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以驱动型动量交换绳系卫星系统(MMET)为载体,采用动量交换原理,考虑母星两端系绳长度偏差、两载荷质量偏差等结构偏差的前提下,应用拉格朗日(Lagrange)方法建立了连续地月载荷转移系统(CCPTS)的二维误差动力学模型.在不同的系绳长度偏差以及载荷质量偏差前提下,对所建立的误差动力学模型进行了数值仿真分析.仿真结果表明,系绳长度偏差以及载荷质量偏差对CCPTS的广义坐标、广义速度等动力学参数均产生了相似的影响,随着系绳长度偏差的增加(或载荷质量偏差的增加),CCPTS的广义坐标、广义速度偏差量的最大值均呈现相同的线性增加趋势,而对于广义加速度而言,则没有明显的线性关系.外力矩的存在能够在一定程度上削减因结构偏差所造成的对CCPTS动力学参数的影响程度.
In this paper, based on the MMET system, the principle of momentum exchange is adopted. Considering the structural deviation of the tether length and the two load mass deviations at both ends of the star, the Lagrange method A two-dimensional error dynamics model of continuous monthly load transfer system (CCPTS) was established.The numerical simulation of the established error dynamics model was carried out with different length errors of the tether and load quality.The simulation results show that , The length of tether and the mass deviation of load have a similar effect on the generalized coordinate and generalized velocity of CCPTS. With the increase of the length of the tether (or the increase of the load mass deviation), the generalized coordinates of CCPTS, The maximum value of generalized speed deviation shows the same linear increasing trend, but there is no obvious linear relation for generalized acceleration.The existence of external torque can reduce the influence of structural deviation on CCPTS kinetic parameters The degree of influence.