坡度对车载航位推算系统的影响分析研究

Research on Effect of Gradient on Vehicular Dead Reckoning System

当轮式车辆行驶的路面坡度发生变化时,会导致车辆载荷转移,从而引起轮胎半径变化,进而对车载航位推算带来的影响。建立了坡度路面上的车载航位推算误差模型,并进行了坡度路面上的跑车试验。结果表明,路面纵坡度每增加1°,里程仪刻度系数约减少1‰.

When road gradient changes, vehicle load transfer can be caused. Load transfer results in tire radius change, so vehicular dead reckoning is affected. Dead reckoning error model on gradient road was established, and the vehicle navigation experiment on gradient road was made. The results show that the odometer calibration coefficient approximately decreases by 1‰ when longitudinal gradient increases 1°.