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Ground based tests for LISA and LISA Pathfinder

机译:LISA和LISA Pathfinder的地面测试

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LISA (Laser Interferometer Space Antenna) will be the first space-born antenna for Gravitational Waves in the range 10/sup -4/-10/sup -1/ Hz. It is a joint ESA-NASA effort, and it consists of a constellation of three satellites in heliocentric orbit, forming two semi-independent Michelson interferometers. Each spacecraft contains two test masses, nominally in pure geodesic motion, without any mechanical contact with the spacecraft. Distances between test masses on board each couple of spacecrafts (5 million Km apart) are monitored using on board lasers. On-ground tests are required to understand the couplings between the test-mass and environment, and between the various degrees of freedom of the test-mass itself. A two soft DOF system, a double roto-translational pendulum, is being studied as a test bench. Here we present an analysis of the system behavior, and the study of an active control system for the test-mass.
机译:LISA(激光干涉仪空间天线)将是用于10 / SUP-4 / -10 / SUP -1 / Hz的重力波的第一空间天线。它是一项联合国宇航局的努力,它包括在皮层轨道上的三个卫星星座,形成两个半独立的迈克尔逊干涉仪。每个航天器都包含两个测试质量,名义上在纯的测地运动中,没有与航天器的任何机械接触。在船上的激光器上监控测试群体的距离,每两对航天器(50万公里)在船上的激光器上监控。需要在接地测试中理解测试质量和环境之间的联轴器,以及在测试质量本身的各种程度之间。两种软DOF系统,一个双旋转翻译摆,正在研究作为测试台。在这里,我们对系统行为进行了分析,以及对测试质量的主动控制系统的研究。

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