论文部分内容阅读
微推力测量技术是微推进器设计的关键技术之一,是微小卫星进行轨道保持、姿态控制的基础技术。多脉冲平均微推力的测量对于脉冲微推进器的特性研究有着重要的作用。对常用的微推力测量方法进行了总结,提出了一种多脉冲微推力测量的方法。基于二阶系统模型,利用傅里叶展开的方法,分析了在多脉冲推力作用下测量系统的动态响应。理论分析和仿真结果表明:在推力脉冲的频率远高于测量系统的固有频率时,系统的稳态转角同微推进器的平均推力成正比;可通过测量系统的稳态转角来获得平均推力大小;通过测量得到的平均推力,还可以获得总冲的大小。该测量方法可以有效避免推力信号的波动对于平均推力测量的影响。
Micro-thrust measurement technology is one of the key technologies of micro-thruster design. It is a basic technology of micro-satellite for orbit control and attitude control. The measurement of multi-pulse average micro-thrust plays an important role in the study of the characteristics of pulse micro-thrusters. The commonly used micro-thrust measurement methods are summarized, and a multi-pulse micro-thrust measurement method is proposed. Based on the second-order system model, the dynamic response of the measuring system under multi-pulse thrust was analyzed by Fourier expansion method. Theoretical analysis and simulation results show that when the thrust pulse frequency is much higher than the natural frequency of the measurement system, the steady-state rotation angle of the system is proportional to the average thrust of the micro-propeller; the average thrust force can be obtained by measuring the steady-state rotation angle of the system By measuring the average thrust, you can also get the total size of the red. The measuring method can effectively avoid the influence of the fluctuation of the thrust signal on the average thrust measurement.