IKAROS太阳帆第一次展开过程动力学分析

The on-orbit deployment of the spatial structure involves the complex high-dimensional nonlinear dynamic problems,the analysis on which is one of the challenges in the astrodynamics field and the precondition of performing the control strategy on the on-orbit deployment process.In this paper,taking the 1st deploying stage of the IKAROS solar sail as an example,the flexible stretching hub-beam model is proposed and the dynamic equation for which is presented based on the Hamiltonian variational principle.Employing the complex structure-preserving method which focuses on the local dynamic behaviors of the system,the 1st deploying process of the IKAROS solar sail is simulated under two working conditions(invariable torque and constant power)respectively.The numerical results show that the differences between the rotational velocities of the hub for the two cases are remarkable.The rotational stability of the hub turns bad with the invariable torque,which results in the large work needed in the 1st deploying stage of the IKAROS solar sail and implies that the constant power working condition can save energy in this process.