卫星天线扫描驱动机构的一体化设计及力学仿真

Integrated Design and Mechanical Simulation of Satellite Antenna Scanning Driving Mechanism

卫星天线扫描驱动机构的刚度、精度及固有频率直接影响着载荷分系统的可靠性、精度和寿命。本文设计了一种由步进电机、行星减速器、旋转变压器串装的一体化轴系驱动机构;首先分析了驱动机构的轴系方案选型布局,再对驱动机构的轴系设计进行了刚度分析与指向精度分析,为轴系设计提供了理论依据;最后对驱动机构整体进行了力学仿真,进一步验证了结构设计的合理性。

The stiffness,accuracy and natural frequency of the satellite antenna scanning drive mechanism directly affect the reliability,accuracy and life of the load subsystem.The paper designs an integrated shafting drive mechanism which is assembled in series by stepping motor,planetary reducer and rotary transformer.Firstly,the shafting scheme of the driving mechanism is selected and analyzed.In addition,stiffness analysis,precision analysis are carried out for shafting design of driving mechanism,which provides theoretical basis for shafting design.Finally,the mechanical simulation of the whole driving mechanism is carried out to further verify the rationality of the structure design.