基于双层模糊逻辑方法的智能车辆行驶稳定性研究
Driving Stability of Intelligent Vehicles Based on Double-Layer Fuzzy Logic Method
DOI: 10.12677/ORF.2023.131039, PDF,   
作者: 郭婧博, 刘 飞:上海工程技术大学机械与汽车工程学院,上海
关键词: 模糊逻辑自适应分布式稳定性Fuzzy Logic Adaptive Distributed Stability
摘要: 为提高智能车辆紧急工况下的自主维稳能力,提出一种基于双层模糊逻辑方法的行车稳定性自动调节策略。首先分析了车辆行驶稳定性影响参数,制定相应参数的理想约束范围,搭建车辆二自由度参考模型。其次将模型参数理想值与实际值偏差作为模糊逻辑输入量,然后引入额外比例因子和量化因子,实现内外双层自适应调节。最后将模糊逻辑输出的期望横摆力矩转换为纵向力矩,再基于摩擦椭圆理论分配给各轮,实现分布式前馈控制。在五次多项式路径下进行对比仿真试验,结果表明,所提出的双层模糊自适应调节策略可将车辆行驶稳定性提高20%以上。
Abstract: In order to improve the intelligent vehicles’ stability maintenance capability under emergency conditions, an automatic adjustment strategy of driving stability based on a two-layer fuzzy logic method is proposed. Firstly, the vehicle driving stability influencing parameters are analyzed, the ideal constraint range of corresponding parameters is formulated, and the vehicle two-degree-of-freedom reference model is built. Secondly, the deviation between the ideal and actual values of the model parameters is taken as the input quantity of the fuzzy logic, and then additional scaling factors and quantization factors are introduced to realize the internal and external two-layer adaptive adjustment. Finally, the desired yaw moment output from the fuzzy logic is converted into longitudinal moment, and then distribute to each wheel based on the friction ellipse theory to realize distributed feed forward control. Comparative simulation tests are conducted under five polynomial paths, and the results show that the proposed two-layer fuzzy adaptive regulation strategy can improve the vehicle driving stability by more than 20%.
文章引用:郭婧博, 刘飞. 基于双层模糊逻辑方法的智能车辆行驶稳定性研究[J]. 运筹与模糊学, 2023, 13(1): 371-381. https://doi.org/10.12677/ORF.2023.131039

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