摘要
针对高速紧急工况下运动型多用途车的侧翻主动安全问题,提出一种基于电液制动系统的汽车防侧翻单神经元PID控制策略。考虑紧急工况下前轮转角大及制动时汽车纵向运动与横向运动的耦合等非线性因素,建立运动型多用途车的非线性四自由度动力学模型;为满足汽车防侧翻控制对制动力的要求,研制了电液制动系统,试验表明可单独提供每个车轮所需制动力;兼顾汽车侧翻安全性及舒适性,提出一种新的汽车侧翻性能评价指标;基于该指标研究了差动制动的控制规则及单神经元PID控制算法。典型工况下的仿真实验表明,基于电液制动系统的防侧翻控制策略可有效防止汽车侧翻,且同时改善汽车侧倾时的舒适性和操纵性。
Aiming at the sport utility vehicle rollover active safety in critical driving maneuvers at high-speed, a roll- over prevention control strategy is proposed for sport utility vehicles with the single-neuron PID control algorithm based on electro hydraulic brake system. Considering the nonlinear characteristics of large front wheel steering angle and the coupling relationship between the longitudinal motion and lateral motion of the vehicle under critical condi- tion, a four degree of freedom nonlinear dynamic model for sport utility vehicle is established to describe rollover dy- namic characteristics of the sport utility vehicle. To meet the requirements of vehicle rollover prevention control on the braking force, an Electro Hydraulic Brake system was developed, which can provide the braking force for each wheel in the experiment. Then, a new vehicle rollover performance evaluation index is proposed to describe the vehicle roll- over safety and comfort performance. Based on this index, the control strategy of the differential braking and the sin- gle-neuron PID control algorithm are studied for vehicle rollover prevention. Simulation was performed on some typical operation conditions. The simulation results show that the differential braking control strategy based on the EHB sys- tem can effectively prevent the rollover, improve comfort performance and enable the vehicle to maintain maneuver- ability when avoiding rollover.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2013年第11期2572-2578,共7页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(11202096)资助项目
关键词
汽车防侧翻
电液制动
差动制动
汽车主动安全
vehicle rollover prevention
electro hydraulic brake
differential braking
vehicle active safety
