基于气浮台的编队飞行地面试验建模与鲁棒控制器设计

为分析验证卫星编队飞行涉及的相对导航、制导与控制以及星间通信等问题,搭建了编队飞行的地面试验系统,采用了一块3m×4.5m的气浮平台和具有两个平动自由度和一个转动自由度的卫星仿真器分别来模拟低阻力的空间环境和编队飞行的卫星,相对导航采用了视觉相机和室内GPS两种方案,星间通信则通过蓝牙进行模拟.推导了描述仿真器间相对运动的包含参数不确定性的动力学模型,并基于此模型设计了带极点配置的鲁棒H∞控制算法,通过姿态同步和构型保持等仿真实验重点对编队飞行的相对导航、星间通信和相对状态控制进行分析验证,对实际的编队任务具有一定的参考和指导意义.

Modeling and Robust Controller Design for Formation Flight Ground Tests Based on Air-Bearing Table

A ground simulation system is developed to analyze and validate relative navigation,guidance,control and inter-satellite communication techniques involved in satellite formation flight.The simulation system mainly consists of a 3m-by-4.5m air-bearing table and two satellite simulators with two degrees of freedom of translation and one degree of freedom of rotation.Relative navigation is realized by means of a vision camera mounted on the air-bearing table and an indoor GPS system.The bluetooth technique is adopted for inter-satellite communications.Dynamics with parameter uncertainties describing the relative motion between the two simulators are derived and a robust H∞ control law with pole placement is developed based on the dynamics.Simulation tests such as attitude synchronization and formation keeping are performed to analyze and validate relative navigation,relative control and inter-satellite communication for formation flight satellites.The ground simulation system developed in this paper provides meaningful results for space formation flight missions.