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微型推进器固定在测试台架上进行微推力的直接测量,常会受到推进器工质导管等引线的干扰而造成较大的测量误差,甚至无法测量。为此提出用推进器喷嘴对准测力探头喷射,通过测量冲击力来间接获得微推力的思路,研究了微型冷气推进器产生的冲击力与微推力之间的关系。发现采用冲击力测量时,只要测力探头面积足够大,冲击力随着喷嘴与测力探头之间距离变化的曲线会出现一个高平台区,在此区域内所测得的冲击力大小变化不大,而且与真正微推力的大小几乎相等。
Micro-propeller fixed on the test bench for direct measurement of micro-thrust, often by the working fluid conduit and other lead propeller interference caused greater measurement error, or even impossible to measure. To this end, the idea of using the propeller nozzle to align the force probe ejection and indirectly obtaining the micro thrust by measuring the impact force is studied, and the relationship between the impact force and the micro thrust produced by the micro air-con propeller is studied. Found that the use of impact force measurement, as long as the force probe area is large enough, the impact force with the nozzle and the distance between the probe changes in the curve will appear a high platform area, measured in this area the impact of the size change does not Large, but almost equal to the size of the true micro-thrust.