scholarly journals Geometric Verification of Vector Fields for Autonomous Aircraft Navigation

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Giovanni Miraglia ◽  
Loyd R. Hook
Keyword(s):  
Vector Fields ◽  
Aircraft Navigation ◽  
Autonomous Aircraft ◽  
Geometric Verification

Vision Navigation with Salient Features for Autonomous Aircraft

2013 ◽  
Vol 278-280 ◽  
pp. 1237-1241
Author(s):  
Jun Wei Yu ◽  
Nan Liu ◽  
Gui Cai Wang ◽  
Xiao Bo Jin
Keyword(s):  
Navigation System ◽  
Inertial Navigation System ◽  
Unscented Kalman Filter ◽  
Vision System ◽  
Control Points ◽  
Vision Navigation ◽  
State Information ◽  
Aircraft Navigation ◽  
Autonomous Aircraft ◽  
Sequential Images

A novel technique of vision-aided navigation for autonomous aircraft is presented in this paper. The aircraft’s position and pose are estimated with several control points. The saliency descriptor of corner is defined and the control points are selected according their saliency. Control points are tracked in sequential images based on Fourier-Melline transform. The unscented Kalman filter is used to fuse the aircraft state information provided by the vision system and the inertial navigation system. Experiments show that the accuracy, efficiency and robustness of aircraft navigation system are improved with the proposed method.

Parallel Computation of Complex Antennas around the Coated Object Using Iterative Vector Fields Technique

2014 ◽  
Vol E97.C (7) ◽  
pp. 661-669
Author(s):  
Ying YAN ◽  
Xunwang ZHAO ◽  
Yu ZHANG ◽  
Changhong LIANG ◽  
Zhewang MA
Keyword(s):  
Parallel Computation ◽  
Vector Fields

Spacetime symmetries

2018 ◽  
Author(s):  
Michael Kachelriess
Keyword(s):  
Riemannian Manifold ◽  
Conservation Laws ◽  
Vector Fields ◽  
Killing Vector ◽  
Geodesic Equation ◽  
Spacetime Symmetries ◽  
Tensor Fields ◽  
Killing Vector Fields ◽  
Covariant Derivatives ◽  
Killing Equation

This chapter introduces tensor fields, covariant derivatives and the geodesic equation on a (pseudo-) Riemannian manifold. It discusses how symmetries of a general space-time can be found from the Killing equation, and how the existence of Killing vector fields is connected to global conservation laws.

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