Results 21 to 30 of about 28,117 (261)

Tightly Coupled Integrated Navigation Algorithm for Hypersonic Boost-Glide Vehicles in the LCEF Frame

Aerospace, 2021
According to the trajectory characteristics of hypersonic boost-glide vehicles, a tightly coupled integrated navigation algorithm for hypersonic vehicles based on the launch-centered Earth-fixed (LCEF) frame is proposed.
Kai Chen, Sensen Pei, Fuqiang Shen, Shangbo Liu   +3 more
doaj   +1 more source

Optimal fusion‐based localization method for tracking of smartphone user in tall complex buildings

CAAI Transactions on Intelligence Technology, Volume 8, Issue 4, Page 1104-1123, December 2023., 2023
Abstract In the event of a fire breaking out or in other complicated situations, a mobile computing solution combining the Internet of Things and wearable devices can actually assist tracking solutions for rescuing and evacuating people in multistory structures. Thus, it is crucial to increase the positioning technology's accuracy. The sequential Monte
Harun Jamil, Do‐Hyeun Kim
wiley   +1 more source

Adaptive weighted federated Kalman filtering based on Mahalanobis distance and its application in navigation

IET Communications, Volume 17, Issue 17, Page 1962-1973, October 2023., 2023
This paper proposes the adaptive weighted federated Kalman filtering based on Mahalanobis distance (MD‐AWFKF). Firstly, by calculating the Mahalanobis distance between the predicted value and the measured value of the system state, the random fluctuation of the measured value is detected.
Yi Gao, Zhaohui Gao, Hua Zong, Shesheng Gao, Genyuan Hong   +4 more
wiley   +1 more source

Research on precise positioning of shield roadheader robot system in coal mine

Gong-kuang zidonghua, 2022
At present, most of the positioning methods of underground tunneling equipment in coal mines adopt single auxiliary measurement methods such as machine vision, odometer and total station to combine with inertial navigation measurement to suppress the ...
MA Hongwei, YANG Jinke, MAO Qinghua, WANG Qiang   +3 more
doaj   +1 more source

Antarctic Sedimentary Basins and Their Influence on Ice‐Sheet Dynamics

Reviews of Geophysics, Volume 61, Issue 3, September 2023., 2023
Abstract Knowledge of Antarctica's sedimentary basins builds our understanding of the coupled evolution of tectonics, ice, ocean, and climate. Sedimentary basins have properties distinct from basement‐dominated regions that impact ice‐sheet dynamics, potentially influencing future ice‐sheet change.
A. R. A. Aitken, L. Li, B. Kulessa, D. Schroeder, T. A. Jordan, J. M. Whittaker, S. Anandakrishnan, E. J. Dawson, D. A. Wiens, O. Eisen, M. J. Siegert   +10 more
wiley   +1 more source

Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data

Geophysical Research Letters, Volume 50, Issue 11, 16 June 2023., 2023
Abstract The seafloor depths under the Cook Ice Shelf and Ninnis Glacier Tongue have not been directly measured, despite their importance for understanding ocean circulation and ice shelf change. We model the bathymetry underneath the floating ice and surrounding ocean using airborne gravity data.
Renata R. Constantino, Kirsty J. Tinto
wiley   +1 more source

Atom Strapdown: Toward Integrated Quantum Inertial Navigation Systems

NAVIGATION: Journal of the Institute of Navigation, 2023
We present an alternative technique for estimating the response of a cold atom interferometer (CAI). Using data from a conventional inertial measurement unit (IMU) and common strapdown terminology, the position of the atom wave packet is tracked in a newly introduced sensor frame, enabling hybridization of both systems in terms of acceleration and ...
Benjamin Tennstedt, Ashwin Rajagopalan, Nicolai B. Weddig, Sven Abend, Steffen Schön, Ernst M. Rasel   +5 more
openaire   +2 more sources

Airborne Absolute Gravimetry With a Quantum Sensor, Comparison With Classical Technologies

Journal of Geophysical Research: Solid Earth, Volume 128, Issue 4, April 2023., 2023
Abstract We report an airborne gravity survey with an absolute gravimeter based on atom interferometry and two relative gravimeters: a classical LaCoste&Romberg (L&R) and a novel iMAR strapdown Inertial Measurement Unit. We estimated measurement errors for the quantum gravimeter ranging from 0.6 to 1.3 mGal depending on the flight conditions and the ...
Y. Bidel, N. Zahzam, A. Bresson, C. Blanchard, A. Bonnin, J. Bernard, M. Cadoret, T. E. Jensen, R. Forsberg, C. Salaun, S. Lucas, M. F. Lequentrec‐Lalancette, D. Rouxel, G. Gabalda, L. Seoane, D. T. Vu, S. Bruinsma, S. Bonvalot   +17 more
wiley   +1 more source

Novel pedestrian navigation system based on zero velocity update procedure technology and improved Sage‐Husa adaptive Kalman filter with index fading memory factor

IET Wireless Sensor Systems, Volume 13, Issue 2, Page 48-57, April 2023., 2023
To obtain a high‐precision pedestrian location result under the environments that there is no GNSS signal, the paper proposes a novel pedestrian navigation system by using the zero velocity update procedure technology (ZUPT) and the improved Sage–Husa Adaptive Kalman Filter (SHAKF) based on index fading memory.
Lei Huang, Yuting Shi, Jianhua Wang, Xiaoqian Zhang, Daming Xu, Di Sang   +5 more
wiley   +1 more source

An improved initial alignment method based on adaptive robust CKF algorithm

Xibei Gongye Daxue Xuebao, 2022
When the misalignment angle is a large angle in the strapdown inertial navigation system (SINS), it is necessary to establish a nonlinear error model to estimate the error.
LI Pu, YANG Tao, MU Hongwei
doaj   +1 more source