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介绍了富康雪铁龙轿车后轮随动转向结构的特点,说明了实现汽车后轮随动转向的原理;分析了后轮偏角和后轮随动转向的功能以及该结构所具有的提高汽车操控稳定性、乘坐舒适性和行驶安全性的性能。 相似文献
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随动转向的分析与综合方法研究 总被引:1,自引:0,他引:1
基于侧偏柔度的随动转向研究,从四轮转向力反馈控制的角度对随动转向的稳定性和鲁棒性进行了研究,提出一种随动转向非线性弹性特性的综合方法。 相似文献
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1随动转向前照灯简介1.1随动转向前照灯的作用东风雪铁龙C5轿车的发动机型号为ES9A,发动机ECU的型号为BOSCH ME7.4.7,装备有随动转向前照灯。图1是没有随动转向功能的前照灯照明情况,图2是有随动转向功能的前照灯照明情况。 相似文献
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在前人关于汽车周向随动转向研究成果的基础上,进一步考虑前照灯远光落地照明有效区域问题,提出解决远光落地照明区域有效化的具体方案,并进行分析比较,选出解决远光照明区域有效化的方案,在此基础上建立前照灯垂向随动转向数学模型。 相似文献
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随动式悬架转向原理及操纵稳定性分析 总被引:4,自引:1,他引:4
本文简要介绍了随动式悬架结构。通过对其中的橡胶悬置块结构与功能分析,揭示了其中随动转向特性原理,并初步揭示这种特性对改善汽车操纵稳定性所起到的重要作用。此种悬架结构也有县于汽车平顺性的改善。 相似文献
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<正>(接2015年第2期)一、转向前照灯的作用在东风雪铁龙C5轿车上,装备有随动转向前照灯。图1是没有随动转向功能的前照灯照明情况,图2是有随动转向功能的前照灯照明情况。随动转向前照灯的光束具有根据转向盘的转动角度自动调整光束角度的功能,在近光灯或远光灯开启的状态下,汽车转弯时随动转向,使光束紧随行驶道路方向,为转向车辆行进的前方区域提供照明,其可提供双倍的视野照明宽度,大大提高汽 相似文献
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运用CATIA三维数字模型"DMU Kinematics"模块,分别对转向管柱及转向传动轴相关件进行约束,获得转向传动轴运动模型及转向传动半轴运动包络、转向传动轴当量夹角,用于验证转向传动轴与周边件间隙及其力矩波动是否符合设计要求,进而为布置设计转向传动轴十字轴位置提供理论依据。 相似文献
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转向前桥在汽车上一个非常重要的功能就是实现汽车转向,而转向角是决定转向前桥性能的一个非常重要的参数,本文解决了在桥总成装配线快速调整某转向前桥转向角问题。 相似文献
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转向梯形机构的几何参数决定汽车转向时内、外转向轮转角的几何关系,在汽车转向时,各车轮的转向必须保证纯滚动而无滑动,使各车轮的转角必须保证有统一的瞬时转向中心。本文主要概述了重型车双前轴转向梯形及杆系的设计与计算。 相似文献
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利用某公司提供的实车数据建立了基于ADAMS的双前桥重型汽车的转向机构和悬架机构模型,运用该模型进行转向运动学关系虚拟仿真.并与理论数据进行比较。同时并对该车的悬架干涉情况进行仿真分析。其分析结果为该车转向系的改进设计提供了理论依据。 相似文献
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介绍三段式转向管柱的力矩波动原理,并利用Matlab进行了通用化程序设计计算。与传统的方法相比简化了工作,为转向系统的力矩波动分析提供了精确实用的方法。根据计算结果,对转向系统的硬点进行优化布置,从而达到最佳的操纵效果。 相似文献
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分析了承载13吨的转向驱动桥轮边结构,校核了轮毂轴承、半轴等关键零部件的强度,计算了转向驱动桥桥壳的应力,完备了大吨位汽车起重机转向驱动桥的设计资料,为其它类型的工程机械转向驱动桥设计提供了可借鉴的模式。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(2):218-235
The structural characteristics and steering behaviour of a six-track vehicle are described in this paper. Kinematic analysis for skid steering of a six-track vehicle under steady-state conditions on firm ground is conducted, with the relationship between thrust force and speed instantaneous centre of the track–terrain interface taken into consideration. A mechanical model for steady steering of a six-track vehicle is also presented based on the kinematic analysis. In this model, the steering inaccuracy and efficiency are defined to evaluate steering performance. The steering performance of a six-track vehicle is numerically simulated to analyse the effect of the structural parameters and deflection angles on tracks. A virtual prototype model is established based on the multi-body dynamics software RecurDyn for steering simulation and the findings coincide well with theoretical results. The theory and the virtual prototype simulations presented are verified by a power test of a bucket-wheel excavator. The method for analysing the steering performance of a six-track vehicle proposed in this paper provides a basis for designing a six-track vehicle. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(12):1149-1168
Vehicle steering dynamics show resonances, which depend on the longitudinal speed, unstable equilibrium points and limited stability regions depending on the constant steering wheel angle, longitudinal speed and car parameters. The main contribution of this paper is to show that a combined decentralized proportional active front steering control and proportional-integral active rear steering control from the yaw rate tracking error can assign the eigenvalues of the linearised single track steering dynamics, without lateral speed measurements, using a standard single track car model with nonlinear tire characteristics and a non-linear first-order reference model for the yaw rate dynamics driven by the driver steering wheel input. By choosing a suitable nonlinear reference model it is shown that the responses to driver step inputs tend to zero (or reduced) lateral speed for any value of longitudinal speed: in this case the resulting controlled vehicle static gain from driver input to yaw rate differs from the uncontrolled one at higher speed. The closed loop system shows the advantages of both active