【摘要】 为了消除天地力学环境不一致对航天器在轨运行精度的影响，需要在地面开展航天器在轨微振动环境模拟试验，因此针对航天器的设施部分和平台部分，在航天器上、下两端建立了自由边界模拟系统和自动控制模块，通过力闭环和位移闭环对航天器重力卸载过程的平衡协调控制算法进行了设计和实施；并通过硬件设施搭建和软件程序编写完成现场试验，验证了控制系统的可行性和稳定性，也为未来航天器地面模拟试验中重力卸载过程控制系统的设计提供技术支撑并积累了工程经验。更多还原

【Abstract】 In order to eliminate the impact of inconsistent mechanical environments between space and the Earth on the operational accuracy of spacecraft in orbit, it is necessary to conduct micro-vibration environmental simulation for spacecraft on the ground. Therefore, a free boundary simulation system and an automatic control module for the facility and platform sections of spacecraft were established at the upper and lower ends of the spacecraft. The equilibrium coordination control algorithm for spacecraft gravity unloading process was designed and implemented by force and displacement closed-loops. In addition, through the construction of hardware setup and software programming, the on-site experiments were carried out to verify the feasibility and stability of the control system. The research may provide technical support and accumulated engineering experience for the design of gravity unloading process control systems in future spacecraft ground simulation experiments.更多还原