车载捷联惯导系统/里程仪组合导航充分利用各子系统的优点,有效地减小了系统误差,提高了系统的导航精度。但里程仪的刻度因子误差制约了导航精度的进一步提高。提出通过修正里程仪的刻度因子误差提高SINS/里程仪组合导航系统导航精度的方案。并基于激光测距传感器,实验测量了轮胎直径的实时变化,即0.01 MPa胎压变化和轮胎温度变化引起的轮胎直径的变化。实验结果初步验证了修正里程仪刻度因子误差的可行性。

The subsystem excellence of integrated navigation system of SINS/odometer for vehicle is fully used to reduce the system error and improve the navigation accuracy. However, the navigation accuracy is decided by the scale factor error of odometer. The scheme on the precise improvement of integrated navigation system of SINS/odometer for vehicle is proposed. Based on the laser range finder sensor, the real-time variation of tyre diameter is measured, such as the change induced by the 0.01 MPa variation of tire pressure and the temperature variation of tire. The feasibility of revising the odometer error is proven.