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arXiv 1604.08360astro-ph.IMphysics.space-ph
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对LISA探路者自重的约束:设计要求、估算和试验程序

Constraints on LISA Pathfinder's self-gravity: design requirements, estimates and testing procedures

Valerio Ferroni

摘要:

LISA探路者卫星于2015年12月3日发射到日地第一拉格朗日点(L1),LISA技术包(LTP)将在那里进行测试。凭借其尖端技术,LTP将能够在$1-30\,\mathrm{mHz}$频带内实现前所未有的测地线运动残余加速度测量,测量精度可达$3 \times 10^{-14}\,\mathrm{m/s^2/{Hz^{1/2}}}$量级。航天器本身的存在是与两个验证试验质量相互作用的局部引力场的原因。潜在地,这种力的相互作用可能阻止实现目标自由落体水平,从而产生显著的噪声源。我们以低于$\mathrm{nm/s^2}$的精度平衡了这种引力,并通过有限元计算工具估计,根据对构成卫星的所有部件的位置和质量的测量结果制定了一项协议。下面,我们将介绍要求、设计和预期的在轨测试程序。

英文摘要:

LISA Pathfinder satellite has been launched on 3th December 2015 toward the Sun-Earth first Lagrangian point (L1) where the LISA Technology Package (LTP), which is the main science payload, will be tested. With its cutting-edge technology, the LTP will provide the ability to achieve unprecedented geodesic motion residual acceleration measurements down to the order of $3 \times 10^{-14}\,\mathrm{m/s^2/{Hz^{1/2}}}$ within the $1-30\,\mathrm{mHz}$ frequency band. The presence of the spacecraft itself is responsible of the local gravitational field which will interact with the two proof test-masses. Potentially, such a force interaction might prevent to achieve the targeted free-fall level originating a significant source of noise. We balanced this gravitational force with sub $\mathrm{nm/s^2}$ accuracy, guided by a protocol based on measurements of the position and the mass of all parts that constitute the satellite, via finite element calculation tool estimates. In the following, we will introduce requirements, design and foreseen on-orbit testing procedures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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