关键词: 火箭发动机;推力测量;自动校准;压电陶瓷

Abstract: The factors which affected the accuracy and the efficiency of engine thrust measurement in the calibration process were analyzed.The mechanical model of loading measurement in the calibration was established and the formulas for calculating the force of the loading system were deduced.The methods for automatizing the calibration with the piezoelectric ceramic driving device and the computer controlling technique were presented and expounded in detail.In this method,the force precise controlling was realized by controlling the electric field activated on the piezoelectric ceramic driving device.The principle and application of the automatic calibration facility are introduced with the test data listed.The method and facility also can apply to the thrust measurement of all aerojet engines.

Key words: Rocket engine;Thrust measurement;Automatic calibration;Piezoelectric ceramic