连续地月载荷转移系统二维柔性动力学建模与分析
发布时间：2018-07-15 21:15
【摘要】：为研究系绳柔性对连续地月载荷转移系统(continuous cislunar payloads transfer system,CCPTS)动力学的影响,利用Lagrange方法建立了CCPTS二维柔性动力学模型,并对所建立的二维柔性动力学模型进行了理论及仿真分析.通过对系绳为柔性绳与刚性杆两种情况下的动力学进行仿真对比分析表明:系绳柔性对CCPTS轨道、姿态参数有一定的影响,而这种影响表现为变量变化的时间不同步,并且会随着时间的推移逐渐增大;系绳的柔性特性导致母星径向加速度以及真近角加速度出现"毛刺"现象;由系绳长度所产生的重力梯度力矩对刚性杆和柔性绳产生了不同程度的影响;当外力矩不存在时,系绳旋转角速度随时间周期变化,当外力矩不为零时,旋转角速度随时间近似线性增加,增加的快慢由外力矩的大小决定.此外,系绳初始旋转角速度以及系绳长度对系绳的横向、纵向振动的幅值和周期均产生了一定的影响.
[Abstract]:In order to study the effect of mooring flexibility on the dynamics of continuous lunar load transfer system (continuous cislunar payloads transfer system), a two-dimensional flexible dynamic model of CCPTS is established by using Lagrange method, and the theoretical and simulation analysis of the two dimensional flexible dynamic model is carried out. The simulation results show that the flexibility of the tether has a certain influence on the CCPTS orbit and the attitude parameters, and the effect is that the time of variable change is out of sync. The flexibility of the tether leads to the "burr" phenomenon of the radial acceleration and the true angular acceleration of the parent star. The gravity gradient torque produced by the length of the tether has different effects on the rigid rod and flexible rope, when the external torque does not exist, the rotation angular velocity of the tether varies with the period of time, and when the external moment is not 00:00, The angular velocity of rotation increases linearly with time, and the increase is determined by the magnitude of external torque. In addition, the initial rotation angular velocity and the length of the tether have a certain influence on the amplitude and period of the transverse and longitudinal vibration of the tether.
【作者单位】： 哈尔滨工业大学航天学院;
【基金】：CAST重点创新基金(CAST20090801)
【分类号】：V476.3
，
本文编号：2125406
[Abstract]:In order to study the effect of mooring flexibility on the dynamics of continuous lunar load transfer system (continuous cislunar payloads transfer system), a two-dimensional flexible dynamic model of CCPTS is established by using Lagrange method, and the theoretical and simulation analysis of the two dimensional flexible dynamic model is carried out. The simulation results show that the flexibility of the tether has a certain influence on the CCPTS orbit and the attitude parameters, and the effect is that the time of variable change is out of sync. The flexibility of the tether leads to the "burr" phenomenon of the radial acceleration and the true angular acceleration of the parent star. The gravity gradient torque produced by the length of the tether has different effects on the rigid rod and flexible rope, when the external torque does not exist, the rotation angular velocity of the tether varies with the period of time, and when the external moment is not 00:00, The angular velocity of rotation increases linearly with time, and the increase is determined by the magnitude of external torque. In addition, the initial rotation angular velocity and the length of the tether have a certain influence on the amplitude and period of the transverse and longitudinal vibration of the tether.
【作者单位】： 哈尔滨工业大学航天学院;
【基金】：CAST重点创新基金(CAST20090801)
【分类号】：V476.3
，
本文编号：2125406
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