一种基于独立成分分析的滚转弹姿态解算

Estimation of the attitude of a rolling missile based on independent component analysis

为了获取试验弹的飞行姿态,以便为进一步的弹体飞行动力学分析及制导系统的效能评估提供依据,提出了一种基于独立成分分析(independent component analysis,ICA)的滚转弹飞行姿态获取方法。该算法使用一个双轴角速率陀螺构成滚转弹飞行姿态遥测系统,利用ICA算法对遥测数据进行处理,从而重构弹体飞行姿态。通过构造一个特殊的虚拟观测变量,即可借助于ICA算法将测量信号由弹体坐标系变换至准弹体坐标系,去除由于弹体滚转引入的信号调制效应,最终解算出滚转弹的姿态信息。仿真计算结果验证了算法的有效性。

To get the attitude of an experimental missile, a scheme to estimating the flight attitude of a rolling missile based on the independent component analysis（ICA）algorithm is proposed, thus offering a basis for further analysis on the flight dynamics performances and effectiveness of control and guide systems. A telemetry scheme based on two-axis liquid-droved rate gyroscope is studied and the telemetric data are processed by ICA algorithm to reconstruct the attitude of missiles. By constructing a special virtual measure variable, the ICA algorithm is introduced to transform the measure signals from body frame to quasi-body frame and the modulated effect caused by the rolling of missile body is removed. Thus the attitude information of rolling missiles would be obtained in the end. The simulation example shows the effectiveness of the proposed algorithm.