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http://dx.doi.org/10.5139/JKSAS.2018.46.7.575

Validation of Structural Safety on Multi-layered Blade-type Vibration Isolator for Cryocooler under Launch Vibration Environment  

Jeon, Young-Hyeon (Department of Aerospace Engineering, Chosun University)
Ko, Dai-Ho (Hanwha Systems)
Jo, Mun-Shin (Korea Aerospace Research Institute)
Oh, Hyun-Ung (Department of Aerospace Engineering, Chosun University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.46, no.7, 2018 , pp. 575-582 More about this Journal
Abstract
The spaceborne cooler is applied to cool down of the focal plane of the infrared detector of the observation satellite. However, this cooler induces unnecessary micro-jitter which can degrade the image quality of the high-resolution observation satellite. In this study, we proposed a multi-layered blade type vibration isolator to attenuate micro-vibration generated from a spaceborne cooler, while assuring structural safety of the cooler under severe launch loads without an additional launch-lock device. The blade of the isolator is formed with multi-layers in order to obtain durability against fatigue failure and an adhesive is applied between each layers for granting high damping capability under launch vibration environment. In this study, the basic characteristics of the isolator were measured using the free-vibration test. The effectiveness of the isolator design was demonstrated by launch vibration test at qualification level.
Keywords
Spaceborne Cooler; Vibration Isolator; Launch Vibration; Structural Safety; Multi-layered Blade; Viscoelasticity;
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