Two dimensional dynamics of continuous cislunar payload transfer system considering structural deviation effect

Based on the motorized momentum exchange tether (MMET), with the principle of momentum exchange and by considering the structural deviation (including the tether length deviation and payload mass deviation), the two dimensional error dynamics of continuous cislunar payloads transferring system (CCPTS) was built by Lagrange method and its numerical simulated solution was solved by Mathematica software. Under the conditions of existing the tether length deviation and payload mass deviation, the dynamic simulations of the CCPTS were presented. It is shown that tether length deviation and payload mass deviation have similar influence on CCPTS's dynamics (including generalized coordinates and generalized velocity). With the increment of tether length deviation or payload mass deviation, the maximum of the CCPTS's generalized coordinates' deviation and generalized velocities' deviation increases linearly. However, the maximum of the CCPTS's generalized accelerations have no evident linear relation with the structure deviation of the CCPTS. Lastly, the external torque can weaken the influence degree of the structure deviation of the CCPTS on the dynamic parameters.