Geomagnetic gradient bionic navigation based on the parallel approaching method

Abstract

The priori geomagnetic map, which is difficult to obtain in practice, has a great effect on geomagnetic-aided navigation. In this paper, we propose a geomagnetic gradient bionic navigation method based on parallel approaching without a reference map. From the viewpoint of bionics, an objective function is developed to describe the convergence of geomagnetic navigation. According to the parallel approaching method, the radio equation of geomagnetic variation is proposed, and the heading angle is obtained by the least squares approximation method with geomagnetic gradient data. Simulation results show the proposed approach is able to navigate effectively without a magnetic priori map. Several experiments on different geomagnetic parameters are discussed, and a recommended method of parameter selection is presented. Our approach is also compared with the evolution method, and results in a more smoother and direct navigation path to the destination.

Application of bioinspired geomagnetic sensor measurements and geomagnetic map modeling based on neural networks in simulated navigation

“…These features and the corresponding gradient information are related to geographical location and can be regarded as reliable navigation sources [1]. Geomagnetic navigation has the characteristics of high accuracy and strong anti-interference ability [2]. It can work under all-weather, all-day, and all-region conditions, and has advantages that cannot be replaced by other navigation methods.…”

Comparison of geomagnetic aided navigation algorithms for hypersonic vehicles

“…Wang CY et al (2019) proposed a geomagnetic matching algorithm involving simulated annealing based constrained particle swarm optimization to enhance the accuracy and efficiency of geomagnetic matching. Zhou et al (2019) proposed a geomagnetic gradient bionic navigation system based on a parallel approximation method, which can achieve effective navigation without a non-priori geomagnetic reference map, by estimating the heading angel of the carrier.…”