Multimodal tuned dynamic absorber for split Stirling linear cryocooler

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Veprik, A.^1 ; Tuito, A.^2

SemiConductor Devices, POB 2250, Haifa

31021, Israel^1

Israel Ministry of Defense, Kirya, Tel Aviv

64734, Israel^2

关键词: Driving frequencies;    Dynamic absorber;    Dynamic reactions;    Expander unit;    Piston compressor;    Sensitive application;    Side by sides;    Transfer lines;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012066/pdf
DOI  :  10.1088/1757-899X/171/1/012066

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Forthcoming low size, weight, power and price split Stirling linear cryocoolers may rely on electro-dynamically driven single-piston compressors and pneumatically driven expanders interconnected by the configurable transfer line. For compactness, compressor and expander units may be placed in a side-by-side manner, thus producing tonal vibration export comprising force and moment components. 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 (MTDA), having one translational and two tilting modes essentially tuned to the driving frequency. The dynamic reactions (force and moment) produced by such a MTDA are simultaneously counterbalancing force and moment vibration export produced by the cryocooler. The authors reveal the design details, the method of fine modal tuning and outcomes of numerical simulation on attainable performance.