Wang Yanan, Ge Chongjian, Cheng Le, Ding Weidong, Geng Jinyue
State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
Beijing Institute of Control Engineering, China Academy of Space Technology, Beijing 100094, China.
Rev Sci Instrum. 2019 Jul;90(7):076111. doi: 10.1063/1.5063852.
In this paper, a torsional thrust balance with an asymmetrical arm is designed and tested which is effective for the microthruster performance evaluation in the vacuum facilities with limited space. An optimization design method for the key parameters of the thrust balance has been developed. By utilizing the asymmetrical arm, a great resolution can be obtained with a restrained arm length. A novel printed circuit board electrostatic comb has been applied to the thrust balance calibration. Experimental results show that the comb is capable of producing steady force in the range of about 30 μN-3300 μN and an impulse bit of 7 µNs-777 µNs which can be further extended to nano-Newton second range with a shorter pulse width and a lower voltage. The calibration results show that the thrust balance has a great repeatability and reliability. The total uncertainty of the thrust stand is estimated to be 3.33% in the 1 µNs range.
本文设计并测试了一种具有不对称臂的扭转推力天平，该天平对于在空间有限的真空设施中评估微推进器性能非常有效。已经开发了一种用于推力天平关键参数的优化设计方法。通过使用不对称臂，在限制臂长的情况下可以获得很高的分辨率。一种新型印刷电路板静电梳已应用于推力天平校准。实验结果表明，该梳子能够在约30 μN - 3300 μN的范围内产生稳定的力，以及7 µNs - 777 µNs的冲量，通过更短的脉冲宽度和更低的电压，冲量可进一步扩展到纳牛秒范围。校准结果表明，推力天平具有很高的重复性和可靠性。在1 µNs范围内，推力台的总不确定度估计为3.33%。
