关键词: 微推力测量;冲击力;微型推进器;微型喷嘴;微小卫星

Abstract: If micro-thrust is measured directly by mounting the micro-thruster on the test stand,the fluid supplying pipes,power cords,thermocouple wires and so on,which connect the thruster with equipments outside the test stand,often disturb micro-thrust test signal severely and cause large error,even failure.To overcome this problem,it is proposed to test the impinging force produced by the jet from the micro-cold gas thruster impinging on the test probe,instead of testing the thrust force directly and study the relation between impinging and real thrust forces.It is found that if the test probe area is large enough,the profile of the impinging force with respect to the distance between the nozzle and the test probe will turn out a plateau area.The impinging force within the plateau area changes little and is almost equal to the real thrust force.

Key words: Micro-thrust test;Impinging force;Micro-thruster;Micro-nozzle;Micro-satellite