title: A Modified Magnetic Gradient Contraction Based Method for Ferromagnetic Target Localization.
abstract: The Scalar Triangulation and Ranging (STAR) method, which is based upon the unique properties of magnetic gradient contraction, is a high real-time ferromagnetic target localization method. Only one measurement point is required in the STAR method and it is not sensitive to changes in sensing platform orientation. However, the localization accuracy of the method is limited by the asphericity errors and the inaccurate value of position leads to larger errors in the estimation of magnetic moment. To improve the localization accuracy, a modified STAR method is proposed. In the proposed method, the asphericity errors of the traditional STAR method are compensated with an iterative algorithm. The proposed method has a fast convergence rate which meets the requirement of high real-time localization. Simulations and field experiments have been done to evaluate the performance of the proposed method. The results indicate that target parameters estimated by the modified STAR method are more accurate than the traditional STAR method.
authors.affiliation: Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China. 18046522054@163.com.|University of Chinese Academy of Sciences, Beijing 100039, China. 18046522054@163.com.
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.affiliation: University of Chinese Academy of Sciences, Beijing 100039, China. xjzhang@mail.ie.ac.cn.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China. dongdongqu@126.com.|University of Chinese Academy of Sciences, Beijing 100039, China. dongdongqu@126.com.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Qu
authors.affiliation: Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China. xiaopan13@mails.ucas.ac.cn.|University of Chinese Academy of Sciences, Beijing 100039, China. xiaopan13@mails.ucas.ac.cn.
authors.forename: Xiao
authors.initials: X
authors.lastname: Pan
authors.affiliation: Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China. gyfang@mail.ie.ac.cn.
authors.forename: Guangyou
authors.initials: G
authors.lastname: Fang
authors.affiliation: Key Laboratory of Electromagnetic Radiation and Sensing Technology, Chinese Academy of Sciences, Beijing 100190, China. chluzh@163.com.|University of Chinese Academy of Sciences, Beijing 100039, China. chluzh@163.com.
authors.forename: Luzhao
authors.initials: L
authors.lastname: Chen
keywords: ferromagnetic target localization; iterative algorithm; magnetic dipole; magnetic gradient tensor