滚动姿态对阳光与卫星向阳面夹角的影响分析

采用理论分析方法分析了卫星绕滚动轴滚动后,卫星向阳面与阳光的夹角的变化情况,用热分析工程软件NEVADA的数值计算反推结果,对理论分析结果进行了验证。分析结果表明：卫星姿态绕滚动轴滚动后,阳光与卫星向阳面的夹角相对于β角在不同纬度的变化趋势将不同,但在轨道周期内将发生周期性变化;随着滚动角的增大,该夹角的变化幅度也将增大。研究成果对卫星外热流分析具有参考意义。

Analysis of the Angle between Satellite Sun-facing Surface and Solar Ray in Roll Flight Mode

The β＇ angle between the satellite sun-facing surface and the solar ray is of great importance in system thermal analysis.The β＇ angle will be equal to the β angle,which is defined as the angle between the orbital plane and the solar ray,in normal flight mode.But the β＇ angle will change in rolling mode.In this paper,the thermal influence of the rolling angle on the β＇ angle is theoretically analyzed,which is in consistence with the results of the NEVADA software computation.The conclusion is obtained that the β＇ angle will change periodically with the latitude in an orbital period,and the changing amplitude of the β＇ angle will increase with the larger roll-angle.