转向系统特性参数对中心转向区车辆性能的影响
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目次
转向系统特性参数对中心转向区车辆性能的影响(摘要链接) (2)
基于状态观测器的天燃气发动机控制策略研究(摘要链接) (3)
基于相似性科学的汽车动力传动系匹配研究(摘要链接) (4)
混合动力车用飞轮电池可行性分析及性能仿真(摘要链接) (5)
基于Matlab的半挂汽车列车侧倾稳定性分析(摘要链接) (6)
汽车空调系统异响引起的车内噪声研究与解决(摘要链接) (7)
ABS最佳滑移率控制算法的增益修正研究(摘要链接) (8)
离合器膜片弹簧模糊稳健优化设计(摘要链接) (9)
越野车辆典型地形通过性建模与仿真(摘要链接) (10)
冷起动环境下汽车风窗玻璃除霜特性研究(摘要链接) (11)
基于Ramsis的微型汽车驾驶员舒适性分析(摘要链接) (12)
三元催化器封装国产化开发(摘要链接) (13)
节制杆式模拟汽车座椅强度试验装置研究(摘要链接) (14)
密封条隔声测试方法的介绍与比较(摘要链接) (15)
一种新型高效环保的汽车空调替代制冷剂(摘要链接) (16)
集成铸造缺陷的铝合金轮毂疲劳寿命预测(摘要链接) (17)
转向系统特性参数对中心转向区
车辆性能的影响
管欣1姬鹏1,2詹军1
(1 吉林大学汽车动态模拟国家重点实验室; 2 河北工程大学)
【摘要】在总结中心转向区性能评价标准的基础上,建立了较完善的转向系统模型,将其嵌入到整车模型中,研究了转向系统参数对中心转向区性能的影响。通过中心转向区转向试验与仿真分析数据可知,转向系统传动比、干摩擦、刚度等特性参数直接影响驾驶员的驾驶疲劳度、驾驶路感和车辆的转向灵敏性。
关键词:转向系统特性参数中心转向区性能
Effects of Steering System Characteristics
Parameters on On-Center Performance
Guan Xin1, Ji Peng1,2, Zhan Jun1
(1.State Key Laboratory of Automobile Dynamics Simulation, Jilin University;2. Hebei
University of Engineering)
【Abstract】Based on the evaluation standards for on-center performance, the relatively perfect steering system model is built and imbedded into the complete vehicle model to study the effects of steering system parameters on the on-center performance. The steering tests and simulation results of on-center performance show that the characteristics parameters such as steering ratio, dry friction and stiffness etc.directly affect the driving fatigue, driving road sense and steering sensitivity.
Key words:Steering System; Characteristics Parameters; On-center Performance
基于状态观测器的天燃气发动机
控制策略研究
邹博文李静波陈本林邢春鸿
(中国汽车工程研究院-国家燃气汽车工程技术研究中心)【摘要】针对天然气发动机,在建立进气空燃比均值模型的基础上,根据稳态工况下精度高、瞬态工况下响应快的控制需求,在稳态工况下设计了闭环状态观测器,保证了对进气量的精确估计;在瞬态工况下设计了进气量开环而压力闭环的状态观测器,在确保对进气量估值具有较高精度的同时提高了估计实时性。结合天然气密度补偿策略形成了基于模型的控制策略,通过台架试验对控制策略进行了验证。
关键词:天然气发动机状态观测器空燃比控制策略
Research of Natural Gas Engine Control Strategy
Based on State Observer
Zou Bowen, Li Jingbo, Chen Benlin, Xing Chunhong
(China Automotive Engineering Research Institute-China National NGV
Engineering Research Center)
【Abstract】Based on a model with mean intake air fuel ratio and the control requirements of high precision under steady work condition and quick response under transient work condition, a close-loop state observer was designed under steady work condition to guarantee the accurate estimation for intake air quantity; and a state observer with intake air quantity open loop and pressure close loop was designed under transient work condition to obtain not only higner accuracy but also better real time of intake air quantity estimation. The NG density compensation strategy was introduced to improve control accuracy and the control strategy was validated by bench tests.
Key Words:Natural Gas Engine, State Observer, Air Fuel Ratio, Control Strategy