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1.
1)通过一般的弯道时,选择先外侧后内侧再外侧的转弯路线。在转弯时,若想快速通过弯道又不希望产生太大的离心力,就必须充分利用道路的宽度,尽量以趋于直线的大弧度来转弯;所以,在转弯开始前要靠着弯道的外侧进入弯道。到中间的时候要靠着弯道的内侧行驶,也就是说在弯道弧顶的地方应该紧靠着弯道的内侧行驶;在过了弯道弧顶之后,再切回弯道的外侧,靠着弯道的外侧驶出弯道,即过弯时要选择“外-内-外”的转弯路线。  相似文献   

2.
<正>拐弯是有技巧的,通常有6招必备的拐弯基本功。转弯路线:外侧—内侧—外侧在转弯时既想要快速通过弯道又不希望产生太大的离心力的话,就必须充分利用道路的宽度,尽量以趋于直线的大弧度来转弯,所以,在转弯开始前要靠着弯道的外侧进入弯道,到中间的时候要靠着弯道的内侧行驶,也就是说在弯道弧顶的地方应该紧靠着弯道的内侧行驶,在过了弯道弧顶之后,再切回弯道的外侧,靠着弯道的外侧驶出弯道,即过弯时要选择"外-内-外"的转弯路线。转弯原则:慢进中油快出还没有进入弯道仍保持直线行驶时,应该先踩刹车让车子减速,如果弯道比较大,则应该进一步降低车速,同时还需先降一挡;以低  相似文献   

3.
贾为民 《驾驶园》2010,(7):69-69
1、通过一般的弯道时,选择先外侧后内侧再外侧的转弯路线:在转弯时既想要快速通过弯道又不希望产生太大的离心力便转过弯道的话,就必须充分利用道路的宽度,尽量以趋于直线的大弧度来转弯,所以,在转弯开始前要沿着弯道的外侧进入弯道,到中间的时候要沿着弯道的内侧行驶,也就是说在弯道弧顶的地方应该紧沿着弯道的内侧行驶.  相似文献   

4.
李笑天 《驾驶园》2007,(4):50-51
转弯路线:外侧-内侧-外侧 在转弯时既想要快速通过弯道又不希望产生太大的离心力,就必须充分利用道路的宽度,尽量以趋于直线的大弧度来转弯,所以,在转弯开始前要靠着弯道的外侧进入,到中间的时候要靠着弯道的内侧行驶,也就是说在弯道弧顶的地方应该紧靠着弯道的内侧行驶,过了弯道弧项之后,再切回弯道的外侧,靠着弯道的外侧驶出,即转弯时要选择"外-内-外"的路线.  相似文献   

5.
弯道,按其道路情况可分为平曲弯线道(即平路转弯)、竖曲线弯道(即上下坡转弯)。汽车要安全、平稳地通过弯道,就要处理好两个问题:一是合理地选择车辆行驶路线,以保证行驶平稳;二是尽量选择较大的转弯半径,合理的控制好行车速度,使离心力降到最小。 平路转弯 汽车平路行驶时,由于道路阻力小,较易提高行驶速度,在运行速度较高时转弯会产生较大的离心力,急转弯就会产生更  相似文献   

6.
为保证车辆弯道行驶的安全,综合考虑影响车辆行驶安全的人、车、路和环境等因素,运用层次分析法和加权最小平方法建立多层次车辆弯道行驶安全度静态因素综合评价体系。基于车辆动力学理论分析车辆弯道行驶临界车速,通过引入安全系数k,将车辆弯道行驶安全度评价模型与临界车速结合,提出基于人车路协同的车辆弯道安全车速预测模型。仿真结果分析表明,该模型可预测车辆弯道行驶安全车速,为车辆弯道车速预警提供一种方法。  相似文献   

