FLEXURE PIVOT FOR AEROSPACE MECHANISMS
FLEXURE PIVOT FOR AEROSPACE MECHANISMS
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发表时间：
2007
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通讯作者：
S. Henein;P. Spanoudakis;S. Droz;I. Myklebust;E. Onillon;Suisse d'Electronique
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作者：
S. Henein;P. Spanoudakis;S. Droz;I. Myklebust;E. Onillon;Suisse d'Electronique
描述了一种专用于指向和扫描空间机构的通用高精度柔性枢轴。典型的应用是有效载荷科学仪器和卫星间通信系统。这项工作首先全面分析了目前和未来的市场和特派团的需要。该调查用于根据移动质量、惯性、尺寸、角冲程等定义基线枢轴概念的要求。建立了一个全面的解决方案目录，并进行权衡，以选择一个原始的概念。对该概念进行了详细设计，并通过电火花加工在专用试验台上进行了表征。所提出的设计的主要特点是其非常小的寄生中心平移：在±10°的运动范围内小于2 μ m的离轴位移（这比相同尺寸的经典十字弹簧枢轴小65倍）。在±10°行程内，分辨率优于50µrad。疲劳试验表明，轴可承受±7.5°行程超过140万次而不失效。
A generic high precision flexible pivot dedicated to pointing and scanning space mechanisms is described. Typical applications are payload scientific instruments and inter-satellite communication systems. The work started with a comprehensive analysis of the present and future market and mission needs. This survey was used to define requirements for a baseline pivot concept in terms of mobile mass, inertias, size, angular strokes, etc. A comprehensive solution catalogue was established and traded-off to select an original concept. This concept was designed in detail and manufactured by wire electro-discharge machining for characterization on special test benches. The main characteristic of the proposed design is its very small parasitic center translation : less than 2 µm off axis shift over a ±10° motion range (which is 65 times less than a classical cross spring pivot of the same size). Resolution better than 50 µrad was achieved over a ± 10° stroke. Fatigue tests show that the pivots can endure more than 1.4 million cycles of ± 7.5° stroke without failure.