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首页> 外文会议>Conference on Gravitational-Wave Detection, Aug 23-25, 2002, Waikoloa, Hawaii, USA >Development of hardware for a drag-free control system
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Development of hardware for a drag-free control system

机译：无拖曳控制系统的硬件开发

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Space-borne gravitational wave missions like LISA require Drag-Free Control (DFC) systems to control the motion of a constellation of spacecraft to high positional accuracy so that Michelson interferometers of vast scales can be implemented and used to detect gravitational waves. The spacecraft will continually experience forces and torques due to external disturbances, resulting in positional perturbations. Therefore the development of a DFC system is essential to stabilize the spacecraft to a specified tolerance. Prior to such space-borne gravitational wave missions, a technology demonstrator mission, such as the proposed ODIE, ELITE or SMART-2, is needed to test the feasibility of drag-free spacecraft technology. This paper discusses the requirements of the hardware (i.e. accelerometers, thrusters) needed to implement a DFC system. Control-loop models have been developed to model the DFC system's dynamic behavior, which enabled quantification of its performance. Results show that if an accelerometer noise level of 1x10~(-12) m·Hz~(-0.5) and thruster noise level of 1x10~(-8) N·Hz~(-0.5) can be realized then the ODIE acceleration budget can easily be met.
机译：像LISA之类的星载重力波任务需要无阻力控制（DFC）系统，以将航天器星座的运动控制到很高的位置精度，以便可以实现大范围的迈克尔逊干涉仪并将其用于检测重力波。由于外部干扰，航天器将不断承受力和扭矩，从而导致位置扰动。因此，DFC系统的开发对于将航天器稳定到指定的公差至关重要。在进行这样的星载重力波飞行任务之前，需要一种技术演示任务，例如拟议的ODIE，ELITE或SMART-2，以测试无阻力航天器技术的可行性。本文讨论了实现DFC系统所需的硬件要求（即加速计，推进器）。已经开发出控制回路模型来对DFC系统的动态行为进行建模，从而可以量化其性能。结果表明，如果加速度计的噪声级为1x10〜（-12）m·Hz〜（-0.5），推力器噪声级为1x10〜（-8）N·Hz〜（-0.5），则ODIE加速预算很容易满足。

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