基于最小二乘法的行駛滾阻與風阻系數研究

徐蟬　龔春輝　劉海峰　陳維濤

摘 要：整車行駛阻力直接關乎油耗的高低，在行駛阻力中起決定性的是輪胎滾動阻力與風阻力。為了直接有效的降低油耗，對輪胎滾動阻力與風阻力研究勢在必行。結合整車實際道路滑行試驗與混合動力臺架傳動系統內阻力試驗，利用最小二乘法將輪胎與地面的滾動阻力系數與整車行駛時的風阻系數擬合出來。輪胎滾動阻力系數與風阻系數的確定可以有效地指導整車實際道路行駛阻力的改進方向以及提升目標。

關鍵詞：行駛阻力 風阻 滾動阻力 最小二乘法

Research on Rolling Resistance and Wind Resistance Coefficient based on Least Square Method

Xu chan，Gong Chunhui，Liu Haifeng，Chen Weitao

Abstract：The driving resistance of the whole vehicle is directly related to the fuel consumption， and the decisive driving resistance is the tire rolling resistance and wind resistance. To reduce fuel consumption directly and effectively， it is imperative to study tire rolling resistance and wind resistance. Combined with the actual road sliding test of the vehicle and the resistance test in the transmission system of the hybrid electric bench， the rolling resistance coefficient between the tire and the ground and the wind resistance coefficient of the vehicle are fitted by the least square method. The determination of tire rolling resistance coefficient and wind resistance coefficient can effectively guide the improvement direction and goal of vehicle actual road driving resistance.

Key words：driving resistance， wind resistance， rolling resistance， least square method