An Improved Adaptive Unscented Kalman Filter With Application in the Deeply Integrated BDS/INS Navigation System
| Autor: | Bocheng Zhu, Zun Niu, Lin Tao, Junren Sun |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
INS 010504 meteorology & atmospheric sciences General Computer Science Computer science Real-time computing BeiDou Navigation Satellite System 02 engineering and technology BDS 01 natural sciences Extended Kalman filter 020901 industrial engineering & automation Adaptive UKF General Materials Science navigation Inertial navigation system 0105 earth and related environmental sciences General Engineering Navigation system Kalman filter Nonlinear system Noise lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TK1-9971 Smoothing deep integration |
| Zdroj: | IEEE Access, Vol 8, Pp 95321-95332 (2020) |
| ISSN: | 2169-3536 |
| Popis: | The integration of the BeiDou Navigation Satellite System(BDS) and the Inertial Navigation System(INS) can provide a more reliable and accurate navigation service than either system alone. The deeply coupled architecture for BDS and INS integration has more superior performance than the loosely coupled or the tightly coupled. Owing to the complicated dynamic scenario and the nonlinear system’s noise uncertainty, the adaptive Kalman filter(AKF) algorithm is often adopted in the deep integration(DI) system. The adaptive Sage window methods including innovation-based adaptive estimation(IAE) and residual-based adaptive estimation(RAE) are widely applied in AKF algorithms, but they have several limitations. We propose an improved adaptive unscented Kalman filter(AUKF) based on forgetting-factor-weight smoothing and multi-factor adaptation to overcome these limitations. Compared with the Sage window methods, the improved AUKF algorithm is immune to the quantity change of the satellites concerning integration and more sensitive to present dynamic. Furthermore, it can reduce the computation and storage burden in implementation. A simulation test based on a software platform and the deeply integrated BDS/INS navigation system is carried out to evaluate the performance of the improved AUKF. Simulation results show that the improved AUKF algorithm outperforms the extended Kalman filter(EKF) and has a similar performance with the RAE-AUKF. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|