| 多档位扭摆推力测量装置的设计与标定实验 |
| Design and calibration experiments of multi-range torsional pendulum thrust measuring device |
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| 中文摘要: |
针对卫星用中高功率电推进器产生的推力范围跨度大，现有的推力测量装置存在测量范围不全、抗干扰能力差导致测不准等问题，开展了多档位三丝扭摆推力测量装置研究。首先，建立了推力测量装置物理模型，研究了推力与偏转位移之间的数学关系，并实现了多档位三丝扭摆推力测量装置的设计。接着，采用标准砝码与定制砝码对测量装置进行标定，并通过标定实验确定各档位下的测量误差。然后，综合考虑了装置的不确定度影响因素，设计相关试验开展不确定评估。实验结果表明：在实验环境不变的情况下，多档位三丝扭摆推力测量装置设计的小档位推力为98 mN的不确定度为0.030 mN（k![]() ![]() =2）；中档位推力为490 mN的不确定度为0.068 mN（k![]() ![]() =2），大档位推力为980 mN的不确定度为0.092 mN（k![]() ![]() =2）。多档位扭摆推力测量装置采用换档位的测量方法实现了9.8~1029 mN范围的推力测量，测量精度高、抗干扰能力强，解决了宽范围推力测量过程中全量程精度难以保证的问题，为中高功率电推进器推力测量提供技术支撑。 |
| 英文摘要: |
Aiming at the problems that the thrust range of medium and high power electric thrusters for satellites is large and the existing thrust measurement devices have incomplete measurement range and poor anti-interference ability, the research of multi-range three-filament torsional pendulum thrust measurement device has been carried out. The physical model of the thrust measurement device was established, the mathematical relationship between the thrust force and the deflection displacement was studied, and the design of the multi-range three-filament torsional pendulum thrust measurement device was realized. The measurement device was calibrated using standard weights and custom weights, and the measurement errors at each range were determined by calibration experiments. The uncertainty assessment of the device was carried out by considering the uncertainty influencing factors comprehensively and designing relevant experiments. The experimental results showed that the uncertainty of the multi-range three-filament torsional pendulum thrust measurement device was 0.030 mN (k![]() ![]() =2) for a small thrust of 98 mN, 0.068 mN (k![]() ![]() =2) for a medium thrust of 490 mN, and 0.092 mN (k![]() ![]() =2) for a large thrust of 980 mN in the same experimental environment. The multi-range torsional pendulum thrust measurement device uses the measurement method of changing gears to achieve thrust measurement in the range of 9.8~1029 mN with high measurement accuracy and strong anti-interference capability, which solves the problem that it is difficult to guarantee the full range accuracyin the process of wide range thrust measurement, and provides technical support for the thrust measurement of medium and high power electric thrusters. |
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| 中文关键词: 微推力测量 三丝扭摆 多档位调节 |
| 英文关键词:micro-thrust measurement three-filament torsional pendulum multi-range adjustment |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2022.03.09 |
| 引用本文：王青青, 贾军伟, 武宇婧, 李绍飞, 董学江, 郎昊.多档位扭摆推力测量装置的设计与标定实验[J].计测技术,2022,(3):. |
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