空间站力矩平衡姿态和动量平衡姿态的研究

研究了空间站的力矩平衡姿态(TEA)及动量平衡姿态(MEA)的求解方法。首先定义了瞬时TEA、平均TEA和MEA的概念并建立了环境力矩在本体系下的数学模型;其次用迭代法确定出瞬时TEA,进一步通过求解非线性方程组计算平均TEA,仿真表明在一个轨道周期中空间站保持在平均TEA时所受外力矩的平均值远小于保持在零姿态的情况;最后提出求解MEA的方法,仿真表明空间站保持在MEA的动量积累及其峰值远小于保持在零姿态的情况。

Study on Torque Equilibrium Attitude and Momentum Equilibrium Attitude of the Space Station

The solution methods of the torque equilibrium attitude(TEA) and the momentum equilibrium attitude(MEA) for the space station are studied in this paper.The concept of instantaneous TEA,average TEA and MEA are proposed.The models of environmental torques are also established.Instantaneous TEA in an orbital period is determined based on the iterative method.Then average TEA and MEA are obtained by solving the corresponding nonlinear equations.The simulation results show that the external torque is reduced and the momentum accumulation is slowed down,while the attitude of the space station keeps close to the equilibrium point.