引力波探测卫星地面仿真实验台设计与 一致性分析

A ground simulation platform equivalent to the dynamics and control system of gravitational wave detection satellites is proposed for ground testing. Existing platforms struggle to meet the microgravity requirements for such tests. The designed platform utilizes elastic pivots to counteract gravitational stiffness, forming a quasi-zero stiffness five-degree-of-freedom motion stage to simulate spacecraft platform motion, coupled with a torsion pendulum system to model test mass dynamics. Based on the π theorem, design parameters are derived from satellite parameters via similarity analysis, while feedback linearization is employed to mitigate residual disturbances, ensuring dynamic equivalence with the space satellite. Control law design based on the π theorem achieves consistent control effects. Numerical simulations under drag-free and electrostatic suspension control modes confirm dynamic and control equivalence between the ground platform and space satellite, validating the design’s rationality and effectiveness.