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针对由飞轮等星上高速旋转部件所引起的高频姿态和指向抖动,提出一种基于磁流体动力学特性的角位移敏感器用于星上高精度宽带宽的微振动测量,以弥补常规姿态测量系统测量频带低,动态范围有限的缺点.介绍以扩展姿态确定带宽为基础的高精度姿态确定方法.给出了以陀螺、星敏及ADS测量信息为基础的宽带宽的姿态确定方法及系统的模型,采用了卡尔曼滤波来确定卫星姿态.仿真分析结果表明存在高频姿态抖动的情况下,宽带宽的姿态确定方法的估计精度优于传统的姿态确定方法,由此验证了宽带宽的姿态确定方法的有效性及精确性.
Aiming at high-frequency attitude and pointing jitter caused by high-speed rotating components such as flywheel, an angular displacement sensor based on MHD dynamics is proposed for micro-vibration measurement with high precision and wide bandwidth on a star to compensate for the conventional attitude measurement The system has low measurement frequency band and limited dynamic range.A method of high-precision attitude determination based on extended attitude determination bandwidth is introduced.The method and system of attitude determination for wide bandwidth based on gyroscope, Xingmin and ADS measurement information is given Model, the Kalman filter is used to determine the satellite attitude.The simulation results show that the estimation accuracy of the wideband attitude determination method is superior to the traditional attitude determination method in the presence of high-frequency attitude jitter, thus verifying the wideband attitude Determine the effectiveness and accuracy of the method.