HAO Ting, postgraduate, majors in wireless positioning and navigation and inertial navigation fusion positioning algorithm, E-mail: haoting1024@163.com
The road in the open-pit mining area is narrow, with many curves, rubbles, and bumpy roads. The special surface closed loop leads to system model anomalies and measurement noise uncertainty problems during positioning of transport vehicles. To address the above issues, we propose an SVD-AUKF algorithm with a noise estimator. The algorithm suppresses the pathological matrix that occurs during the filtering process by singular value decomposition of the covariance matrix, estimates the measurement noise using the Sage-Husa estimator, reduces the system state error, and introduces an adaptive factor to correct the system model error in real time to suppress the filtering divergence. We apply and test the proposed SVD-AUKF algorithm to the GPS/INS integrated navigation system model on a vehicle in a mining environment. The results show that the new algorithm has good applicability, with position accuracy improvements of approximately 50.69%, 51.20%, and 48.54% compared to the AUKF algorithm; speed accuracy improvements of approximately 31.24%, 33.83%, and 31.30% in E, N, U directions, which can effectively improve the filtering performance and increase system positioning accuracy.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |