针对某微纳卫星新研制的三轴姿控动量球,采用仿真-物理联合研制试验方法分析和验证其力/位移加载策略、结构强度和性能.仿真结果表明:产品设计薄弱环节为锁紧机构与转子球接触面的外侧尖点处、锁紧机构远离接触面的一侧中间等.物理试验得到产品的1阶频率在206.9 Hz,与仿真结果基本一致;测得动量球力矩输出值约为0.02 N·m.根据物理试验结果提出产品设计改进建议. Aiming at the newly developed three-axis position-controlled momentum ball of a micro-nano satellite, the force / displacement loading strategy, structure strength and performance are analyzed and verified by the simulation-physics joint development test method.The simulation results show that the weak link in product design is the locking mechanism The outer cusp of the contact surface with the rotor ball, the middle of the side of the locking mechanism away from the contact surface, etc. The first-order frequency of the product obtained by physical experiment is 206.9 Hz, which is basically consistent with the simulation result; the measured momentum torque output value is about 0.02 N · m. Suggest product design improvement based on physical test results.