太阳光压作用下空间太阳能电站的动力学响应

Dynamic Response of Solar Power Satellite Considering Solar Radiation Pressure

研究了太阳光压作用下绳系空间太阳能电站的姿态和结构振动动力学响应。将太阳能电池板简化为Euler-Bernoulli梁,平台看作质点,绳子看作无质量的弹簧,建立了绳系空间太阳能电站的简化模型。采用绝对节点坐标法将梁离散,通过Hamilton原理建立了系统的动力学方程。采用辛Runge-Kutta方法进行数值仿真,通过数值算例验证了新模型和数值方法的有效性。最后,数值仿真表明,结构振动和太阳光压均会使系统的姿态产生小幅度振荡,太阳光压对结构振动产生的影响可忽略不计。

The attitude and structural vibration of tethered solar power satellite were studied considering solar radiation pressure.Firstly,the simplified model of tethered solar power satellite was established.The solar panel was modeled as an Euler-Bernoulli Beam,the bus was modeled as a particle,and the tethers were modeled as massless springs.The equations of motion were derived based on absolute nodal coordinate formulation and Hamilton's principle.Then,Symplectic Runge-Kutta method was adopted to solve the differential equations.The proposed model and numerical algorithm were validated through a numerical example.Finally,numerical simulations were carried out.Simulation results showed that solar radiation pressure as well as structural vibration cause small fluctuation of the attitude angle.Moreover,the effect of solar radiation pressure on structural vibration can be neglected.