24 June 2014 Adaptive vibration reduction on dual-opposed piston free displacer Stirling cooler
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Abstract
In a Stirling-type pulse-tube cooler with a dual-opposed piston compressor, the residual vibration exported by the cooler is primarily a result of residual imbalances between compressor motors. Using an electronic feedback loop [1] and driving compressor motors in a master-slave configuration, the exported force from the compressor can be regulated to negligible levels. This has been demonstrated in a multitude of commercial applications [2] as well as in space applications. In a novel application of the same electronic feedback technology, the residual exported forces resulting from the motion of the free moving displacer of a Stirling cold finger are compensated, by using the linear dual-opposed piston compressor as an active balancer. Theoretical analysis of this is provided, measurements are presented on different cooler types, and the effect of integration aspects - hard mount versus suspended – is discussed. The effect on exported vibration as well as power efficiency is discussed and compared between Stirling and pulse-tube type coolers. Currently available off-the-shelf hardware, the CDE7232, is presented and future developments are discussed.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. Arts, B. de Bruin, D. Willems, G. de Jonge, A. Benschop, "Adaptive vibration reduction on dual-opposed piston free displacer Stirling cooler", Proc. SPIE 9070, Infrared Technology and Applications XL, 90702M (24 June 2014); doi: 10.1117/12.2049686; https://doi.org/10.1117/12.2049686
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