扭摆推力架传感单元理论设计及仿真分析

Theoretical design and simulation analysis of sensing unit for torsional pendulum thrust frame

针对微纳卫星上电推进器产生的推力小量值、测试难,测不准问题,开展小推力测量研究。采用杠杆原理和扭矩平衡原理,建立了5~100 mN扭摆型推力架传感单元机理模型,研究了不同推力作用下的偏转性能,得出了偏转位移与推力的线性关系。采用ANSYS仿真软件对传感单元进行仿真分析,得到不同参数条件下的位移云图,将理论数据与仿真结果进行比较分析,最终表明传感单元结构设计合理。

The small thrust measurement research is performed to address the problem of small thrust values,difficult testing and inaccuracy of measurement generated by electric thrusters on micro-nano-satellites.The mechanism model of 5~100 mN torsional pendulum thrust frame sensing unit is established by using the principle of leverage and torque balance.The deflection performance under different thrusts is studied,and the linear relationship between deflection displacement and thrust is derived.The ANSYS simulation software is used to simulate the sensing unit and obtain the displacement clouds under different parameter conditions.The theoretical data and the simulation results are compared and analyzed,and the result shows that the structural design of the sensing unit is reasonable.