front and rear steering control: higher controllability, enlarged bandwidth for the yaw rate dynamics, suppressed resonances, new stable cornering manoeuvres, enlarged stability regions, reduced lateral speed and improved manoeuvrability; in addition comfort is improved since the phase lag between lateral acceleration and yaw rate is reduced. For the designed control law a robustness analysis is presented with respect to system failures, driver step inputs and critical car parameters such as mass, moment of inertia and front and rear cornering stiffness coefficients. Several simulations are carried out on a higher order experimentally validated nonlinear dynamical model to confirm the analysis and to explore the robustness with respect to unmodelled dynamics. 相似文献
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Riccardo Marino Stefano Scalzi Fabio Cinili 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2007,45(12):1149-1168
Vehicle steering dynamics show resonances, which depend on the longitudinal speed, unstable equilibrium points and limited stability regions depending on the constant steering wheel angle, longitudinal speed and car parameters.
The main contribution of this paper is to show that a combined decentralized proportional active front steering control and proportional-integral active rear steering control from the yaw rate tracking error can assign the eigenvalues of the linearised single track steering dynamics, without lateral speed measurements, using a standard single track car model with nonlinear tire characteristics and a non-linear first-order reference model for the yaw rate dynamics driven by the driver steering wheel input. By choosing a suitable nonlinear reference model it is shown that the responses to driver step inputs tend to zero (or reduced) lateral speed for any value of longitudinal speed: in this case the resulting controlled vehicle static gain from driver input to yaw rate differs from the uncontrolled one at higher speed. The closed loop system shows the advantages of both active front and rear steering control: higher controllability, enlarged bandwidth for the yaw rate dynamics, suppressed resonances, new stable cornering manoeuvres, enlarged stability regions, reduced lateral speed and improved manoeuvrability; in addition comfort is improved since the phase lag between lateral acceleration and yaw rate is reduced.
For the designed control law a robustness analysis is presented with respect to system failures, driver step inputs and critical car parameters such as mass, moment of inertia and front and rear cornering stiffness coefficients. Several simulations are carried out on a higher order experimentally validated nonlinear dynamical model to confirm the analysis and to explore the robustness with respect to unmodelled dynamics. 相似文献
The main contribution of this paper is to show that a combined decentralized proportional active front steering control and proportional-integral active rear steering control from the yaw rate tracking error can assign the eigenvalues of the linearised single track steering dynamics, without lateral speed measurements, using a standard single track car model with nonlinear tire characteristics and a non-linear first-order reference model for the yaw rate dynamics driven by the driver steering wheel input. By choosing a suitable nonlinear reference model it is shown that the responses to driver step inputs tend to zero (or reduced) lateral speed for any value of longitudinal speed: in this case the resulting controlled vehicle static gain from driver input to yaw rate differs from the uncontrolled one at higher speed. The closed loop system shows the advantages of both active front and rear steering control: higher controllability, enlarged bandwidth for the yaw rate dynamics, suppressed resonances, new stable cornering manoeuvres, enlarged stability regions, reduced lateral speed and improved manoeuvrability; in addition comfort is improved since the phase lag between lateral acceleration and yaw rate is reduced.
For the designed control law a robustness analysis is presented with respect to system failures, driver step inputs and critical car parameters such as mass, moment of inertia and front and rear cornering stiffness coefficients. Several simulations are carried out on a higher order experimentally validated nonlinear dynamical model to confirm the analysis and to explore the robustness with respect to unmodelled dynamics. 相似文献