Ability Statement: Not applicable. Conflicts of Interest: The authors declare no conflict of interest.
applied sciencesArticlePolar Area Integrated Navigation System Based on Covariance TransformationYongjian Zhang, Lin Wang , Guo Wei and Chunfeng GaoCollege of Sophisticated Interdisciplinary Research, National University of Defense Technology, Changsha 410073, China; [email protected] (Y.Z.); [email protected] (G.W.); [email protected] (C.G.) Correspondence: [email protected]: Aircraft flying the trans-arctic routes generally apply inertial navigation mechanization in two distinctive navigation frames, e.g., the regional geographic frame along with the grid frame. Nonetheless, this transform of navigation frame will trigger filter overshoot and error discontinuity. To resolve this trouble, taking the inertial navigation system/global navigation satellite program (INS/GNSS) integrated navigation technique as an instance, an integrated navigation strategy based on covariance transformation is proposed. The connection of your technique error state between different navigation frames is deduced as a implies to accurately convert the Kalman filter’s covariance matrix. The experiment and semi-physical simulation benefits show that the presented covariance transformation algorithm can efficiently solve the filter overshoot and error discontinuity brought on by the adjust of navigation frame. Compared with non-covariance transformation, the program state error is thereby lowered considerably. Keywords and phrases: covariance transformation; integrated navigation; polar regionCitation: Zhang, Y.; Wang, L.; Wei, G.; Gao, C. Polar Area Integrated Navigation System Primarily based on Covariance Transformation. Appl. Sci. 2021, 11, 9572. https://doi.org/ 10.3390/app11209572 Academic Editors: Kamil Krasuski and Damian Wierzbicki Received: eight June 2021 Accepted: 12 October 2021 Published: 14 October1. Introduction Thinking of that the distance of an excellent circle flight route is shorter, working with trans-arctic routes can achieve excellent savings in flying time when aircraft make transcontinental Lenacil Biological Activity flights. As a result of demands of flight safety, each aircraft usually uses an INS/GNSS integrated navigation technique to supply high-precision navigation information and facts. The INS/GNSS integrated navigation program has broad improvement prospects. Preceding literature [1] proposed an integrated navigation scheme based on INS and GNSS single-frequency precision point positioning, which is expected to be an benefit for low-cost precise land automobile navigation applications. Various researchers [2,3] have discussed the application of GNSS/INS on railways. Conventional INS/GNSS-integrated navigation algorithms are based on a north-oriented geographic frame. However, as the latitude increases, the traditional algorithms lose their efficacy within the polar area due to the meridian convergence. To solve this trouble, when the aircraft is inside the polar region, pilots commonly strategy their route based on polar-adaptable coordinate frames, for instance the Earth-centered Earth-fixed frame (e-frame) [4], transversal Earth frame (t-frame) [5,6], pseudo-Earth frame [7], wander frame [8] and grid frame (G-frame) [9,10]. Although these coordinate frames are adaptable to polar regions, they can not achieve productive worldwide navigation individually simply because some of them have certain mathematical GLYX-13 Epigenetic Reader Domain singularities, including the t-frame, pseudo-Earth frame, wander frame, and G-frame. These coordinate frames are often adopted only in the polar reg.
