基于探针诊断的HEMPT推力等效测量方法

An Equivalent Thrust Measuring Method of the Cusped Field Thruster Based on Probe Diagnosis

无拖曳卫星任务对会切场推力器(HEMPT)性能有更为精细的技术指标要求,针对目前的三丝扭摆测量系统由于技术限制不能快速精确地反应这些指标,从等离子体原理出发,推导了一种通过探针所测的数据计算推力的等效方法,并经过实验测量进行了验证。测量结果表明:该方法可以在一定范围内较为精确地计算推力,并且为微牛级推力测量以及推力分辨率测量提供了一种行之有效的参考方法。

Recently,the drag-free satellite mission needs more precise performance for the cusped field thruster(HEMPT),such as precise thrust resolution and accurate measurement of thrust noise.However,due to the technicallimitations,the current three-wire torsion pendulum measurement system cannot quickly and accurately reflect these indicators.Inthis paper,an equivalent method for calculating the thrust from the data measured by the probe is deduced,and is verified byexperimental measurements.The results show that the proposed method can calculate the thrust precisely in a certain range.So themethod provides a reference for the measurement of the mic-Newton thrust and the thrust resolution.