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http://dx.doi.org/10.3795/KSME-A.2010.34.5.605

Isolating Vibration in Miniature Linear Cryogenic Cooler with Tuned Vibration Absorber  

Kim, Young-Keun (Dept. of Mechanical Engineering, KAIST)
Kim, Hong-Bae (Korea Aerospace Research Institute)
Kim, Eung-Hyun (Korea Aerospace Research Institute)
Kim, Kyung-Soo (Dept. of Mechanical Engineering, KAIST)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.5, 2010 , pp. 605-609 More about this Journal
Abstract
In modern surveillance equipment, infrared (IR) sensors are essential for detection and observation. The IR sensor is connected to a miniature cryogenic cooler to maintain the temperature at very low levels, i.e., temperatures as low as 77 K. However, the quality of the image captured by the sensor is degraded by the transmission of vibration disturbances from the cooler. Therefore, to maintain high image quality, the compressor vibration and the force transmitted to the sensor have to be mitigated. For the compressor vibration isolating system, a tuned dynamic vibration absorber, combined with a passive isolator, is proposed. A cryogenic compressor bracket and springs are designed to allow the absorber mass to mitigate the vibration jitter in the axial direction. The system design is analyzed and evaluated in terms of the dynamic suppression of the harmonic force at the operating frequency of the cooler.
Keywords
Cryogenic Cooler; Tuned Vibration Absorber; Stirling Split Cooler;
Citations & Related Records

Times Cited By SCOPUS : 1
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