卫星应急模式姿态动力学仿真  

Attitude Dynamical Simulation of Satellite on Emergency Conditions

作　　者：刘铸永[1] 洪嘉振[1] 

机构地区：[1]上海交通大学工程力学系,上海200240

出　　处：《宇航学报》2007年第5期1123-1126,共4页Journal of Astronautics

基　　金：国家自然科学基金项目(10372057);博士点基金项目(20040248013)

摘　　要：对卫星在应急模式下进行姿态动力学数值仿真。考虑重力梯度和太阳光压,太阳帆板两面反射率的不同,以及存在阴影区情况,建立开环状态下精确的卫星姿态动力学方程。通过对某型号卫星四十种故障模式的数值仿真,发现其姿态在相当长的时间内不会发散失稳;重力梯度力矩和太阳光压力矩都是微量,在相当长的时间内对姿态变化起主要作用是飞轮卡死时卫星的姿态角和角速度;制动飞轮的卡死时间对对卫星姿态有显著影响,卡死时间越短,卫星姿态变化越明显。This paper studied attitude dynamical numerical simulation of satellite on emergency conditions.The satellite attitude precise dynamical equation on emergency conditions was established,while torque of gravity grads and torque of sunlight pressure were considered.The shadow zone and the different reflectivity of the solar panels' obverse and reverse were taken into account when torque of sunlight pressure was calculated.The numerical results of 40 case on emergency condition indicated that the satellite att...

关 键 词：卫星姿态 应急模式 动力学 数值仿真 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]