

The Protoflight Spacecraft Cryocooler (PSC) is a flight-qualified Stirling cryocooler that delivers 1.2 W refrigeration at 35 K and 3 W refrigeration at 60 K. This Oxford-class unit employs three finger tangential flexures in the compressor module. These flexures have been shown to provide smoother, lower vibration piston motion than previously obtained with conventional three finger spiral flexures. Acceptance Tests validated the required performance capabilities and Qualification Tests validated the cooler for flight. Acceptance Tests included performance mapping at rejection temperatures from 275 K to 325 K, residual vibration measurements for each module, temperature stability under various conditions, cold tip motion, cold tip side load capacity. Qualification Tests included three-axis random vibration, thermal cycling, hermeticity and EMI/EMC tests. The 12.5 kg cooler was delivered with a brassboard command and control module that provides simultaneous temperature and Adaptive Feed-Forward vibration control. The PSC with brassboard electronics have been delivered to the Air Force Research Lab in Albuquerque, where additional testing has validated the results obtained at Raytheon.

Keywords

Thermal Interface Residual Vibration Thermodynamic Performance Compressor Motor Thermal Interface Contact Resistance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Rererences

  1. 1.
    Price, K.D., Barr, M.C. and Kramer, G., “Prototype Spacecraft Cryocooler Progress,” Cryocoolers 9, Plenum Press, New York (1997), pp. 29–34.Google Scholar
  2. 2.
    65 K Standard Spacecraft Cryocooler Program Final Report, Contract #F29601-89-C-0082, Hughes Aircraft Company, Electro-Optical Systems, El Segundo, CA, November 1995.Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Kenneth Price
    • 1
  • John Reilly
    • 2
  • Nandu Abhyankar
    • 2
  • Ben Tomlinson
    • 2
  1. 1.Raytheon Systems CompanyEl SegundoUSA
  2. 2.Air Force Research LaboratoryAlbuquerqueUSA

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