7.
车速的合理选择,是影响弯道行车安全的关键.为此,针对车辆在弯道行驶过程中因超速导致的侧滑、侧翻等侧向失稳事故,通过建立车辆转向行驶动力学模型,结合道路环境信息,在分析车辆转向时载荷横向偏移、悬架变形等基础之上,对传统模型进行改进,建立精度更高的弯道安全车速计算模型.并采用车辆动力学仿真软件CarSim和TruckSim进行不同工况下的仿真试验验证.运用正交试验方法对试验结果进行极差和方差分析,获取弯道安全车速对7种主要影响因素的敏感度.结果表明,该模型所得的安全车速值,与车辆侧向失稳时的临界车速值之间的平均误差为1.55%;相比于其他因素,弯道半径和路面附着系数对安全车速的影响最为显著;当路面附着系数达到特定值时,模型考虑了车辆的侧翻危险,使其计算得到的弯道安全车速呈现饱和现象.   相似文献   

8.
平曲线路段是交通事故高发之处。文中从车、路协同作用对车辆弯道行驶安全性的影响入手,分析了车、路中对弯道行驶安全性可能产生影响的因素,探究不同参数车辆与弯道组合下安全车速的限值。应用TruckSim建立车路耦合模型,通过仿真定性分析了各因素对车辆弯道行驶安全的影响;对不同车、路参数进行正交仿真试验,得出相应临界车速;再利用SPSS对试验结果进行方差分析,筛选出主要影响因素,并对其进行回归分析,建立其与安全车速之间的数学模型,用于计算车辆弯道行驶安全速度,指导车辆和道路设计。  相似文献   

9.
操作要领 (1)平路转弯.汽车平路行驶时,由于道路阻力小,比较容易提高行驶速度,在运行速度较高时转弯会产生较大的离心力,急转弯会产生更大的离心力,这样不仅会影响汽车的平顺性,严重时会造成翻车事故.因此正确的操作应是根据车速、弯道曲率半径,在进入弯道前放松加速踏板,使汽车平稳降速行驶.若视线不良,弯道曲率半径较小,则要使车辆靠车道的外侧运行,即右转弯时汽车接近道路中心线行驶.  相似文献   

10.
汽车转弯驾驶是汽车驾驶中不可缺少的重要内容之一.汽车行驶中经常要遇到各种弯道和障碍而需要改变行驶方向,汽车转弯行驶,要靠转动方向盘改变前轮的方向,靠差速器的作用改变左、右驱动轮的转速来实现转弯.  相似文献   

11.
Two nonlinear lateral control algorithms are designed for a tractor-semitrailer type commercial heavy vehicle. The baseline steering control algorithm is designed utilizing input-output linearization. To enhance the lateral stability and furthermore reduce tracking errors of the trailer, braking forces are independently controlled on the inner and outer wheels of the trailer. The coordinated steering and braking control algorithm is designed based on the multivariable backstepping technique. Simulations conducted using the complex model show that the trailer yaw errors under coordinated steering and independent braking force control are much smaller than those without independent braking force control.  相似文献   

12.
Lateral Control of Commercial Heavy Vehicles   总被引:9,自引:0,他引:9  
Two nonlinear lateral control algorithms are designed for a tractor-semitrailer type commercial heavy vehicle. The baseline steering control algorithm is designed utilizing input-output linearization. To enhance the lateral stability and furthermore reduce tracking errors of the trailer, braking forces are independently controlled on the inner and outer wheels of the trailer. The coordinated steering and braking control algorithm is designed based on the multivariable backstepping technique. Simulations conducted using the complex model show that the trailer yaw errors under coordinated steering and independent braking force control are much smaller than those without independent braking force control.  相似文献   

13.
《JSAE Review》1999,20(4):543-548
This paper investigates which different steering reactions are necessary by the driver to avoid obstacles driving a car with or without a trailer. For car and trailer complex 3D-models with nonlinear tyre characteristics are established. The driver modelling extends the well-known 2-level concept with an overruling 3rd level, that will be activated, if unexpected large driver reactions due to the large local path deviations are necessary. The results, comparing these different driver models for car and car–trailer, clearly show the consequences and advantages of the incorporation of a third, extensive reaction level and especially its importance for the car–trailer combination.  相似文献   

