GEO轨道太阳帆热致干扰力矩分析
Thermal induced disturbance torque of GEO solar sail
王杰 1余晔 1张涛1
作者信息
- 1. 国防科技大学空天科学学院,长沙 410073
- 折叠
摘要
太阳帆由轻质伸展臂张拉大面积柔性薄膜结构组成.当太阳帆经历空间高低温环境时,温度场突变以及材料热膨胀系数的不一致将激起伸展臂的变形和振动,对太阳帆的姿态产生干扰力矩,影响控制系统的稳定性.提出了太阳帆热致干扰力矩分析方法,以豆荚杆式伸展臂支撑的太阳帆为仿真对象,建立了热-结构分析模型,分析了太阳帆在进出地影时结构的瞬态温度场分布,进一步计算了突变温度场下结构的动态响应,最后获取了热致动力学响应对中心星体的干扰力矩.数值仿真结果表明,热致变形和进出地影时伸展臂的热致振动将会对太阳帆中心星体造成不可忽视的干扰,干扰力矩幅值达10-3N·m.提出的方法可对太阳帆在轨热扰动响应进行精确预示,对工程设计具有理论指导意义.
Abstract
The solar sail is a complex system composed of large,flexible membranes that are tensioned by light booms.However,when the solar sail experiences high and low temperatures in space due to variations in the environment,the sudden change in temperature field can cause the booms to deform and vibrate.This disturbance torque can affect the attitude of the solar sail,leading to an instability in the control system.To address this issue,an analytical method is proposed for thermal-induced disturbance torque of the solar sail.Firstly,a thermal-structural analysis model is established that considers the transient temperature fields of the structure when the solar sail enters and leaves the shadow.This analysis enables us to better understand how the sudden temperature changes impact the sail's dynamics.Next,the dynamic responses of the sail under these temperature conditions are calculated,taking into account its deformation and vibration.Finally,the disturbance torque of the dynamic responses towards the central body of the solar sail is obtained.Results show that the thermal-induced deformation and vibration of booms when entering and leaving the earth's shadow can cause significant disturbances to the central body of the solar sail,with an amplitude of the disturbance torque reaching 10-3N·m.The simulation accurately predicts thermal disturbances in orbit,providing a valuable theoretical method for engineering purposes.
关键词
太阳帆/热致动力学响应/GEO/温度场/干扰力矩Key words
solar sail/thermal induced dynamic response/GEO/temperature field/disturbance torque引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据