激光微推力器多脉冲作用下的力学性能测量方法  

Mechanical performance measurement method for laser microthruster working in multi-pulse mode

作　　者：周伟静 洪延姬 叶继飞 

机构地区：[1]装备学院激光推进及其应用国家重点实验室,北京怀柔101416

出　　处：《红外与激光工程》2016年第A02期5-10,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(11502301)

摘　　要：为研究脉冲激光推力器多脉冲工作模式下的推力/冲量力学特点,分析了扭摆系统在多脉冲作用力作用下的响应特点,提出了多脉冲作用力的平均推力和冲量的测量方法,并通过仿真分析了多脉冲作用力重频、非标准周期多脉冲力对测量的影响。仿真结果表明:当脉冲力的重频是扭摆固有频率的10倍以上时,可以利用稳态转角均值计算平均推力;在扭摆周期远大于多脉冲工作时间的4倍时,可以利用转角的最大峰值以及达到最大峰值前的转角测量值计算冲量;当脉冲作用力为非标准周期性作用力时,推力/冲量测量方法仍然有效。To research the thrust or impulse characteristics of the laser micro-thruster working in multipulse mode, the response characteristics of the torsional balance responding to multi-pulse force was analyzed. The measurement method of average thrust or impulse for multi-pulse force was brought forward, and the influence on the measurement of the frequency of the pulse force and when the pulse force was not standard periodic pulse was analyzed by simulation. The results demonstrate that the average thrust is determined as a function of the average equilibrium when the repetitive frequency of pulse force is much higher than the natural frequency such as 10 times. The impulse is determined as a function of the maximum peak and the angle before the maximum peak time when the period of the balance is longer than the working time of multi-pulse force. And when the multi-pulse force is not standard period pulse, the method above is effective.

关 键 词：激光推力器 多脉冲 推力测量 冲量测量 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程] TN249[电子电信—物理电子学]