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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2013, Vol. 34 ›› Issue (10): 2287-2299.doi: 10.7527/S1000-6893.2013.0334

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Methods of Micro Thrust Measurement and Analysis of Its Key Issues

HONG Yanji, ZHOU Weijing, WANG Guangyu   

  1. State Key Laboratory of Laser Propulsion & Application, Academy of Equipment, Beijing 101416, China
  • Received:2013-04-15 Revised:2013-07-04 Online:2013-10-25 Published:2013-07-10

Abstract:

The technology of micro thrust measurement is employed to evaluate the performance of micro-thrusters. The measurement principles of steady thrust, pulse impulse, average thrust and instantaneous thrust are introduced. The classical thrust stands are summarized and classified into types of torsional beam, balance, hanging pendulum and hanging arm according to their dynamic configurations. Their characteristics, purposes, advantages and disadvantages are analyzed. Such key problems as measurement principle research, error influence factors and countermeasures, calibration, and measurement automatization are discussed. Based on the above analysis, a μN-thrust stand is designed and implemented. The experiment results demonstrate that the designed system features good repetitivity of measurement and up to μN levels of accuracy. Thus it verifies the feasibility of the thrust stand for thrust measurement and its effect in improving precision and stability.

Key words: micro-thruster, steady thrust, pulse impulse, average thrust, instantaneous thrust, thrust measurement, impulse measurement

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