14.
LHZ25沥青混凝土转运车   总被引:1,自引:0,他引:1  
材料离析、非连续摊铺、自卸车卸料时对摊铺机撞击是造成沥青路面施工质量下降的重要因素,在路面施工机群中增加沥青混凝土转运车是改善沥青混凝土摊铺工艺的有效途径,从存在的问题着手介绍了LHZ25沥青混凝土转运车的结构和主要性能特点。  相似文献   

15.
现代轿车的前轿与后轿之间装设了轴间中央差速器,奥迪车所采用的为格力森公司设计的新型的托森差速器,详细介绍了奥迪用的托森差速器的结构,分析了汽车直线行驶状态和汽车转变行驶状态下托森差速器工作原理和工作过程,同时简要介绍了托森差速器的锁紧系统。  相似文献   

16.
陈东发  马力  谢婷婷 《专用汽车》2013,(11):102-105
设计了一种低平板组合挂车的分载系统,这种分载系统可以提高低平板组合挂车的承载能力,同时保证其拼车连接结构受到的载荷在标准范围之内。给出了分载系统的分载原理,进行了分载系统的结构设计,并利用ANSYS软件对典型车辆进行了有限元分析,对分载系统进行了强度计算,结果表明所设计的分载系统是可行和有效的。最后,对分载系统的支座进行了拓扑优化设计。  相似文献   

17.
The real-time simulation of vehicle trains requires an accurate and numerically feasible representation of the vehicle–trailer coupling. Although the equations of motion for the chassis instances can be reduced to systems of ordinary differential equations, additional constraints on the relative motion of vehicle and trailer are introduced when considering the hitch. In this article, we present a strategy for the simulation of vehicle–trailer combinations, where the algebraic constraints of the coupling are treated explicitly. Although this approach allows exact modeling of the respective joint geometry and realistic calculation of the coupling forces, a suitable numerical algorithm is required in order to solve the resulting differential-algebraic system of index 3 in real-time. The implementation in a commercial vehicle dynamics program is discussed and real-time simulation results are shown, which prove its feasibility for different coupling joints and demanding driving maneuvers.  相似文献   

18.
许沧粟  于洪波 《汽车工程》2006,28(4):366-369
提出利用联合制动系统将电涡流缓速器应用到铰接车辆上的方法。联合制动系统由拖车上的电涡流缓速器和挂车电控制动系统组成,二者在ECU控制下可以保证拖车与挂车制动力的合理分配以及对拖车及挂车的制动实施时间进行干预。采用该系统还可以减少铰接车辆行驶中某些事故的发生。  相似文献   

19.
Steady and Transient Turning of Tractor-Semitrailer and Truck-Trailer Combinations: A Linear Analysis

A simplified analysis is made of the yaw stability and control of the two types of the commercial vehicle combinations (tractor-semitrailer, truck-trailer) at a constant forward velocity during steady and transient turning. The combined vehicle is treated as a linear dynamic system (Fig. 2). The steer angle at the front wheels of the tractor (or truck) and the steady-state responses if the road verhicle train (yaw rate, articulation angles and sideslip angle) are calculated (Equations 18 to 25). Exploratory calculations are performed to determine the influence of the cornering stiffness of the tires for the two types of the vehicle combinations upon the steady-state responses (Figs. 7 to 10). For a linear simplified model of articulated vehicle the steady-state turning behaviour is stable also under conditions of rather high driving speed (70 km/h). A simplified analysis of the transient turning behaviour of the two types of road trains has shown the tractor-semitrailer to preserve stability even under driving speeds exceeding 70 km/h (Fig. 13), whereas the truck-trailer combinations appear to become oscillatory unstable if the driving speed rises above the 60 km/h margin (Fig. 14).  相似文献   

20.
全挂车轮转向装置设计   总被引:1,自引:0,他引:1  
全挂车转向装置分为轴转向和轮转向两种形式,由于轮转向两种形式。由于轮转向装置转向角度小,制造工艺复杂。成本高,一般较少应用。便全挂车采用轮转向装置可降低车厢地板高度,且其机动性较轴转向全挂列车好,推导了轮转向传动连杆机构的解析关系式及优化设计目标函数和约束条件,并给出了相应算例。  相似文献   

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