tailieunhanh - Báo cáo hóa học: " Research Article GPS/Low-Cost IMU/Onboard Vehicle Sensors Integrated Land Vehicle Positioning System"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article GPS/Low-Cost IMU/Onboard Vehicle Sensors Integrated Land Vehicle Positioning System | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2007 Article ID 62616 14 pages doi 2007 62616 Research Article GPS Low-Cost IMU Onboard Vehicle Sensors Integrated Land Vehicle Positioning System Jianchen Gao Mark G. Petovello and M. Elizabeth Cannon Position Location and Navigation PLAN Group Department of Geomatics Engineering University of Calgary 2500 University Drive NW Calgary AB Canada T2N1N4 Received 14 October 2006 Accepted 9 April 2007 Recommended by Gunasekaran S. Seetharaman This paper aims to develop a GPS low-cost IMU and onboard vehicle sensors integrated land vehicle positioning system at low cost and with high cm level accuracy. Using a centralized Kalman filter the integration strategies and algorithms are discussed. A mechanism is proposed for detecting and alleviating the violation of the lateral nonholonomic constraint on the wheel speed sensors that is widely used in previous research. With post-mission and real-time tests the benefits gained from onboard vehicle sensors and the side slip detection and alleviation mechanism in terms of the horizontal positioning accuracy are analyzed. It is illustrated by all the tests that GPS plays a dominant role in determining the absolute positioning accuracy of the system when GPS is fully available. The integration of onboard vehicle sensors can improve the horizontal positioning accuracy during GPS outages. With respect to GPS and low-cost IMU integrated system the percentage improvements from the wheel speed sensor are for the open-sky test and for suburban area real-time test. By integrating all sensors to detect and alleviate the violation of the lateral nonholonomic constraint the percentage improvements over GPS and low-cost IMU integrated system can be enhanced to for open-sky test and for the real-time test in suburban area. Copyright 2007 Jianchen Gao et al. This is an open access article distributed under the Creative Commons Attribution .

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