基于加速度区间判断的坡道识别方法

Slope Recognition Method Based on Acceleration Interval Judgment

介绍了坡道识别的原理;在功率谱分析的基础上,设计了纵向加速度滤波算法,通过比较汽车在坡道上行驶时用加速度传感器测得的加速度数值与汽车纵向速度经差分后获得的加速度数值之间的差异,进行了基于加速度区间判断的坡道识别方法研究;完成了水平道路的加速度比较试验和坡道识别的实车试验,并在此基础上进行了基于坡道识别的换挡规律设计。实车试验结果表明:该方法能够进行坡道识别,并具有简单、实用、高效的优点;这种基于行驶环境识别的控制是未来汽车控制技术发展的方向。

The slope recognition principle was introduced. The filtering algorithm of longitudinal acceleration based on power spectrum analysis was developed. The difference of the acceleration obtained from an acceleration sensor and the vehicle longitudinal speed when automobile traveled on a slope was analyzed and a method of identifying different slopes based on the acceleration interval judgment was investigated. The comparison tests of acceleration on the level road and the slope recognition field vehicular experiments were accomplished. Also, the shift gear based on the slope recognition was designed. The field vehicular experiment results show that this method has advantages of simpleness, practicality and high efficiency. The control based on driving environment recognition will be a future development trend of automotive control technology.