论文标题
新的LISA动力学反馈控制方案：测试质量控制的共同模式隔离和测试量加速的探针
New LISA dynamics feedback control scheme: Common-mode isolation of test mass control and probes of test-mass acceleration
论文作者
论文摘要
无阻力和态度控制系统是丽莎技术的核心要素，可确保航天器和测试质量的高动态稳定性，以达到空间中引力波天文学所需的灵敏度。在测试量上施加静电力是不可避免的，但应仅限于保持航天器测试质量系统系统所需的最低限度，同时授予测试质量自由落体的最佳质量。为了实现这一目标，我们提出了一种新的测试质量悬浮液方案，该方案仅按照观察到的任何差分测试质量运动的比例应用力和扭矩，并且我们证明了新方案可显着减轻控制整个系统所需的悬架力和扭矩的数量。所涉及的数学方法使我们能够得出一个可观察到的新的可观察到的测量，以测量相关敏感轴上投影的测试质量的差异加速度，这将对LISA数据校准，处理和分析产生重要影响。
The Drag-Free and Attitude Control System is a central element of LISA technology, ensuring the very high dynamic stability of spacecraft and test masses required in order to reach the sensitivity that gravitational wave astronomy in space requires. Applying electrostatic forces on test-masses is unavoidable but should be restricted to the minimum necessary to keep the spacecraft-test masses system in place, while granting the optimal quality of test-mass free-fall. To realise this, we propose a new test-mass suspension scheme that applies forces and torques only in proportion to any differential test mass motion observed, and we demonstrate that the new scheme significantly mitigates the amount of suspension forces and torques needed to control the whole system. The mathematical method involved allows us to derive a new observable measuring the differential acceleration of test masses projected on the relevant sensitive axes, which will have important consequences for LISA data calibration, processing and analysis.
