基于离合器接合速度的重型越野车辆起步控制研究

建立起步过程动力学模型并提出了起步过程评价指标,选取转速、位移等为控制参量,设计了基于接合速度的干式离合器分段控制策略。设计了起步分段控制模型,利用试验数据库统计得出分段控制的主要参数阈值。对所设计的控制策略进行了实车平路起步试验。以当量冲击度、起步时间和滑转圈数为评价指标,分析了起步控制效果。结果表明,所设计的基于离合器接合速度的起步控制策略满足起步平稳性和快捷性的要求,为后续开展适应全工况的优化控制奠定了基础。

Study of Launch Control for Heavy-duty Off-road Vehicles Based on Clutch Engaging Speed

According to dynamic modelling and evaluation indicator of launch process,a dry clutch subsection control strategy based on the clutch engaging speed is proposed by selecting the appropriate control parameters, such as rotate speed and displacement, etc. A subsection control model is established and the thresholds of control parameters are obtained from test database. The vehicle launch test under this control strategy is carried out in flat road conditions, and the control performance is evaluated using the indicators of the equivalent longitudinal jerk, start time and slipping rotation numbers.The results show that the control strategy based on the clutch engaging speed can meet the requirements of smoothness and fast starting, which lays a good foundation for the subsequent research on optimization control adapting to all conditions.