Multimodal tuned dynamic absorber for split Stirling linear cryocooler

Alexander Veprik; Avi Tuito

doi:10.1117/12.2228430

17 May 2016 Multimodal tuned dynamic absorber for split Stirling linear cryocooler

Alexander Veprik, Avi Tuito

Proceedings Volume 9821, Tri-Technology Device Refrigeration (TTDR); 98210E (2016) https://doi.org/10.1117/12.2228430
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

Low size, weight, power and price split Stirling linear cryocooler usually comprises electro-dynamically driven compressor and pneumatically driven expander which are side-by-side fixedly mounted upon the common frame and interconnected by the configurable transfer line. Vibration export produced by such a cryocooler comprises of a pair of tonal forces, the frequency of which essentially equals fixed driving frequency. In vibration sensitive applications, this may result in excessive angular line of sight jitter and translational defocusing affecting the image quality. The authors present Multimodal Tuned Dynamic Absorber, having one translational and two tilting modes essentially tuned to the driving frequency. Dynamic analysis shows that the dynamic reactions (force and moment) produced by such a dynamic absorber are capable of simultaneous attenuation of translational and tilting components of cryocooler induced vibration. The authors reveal the preferable design, the method of fine tuning and outcomes of numerical simulation on attainable performance.

Citation Download Citation

Alexander Veprik and Avi Tuito "Multimodal tuned dynamic absorber for split Stirling linear cryocooler", Proc. SPIE 9821, Tri-Technology Device Refrigeration (TTDR), 98210E (17 May 2016); https://doi.org/10.1117/12.2228430

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