A Robust SINS/VO Integrated Navigation Algorithm Based on RHCKF for Unmanned Ground Vehicles
Author(s) -
Ya Zhang,
Fei Yu,
Yanyan Wang,
Kai Wang
Publication year - 2018
Publication title -
ieee access
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 127
ISSN - 2169-3536
DOI - 10.1109/access.2018.2873292
Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation
High precision localization information is the precondition of unmanned ground vehicles. But the global navigation satellite system (GNSS) signal turns unreliable in urban and forest areas since it is blocked by buildings and trees easily, which causes decline of localization accuracy. In order to solve this problem, an integrated navigation system based on the strapdown inertial navigation system and binocular camera visual odometer is utilized in this paper to provide navigation parameters for unmanned ground vehicles when the GNSS signal denies. However, the existing integrated navigation algorithm cannot meet the requirement of the high precision localization for unmanned ground vehicles because of the uncertainty and nonlinearity. As a result, a robust nonlinear filter based on the $H_\infty $ filter and the cubature Kalman filter, named RHCKF, is proposed in this paper, adopted in unmanned vehicle navigation. Simulation and real test are both carried out to verify the effectiveness of the novel navigation algorithm when the GNSS signal denies.
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