Driver steering and muscle activity during a lane-change manoeuvre

The article reports an experimental study of driver steering control behaviour in a lane-change manoeuvre. Eight test subjects were instrumented with electromyography to measure muscle activation and co-contraction. Each subject completed 30 lane-change manoeuvres with one vehicle on a fixed-base driving simulator. For each driver, the steering torque feedback characteristic was changed after every ten manoeuvres; the response of the vehicle to steering angle inputs was not changed. Drivers' control strategies were found to be robust to changes in steering torque feedback. Path-following errors, muscle activity and muscle co-contraction all reduce with the number of lane-changes performed by the driver, suggesting the existence of a learning process. Comparing the test subjects, there was some evidence that high levels of co-contraction were used to allow high-frequency steering inputs to be generated. The results contribute to the understanding of vehicle-driver (and more generally, human-machine) dynamic interaction.     

微型客车新型吸能转向管柱总成设计

为保证某微型客车达到《防止汽车转向机构对驾驶员伤害的规定》国家标准的要求，针对转向盘后移量过大问题，对原转向管柱进行了重新设计，开发出具有防撞、吸能性能的转向管柱，减少了微型客车正面碰撞时的转向盘后移量，满足了微型客车车型变化要求。     

应用模糊自适应PID和预瞄策略的自主车辆转向控制

文中结合智能车辆路径跟踪过程中转向控制方面的特点，提出了一种将模糊逻辑、预瞄规律和自适应PID控制相结合的控制策略，建立起了相应的模型，验证了该方法的可行性和有效性，并提出了进一步改进的方向。     

汽车突发性故障的应急处理

本文介绍了在汽车行驶过程中遇到发动机熄火、制动失效、轮胎爆裂、车灯熄灭、飞车以及方向失灵等突发故障时,驾驶员应采取的紧急处理措施。     

无钥匙进入启动系统介绍

无钥匙进入与启动系统在新车型无线进入应心中正迅速地成为主流和通用的方案选择.相对于通过按遥控钥匙去控制车门的开与关和通过传统的钥匙去启动汽车,无钥匙进入与启动系统通过一个用户携带的智能钥匙提高了用户的舒适性和安全性.     

电子差速系统轮胎附着特性模拟仿真研究

电子差速系统相对于传统的机械式差速器可以实现转矩的精准分配,根据轮胎的纵向运动特性以及侧向运动特性,结合轮胎滑移率让内外侧车轮在过弯时拥有足够的附着力,减小整车的横摆角速度,提高过弯稳定性。采用后轮双电机的驱动方案,驱动电机采用直接转矩控制的方法,由整车控制器将指定的计算转矩信号发送给电机控制器完成动力分配,所需转矩根据驾驶员的加速踏板及方向盘转角,运用阿克曼转向模型计算得到。     

水下航行体操纵性指数与频率特性计算

本文根据水下航行体的侧-滚运动方程组，经拉普拉斯变换，求解了运动参数的传递函数；并用时域分析法与频率分析法，给出了四阶系统的操纵性指数K，T计算方法与频率特性的计算方法及其算例，以判别航行体的侧向、横滚方向运动的稳定性与机动性。     

铰接汽车转向器座可靠性分析

针对铰接式城市客车转向器座的受载特点,运用有限元分析方法计算了几种典型工况下某铰接汽车转向器座的疲劳强度,得到了转向器座接近实际工况的应力循环,然后利用其S-N曲线,基于Miner线性累计损伤准则计算其疲劳寿命。通过与成熟的产品疲劳分析结果的比较,获得了新车型的可靠性数据,减少了试验成本。     

Links between subjective and objective evaluations regarding the steering character of automobiles

This work presents an experiment on the relationships between subjective and objective evaluations of vehicle handling. Ten cars were examined objectively in several open-loop driving dynamics manoeuvres and subjectively by test persons in typical traffic situations. Results are extracted from a stationary test (the Slowly Increasing Steer Test), and a dynamical test (the Frequency Response Test). The subjective measurements are obtained from drivers on a rural road course via a questionnaire, which was developed to separately investigate the quantity level perception, the so-called “Niveau”, and the more qualitative “Liking”. These subjective “measurements” are embedded into a two-channel definition of “Steering Comfort” as a genus for “Steering Discomfort” and “Character”. The article concentrates on developing a statistical method for the consideration of correlations amongst the subjective/objective data. In doing so, the variance in example subjective Niveau ratings can be significantly explained by several objective quantities. Indicators for co-domains of validated discomfort characteristics and hints for endeavouring character Liking ranges are detected.     

三轴单机客车转向随动桥的关键技术

介绍了三轴单机客车转向随动桥的关键技术,偏角的控制、转向梯形关系的确立、保障转向平稳等。