重载货车挂档下坡速度变化特征仿真

为提高长大下坡道路大型车辆行车安全,建立了重载货车整车模型和道路模型,分析了载重量、挂档档位、路面坡度与挂档车速之间的关联和影响,探讨了挂档车速的波动特性及挂档机理,得到了不同坡度各档位挂档车速变化范围,提出了在挂档决策基础上结合驾驶人操纵行为特征谱的新型仿真模式。仿真结果表明:在挂档决策基础上结合驾驶人操纵行为特征谱分析长大下坡车辆行驶安全更具可靠性,从而为驾驶人挂档决策、道路行驶安全研究提供依据。

Simulation Research on the Variation Characteristics of Downhill Speed of Heavy-Duty Truck

In order to improve the driving safety of large vehicles on the downgrade section, the whole vehicle model of the heavy-duty and road model were established, the relationship and influence between load weight, hanging gear, pavement slope, pavement adhesion coefficient and hanging gear speed were analyzed, and the fluctuation characteristics and hanging mechanism of the stall speed were discussed. The range of speed change of stalls with different slope was obtained, and a new simulation mode combining driver manipulation behavior characteristic spectrum on the basis of hanging gear decision was put forward. Finally, taking a long downhill road as an example, the safety of vehicle growing downhill driving under different modes was studied. The simulation results show that it is more reasonable to analyze the driving safety of the vehicle with the driver''s manipulation behavior on the basis of the decision-making of the hanging gear, so as to provide the basis for the decision of the driver''s hanging gear and the related road safety research.