8 January 2008 A novel vibration control system for Stirling cryocoolers
Author Affiliations +
Abstract
Vibration generated by mechanical cryocoolers has long been identified as a critical issue for space infrared application, for it can degrade the resolution and pointing accuracy of precision instruments. A simple and effective vibration control system based on momentum cancellation has been developed to actively attenuate the vibration of our Stirling cryocooler. The cryocooler expander module consists of a displacer and an electromagnetically driven actuator, which are mechanically placed in a back-to-back configuration. The transfer function of actuator has been solved, based on that result, novel analogue control electronics has been designed to modulate the displacer displacement signal and drive the actuator, so the moving parts of actuator and displacer can move in opposite direction to reduce the vibration force. With this system, the fundamental vibration of expander is reduced by a factor of more than 40 dB without exaggerating other harmonic components; the power consumption is only less than 0.5W without control electronics. The system has achieved the general vibration requirement of space application and has been applied to our products.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Baoyu Yang, Baoyu Yang, Yinong Wu, Yinong Wu, Yajie Tang, Yajie Tang, Hua Fu, Hua Fu, Guohua Lu, Guohua Lu, Guilin Chen, Guilin Chen, } "A novel vibration control system for Stirling cryocoolers", Proc. SPIE 6835, Infrared Materials, Devices, and Applications, 68350E (8 January 2008); doi: 10.1117/12.756684; https://doi.org/10.1117/12.756684
PROCEEDINGS
11 PAGES


SHARE
Back to Top