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首页> 外文会议>Proceedings of ESMATS 2011: 14th European space mechanisms and tribology symposium.;Proceedings of ESMATS 2011: 14th European space mechanisms and tribology symposium. >DEVELOPMENT OF A TWO HINGE SHUTTER AND CALIBRATION MECHANISM
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DEVELOPMENT OF A TWO HINGE SHUTTER AND CALIBRATION MECHANISM

机译：两种铰接式快门的开发和校准机制

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Shutter mechanisms are typical for scientific opticalrninstruments. Independent from the specific missionrnrequirements typical design drivers are the repeatabilityrnand reliability, cleanliness, light tightness of the hinges,rnthermal distortion and the redundancy and fail safernconcept. All these items have been solved in the framernof the EnMAP Full Aperture Diffuser (FAD)rndevelopment, a cooperation project with HTS Coswig.rnThe mechanism consists of a Spectralon diffuser platernwhich is suspended in an aluminium hatch framerndesigned to keep thermal stresses and distortion to arnminimum. The hatch is mounted on a titan pivot andrncan be moved by a brushless DC motor with arnplanetary gear head. In case of failure the specialrncoupler and a preloaded spring allow removing thernhatch and the frame out of the light path. A secondrnhatch which is directly driven by an identical actuatorrnprotects the diffuser plate from sunlight in the storedrnposition. This becomes necessary since the Spectralonrnis very sensitive to degradation under sunlight.rnFrangibolt release systems from Tini-Aerospace arernused for locking the hatches during launch and for thernfail safe mechanism. Further the mechanism has bafflesrnon the back of the hatches and the walls whereverrnpossible. The mechanism is equipped withrnpotentiometers for the angular position of each hatch,rnend position and release sensors as well as emergencyrnheaters and temperature sensors.rnThis paper presents the special features of therndeveloped mechanism: the thermal suspension of thernSpectralon plate, the fail safe mechanism of the hingernas well as the fail safe separation mechanism betweenrnthe actuator and the potentiometer.
机译：快门机制是科学光学仪器的典型代表。独立于特定任务要求的典型设计驱动因素是可重复性和可靠性，清洁度，铰链的光密性，热变形以及冗余和故障安全概念。与HTS Coswig合作的EnMAP全孔径扩散器（FAD）开发的框架中解决了所有这些问题。该机制由Spectralon扩散器板组成，该板悬挂在铝制舱口框架中，旨在保持热应力和变形到最小。舱口安装在钛合金枢轴上，可通过带有行星齿轮头的无刷直流电动机移动。万一发生故障，特殊的耦合器和预加载的弹簧可以将光栅和框架从光路中移出。由相同的致动器直接驱动的第二个舱口盖可防止扩散板在存放位置受到日光的影响。这是必要的，因为Spectralonrnis对日光下的降解非常敏感。来自Tini-Aerospace的Frangibolt释放系统被用于在发射过程中锁定舱口并确保失效机制。此外，该机构在可能的地方在舱口的后面和墙壁上设有挡板。该机构配备有电位计，用于测量每个舱口的角度位置，倾向位置和释放传感器以及应急加热器和温度传感器。本文介绍了已开发机构的特殊功能：Spectralon板的热悬挂，铰链的故障安全机制。以及执行器和电位计之间的故障安全分离机制。

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