Adjust to the balance of three-DOF air-bearing test-platform and the research of disturber torque
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摘要: 三轴气浮台是在地面模拟卫星姿态运动的支撑平台. 为有效进行卫星地面模拟仿真, 模拟卫星在外层空间的小干扰力矩力学环境, 首先分析气浮台扰动力矩, 针对重心相对于回转中心存在漂移时产生静态不平衡, 及主惯性轴相对于回转轴存在漂移时会产生动态不平衡的问题, 采用先手动平衡再自动平衡的方法, 调节气浮台平衡; 然后给出三自由度气浮台自动平衡动力学方程, 在平衡调整基础上, 用有效的测试手段测试气浮台的台体水平度、静不平衡力矩、干扰力矩等, 为小卫星姿态控制系统的仿真提供一个有效的、精确的实验平台.Abstract: Three-DOF air-bearing test-platform is the key test base of simulating the satellite attitude motion for simulating the satellite emulation effective, so as to simulate the torque-free environment in the space. 3-DOF air-bearing test-platform disturber moment is analysed. When there is a shift between the gravity center and the rotary center, the static unbalance appears. While a shift exits between main inertia axes and rotary axis, the dynamic unbalance appears. In addition, the principal and procedure of balancing a 3-DOF air-bearing test-platform and the technology of manual and automatic balancing it are discussed. The equations of kinetics are derived. At last a lot of methods are used to measure the static unbalance moment and disturber moment in order to supply satellites' attitude motion with a model of availability, precisions and efficiency.
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Key words:
- Air-bearing test-platform /
- Momentum wheel /
- Automatic balancing /
- Satellite /
- Unbalance torque
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