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Real-time estimation of roll angle for trajectory correction projectile using radial magnetometers
IET Radar Sonar and Navigation ( IF 1.7 ) Pub Date : 2020-09-17 , DOI: 10.1049/iet-rsn.2020.0136
Hui Zhao 1, 2 , Zhong Su 1, 2
Affiliation  

An adaptive extend Kalman filter(EKF) is designed to estimate the roll angle for trajectory correction projectile only using radial magnetometers. By analysing the characteristics of the radial magnetometer output signal and the complex angular motion of the high-spin projectiles, the measurement equation is established. Two important measures, namely noise parameter adaptation and increasing system observation, are taken to improve the performance of the designed EKF. The novelty of this study is the proposed adaptive EKF has no requirements on the magnetometer measurement accuracy. That is the magnetometers used need not undergo a complicated calibration process. In addition, orthogonal difference method is introduced to adjust noise parameters. Finally, a series of numerical simulations and flight tests are carried out to verify the performance of the proposed method. The results show the designed adaptive EKF can effectively estimate the roll angle for the trajectory correction projectile and could be extended to practical engineering applications.

中文翻译:

使用径向磁力计实时估算弹道修正弹的侧倾角

设计了自适应扩展卡尔曼滤波器(EKF),仅使用径向磁力计来估算用于弹道校正的侧倾角。通过分析径向磁力仪输出信号的特性和高转速弹丸的复角运动,建立了测量方程。采取了两项重要措施,即噪声参数自适应和增加系统观测,以提高设计的EKF的性能。这项研究的新颖之处在于,提出的自适应EKF对磁力计的测量精度没有要求。也就是说,所使用的磁力计无需经过复杂的校准过程。另外,引入正交差分法来调整噪声参数。最后,进行了一系列数值模拟和飞行试验,以验证所提方法的性能。结果表明,所设计的自适应EKF可以有效地估计弹道修正弹的侧倾角,可以推广到实际工程应用中。
更新日期:2020-09-18
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