基于驱动力矩和转向角分岔的汽车驾驶稳定区域研究

项目名称： 基于驱动力矩和转向角分岔的汽车驾驶稳定区域研究

项目编号： No.51475199

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 机械、仪表工业

项目作者： 施树明

作者单位： 吉林大学

项目金额： 83万元

中文摘要： 汽车在驱动和转向联合工况下失稳的动力学本质特征问题以及集成控制的动力学判据问题，仍缺乏完整的理论研究，尤其缺乏对驱动力矩和转向角定义的汽车驾驶稳定区域的相关研究。 本项目根据车身及轮胎力学特性在纵向、侧向、横摆、俯仰和侧倾中的内在联系，建立汽车驱动转向稳定性分析模型；利用非线性方法分析驱动和转向耦合作用下的平衡点、分岔和混沌特征；利用遗传算法和非线性规划方法进行组合优化，求解耦合分岔点，确定汽车驾驶稳定区域；并以汽车驾驶稳定区域为基础，提出驱动和转向控制系统的前馈+反馈控制结构。 本项目将揭示汽车驱动和转向耦合分岔的动力学机理，提出汽车驾驶稳定区域的确定方法，设计新型控制结构，扩大汽车驾驶稳定区域和状态稳定区域，为汽车操纵稳定性集成控制和安全辅助驾驶系统设计提供动力学依据。

中文关键词： 车辆动力学；操纵稳定性；驾驶稳定区域；转向角分岔；驱动力矩分岔

英文摘要： The dynamic nature and the integrated dynamics control criterion under the instable driving and steering condition still lacks the complete theory research. Moreover, the related research about the driving stability region defined by drive torque and the steering angle has not been published. The driving and steering stability analysis model would be founded.The driving and steering coupled effect on equilibrium point , bifurcation and chaos characteristics would be analysed by nonlinear method.The vehicle stability region could be calculated by equilibrium point solution based on hybridization of Genetic Algorithm and nonlinear programming method. The control structure of 'feedforward + feedback' according to the stability region would be designed. From the above, the driving and steering coupled bifurcation dynamics mechanism would be revealed. The method for determining the vehicle driving stability region would be proposed. The new control structure would be put forward to expand the stability region and state stable region. The dynamics fundamental of the vehicle handling stability integrated control and safety assistant driving system design would be presented.

英文关键词： Vehicle dynamics;Handling stability;Driving stability region;steering angle bifurcation;Driving torque bifurcation