当前位置:
X-MOL 学术
›
Int. J. Mod. Phys. A
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A torsional thrust stand for measuring the thrust response time of micro-Newton thrusters
International Journal of Modern Physics A ( IF 1.6 ) Pub Date : 2021-04-09 , DOI: 10.1142/s0217751x21400157 Chao Yang 1, 2 , Jian-Wu He 1, 2 , Li Duan 1, 2 , Qi Kang 1, 2 ,
International Journal of Modern Physics A ( IF 1.6 ) Pub Date : 2021-04-09 , DOI: 10.1142/s0217751x21400157 Chao Yang 1, 2 , Jian-Wu He 1, 2 , Li Duan 1, 2 , Qi Kang 1, 2 ,
Affiliation
Drag-free technology functions as the keystone for space-based gravitational wave detection satellites moving along a geodesic path, like the Laser Interferometer Space Antenna (LISA) Pathfinder, to achieve ultra-high microgravity level. Several prerequisites for micro-thrusters operated under the drag-free technique include constantly adjustable thrust, high resolution, low noise and fast response time. Accordingly, a torsional thrust measurement system was methodically devised to measure the thrust response time of such micro-thrusters on the ground. The characteristics of the dynamic thrust change with time are inverted by the angular displacement of the torsional pendulum, established by the dynamic equation of the same, thus, measuring the rise/fall time of the thrust applied to the torsional pendulum. Calibration of the torsional pendulum thrust measurement system is carried out by the standard electrostatic force generated by the electrostatic comb-drive or microelectromechanical actuator, facilitating the suitable identification of the pendulum parameters. Afterwards, the electrostatic and electromagnetic forces generated by the actuator are applied to validate the measurable thrust response time of the torsional thrust stand. The experimental results show that the above-mentioned thrust stand can effectively measure the thrust response time up to 10 ms for a thrust step in 10 s of micronewtons, which qualifies as the thrust response time required by micro-thrusters for space-based gravitational wave detection.
中文翻译:
一种用于测量微牛顿推进器推力响应时间的扭转推力台
无阻力技术是天基引力波探测卫星沿测地线路径移动的基石,如激光干涉仪空间天线 (LISA) 探路者,以实现超高微重力水平。在无阻力技术下运行的微型推进器的几个先决条件包括不断可调的推力、高分辨率、低噪声和快速响应时间。因此,有条不紊地设计了一种扭转推力测量系统来测量这种微型推进器在地面上的推力响应时间。动态推力随时间变化的特性通过扭转摆的角位移来反转,由相同的动力学方程建立,从而测量施加到扭转摆的推力的上升/下降时间。扭摆推力测量系统的校准是通过静电梳状驱动器或微机电致动器产生的标准静电力进行的,便于对摆参数进行适当的识别。然后,应用执行器产生的静电力和电磁力来验证扭转推力架的可测量推力响应时间。实验结果表明,上述推力台可有效测量10 s微牛顿推力步长10 ms的推力响应时间,符合微推力器对天基引力波的推力响应时间要求。检测。
更新日期:2021-04-09
中文翻译:
一种用于测量微牛顿推进器推力响应时间的扭转推力台
无阻力技术是天基引力波探测卫星沿测地线路径移动的基石,如激光干涉仪空间天线 (LISA) 探路者,以实现超高微重力水平。在无阻力技术下运行的微型推进器的几个先决条件包括不断可调的推力、高分辨率、低噪声和快速响应时间。因此,有条不紊地设计了一种扭转推力测量系统来测量这种微型推进器在地面上的推力响应时间。动态推力随时间变化的特性通过扭转摆的角位移来反转,由相同的动力学方程建立,从而测量施加到扭转摆的推力的上升/下降时间。扭摆推力测量系统的校准是通过静电梳状驱动器或微机电致动器产生的标准静电力进行的,便于对摆参数进行适当的识别。然后,应用执行器产生的静电力和电磁力来验证扭转推力架的可测量推力响应时间。实验结果表明,上述推力台可有效测量10 s微牛顿推力步长10 ms的推力响应时间,符合微推力器对天基引力波的推力响应时间要求。检测。