关键词: 发动机;推力向量控制;推力测量;向量运算;最小二乘法;推力偏差;推力偏心角

Abstract: A two axial rotating table was designed to measure the thrust vector of small engine used for satellite According to the characteristics of thrust vector and the requirements of measurement of small engine, a linear combination method was made for the indirect measure of thrust vector based on the analysis of the mathematical model of the two axial rotating table Firstly,an overdetermined system of equations of measured data was built up by rotating and stretching the rotating table, then the thrust vector parameters were calculated with least square method applied to the overdetermined system of equations The experimental results show that the uncertainty of measurement of thrust vector is in ±5%, in the allowable range of predefined technical requirements

Key words: Engine;Thrust vector control;Thrust measurement;Vector operational;Least square method;Deviation of thrust;Thrust misalignment angle