小标志 大文章——206的天籁之音

I.C.E.在国外改装界里是一个常见的单词。那么什么是I.C.E.（In Car Entertainment），翻译就是“车内娱乐系统”。当然我们世俗眼中的“车内娱乐”不外乎CD机，MP3机和收音机了，真正的I.C.E.可不仅令局限于拥有这些系统，而是真正的让它们能够“烧”起来。今天我们的主角标志206要给我们诠释一下I.C.E.的真谛。有了I.C.E.内涵的206不忘Style，全面武装WRC版外观套件，最终打造了“京城第一拉力版206”。     

世界汽车塑料材料技术的若干新进展

在节能.安全.环保和成本等因素推动下,塑料及其复合材料技术一直在朝着高性能(高弹性模量.高强度.耐热.耐磨.耐火.抗老化).低污染.低密度.低成本的方向发展.介绍了国外在汽车塑料及其复合材料领域所取得的若干最新进展及未来技术发展动向.     

信息简讯

●安徽叉车集团荣立2009年度全球工业车辆第8强美国《现代物料搬运》杂志(MMH)依照世界范围内各机动工业车辆公司最近财政年度内方面的收入进行排名,全球前20强工业车辆供应商排行如下:1.丰田2.凯傲集团3.永恒力集团4.科朗设备5.纳科实业6.三菱-卡特彼勒7.小松叉车8.安徽叉车集团9.日产10.TCM 11.日本输送机株式会社12.斗山重工13.克拉克14.曼尼通15.浙江杭叉16.现代重工17.台励福18.康姆比19.上海梯佑20.胡比特克斯     

压缩空气供气系统

1 方案及技术要求 (1)现场环境 a.海拔高度:<1 000 m. b.环境温度:0～40℃. c.空气相对湿度:≤90%. d.抗震设防烈度:7度.     

雷诺发布新一代梅甘娜R.S.TROPHY车型

2011年6月16日,雷诺汽车发布了新一代梅甘娜R.S.Trophy,作为梅甘娜R.S.系列的顶级车型,梅甘娜R.S.Trophy的驾驭性能更为卓越。该车型计划限量生产500辆,     

骏捷怠速问题的解决方法

我的骏捷是去年6月3日提的.刚提车时.怠速一点也感觉不到抖动.噪音也很小大约跑到4000多公里时.发现等红灯或堵车时发动机的震动较大.导致座位和方向盘能明显地感到抖动.并且噪音随之加大.尤其是开大灯时,抖动更为强烈.非常的令人不爽.有朋友坐车时,只好故意放大 CD 的音量.不想让大家对自     

乡村道路行车六防

时下.农村公路网已日趋稠密.特别是"村村通"公路的实现.纵横交锚的乡村道路与国.省道相互贯通.极大地缩短了城乡之间的距离。每到节假日或周末.开着私家车到乡下出游或寻访亲友是件再惬意不过的事情。但是.对于习惯整天驾车穿梭于城市道路的城里人而言.一旦驾车初入乡村道路.往往由于环境的突变而表现出种种不适.甚至可能诱发各种交通事故。为此.交通民警特将在乡村道路上安全行车的六个防范提醒给您——     

大众DSG故障车主调研报告

1.投诉来自全国27个省/直辖市,其中东部和南部是重灾区,或与大众声称的"温度与湿度"有关. 2.浙江省的投诉比重最高,占28％,其次是广东11％,江苏9％. 3.大众在西部地区销量一般,但投诉比重明显偏高,值得深思. 4.一汽大众大本营吉林省目前未收到一例投诉.     

摩托车工业研究室

摩托车工业研究室(MotorcycleIndustry Reseach Office.简称MIRO)成立于1988年是在原国家经贸委.原机械工业部的领导和支持下由中国汽车技术研究中心具体负责建立的.专门从事摩托车行业规划与政策研究.信息服务与软科学研究.期刊出版与资料编辑.数据资源与平台共建的机构为国家政府部门.行业协会组织和地方摩托车行业主管部门.生产企业及金融投资公司提供多方面的信息参考和决策支撑,     

先进安全车辆的第三只眼

在人与车的互动中.随着科技的进度.车辆本身不再只是一个听命行事的机器.过去电影情节中.可以随时保护驾驶者安全的"霹雳车——伙计".将会在未来的车阵中现身。在"霹雳车"的设计概念中.就是利用人工智能的技术,赋予车辆主动思考的能力.提供主动安全的服务。因此.所谓人类的灵魂之窗——眼睛.     

资江氮肥厂高架桥满堂现浇连续箱梁支架施工技术

资江氮肥厂高架桥0#-6#为预应力现浇连续箱梁,该连续箱梁位于岩溶严重发育地区,经过科学论证,决定采用钢管支架施工。本论述就钢管支架施工技术、质量控制及注意事项进行了介绍。     

A path-following driver–vehicle model with neuromuscular dynamics,including measured and simulated responses to a step in steering angle overlay

An existing driver–vehicle model with neuromuscular dynamics is improved in the areas of cognitive delay, intrinsic muscle dynamics and alpha–gamma co-activation. The model is used to investigate the influence of steering torque feedback and neuromuscular dynamics on the vehicle response to lateral force disturbances. When steering torque feedback is present, it is found that the longitudinal position of the lateral disturbance has a significant influence on whether the driver’s reflex response reinforces or attenuates the effect of the disturbance. The response to angle and torque overlay inputs to the steering system is also investigated. The presence of the steering torque feedback reduced the disturbing effect of torque overlay and angle overlay inputs. Reflex action reduced the disturbing effect of a torque overlay input, but increased the disturbing effect of an angle overlay input. Experiments on a driving simulator showed that measured handwheel angle response to an angle overlay input was consistent with the response predicted by the model with reflex action. However, there was significant intra- and inter-subject variability. The results highlight the significance of a driver’s neuromuscular dynamics in determining the vehicle response to disturbances.     

浅谈吉怀高速梁家院子隧道软弱围岩施工关键工艺

基于隧道施工过程中软弱围岩施工质量、安全控制十分困难。经长期对本软弱围岩隧道的现场施工管理,对软弱围岩的施工控制提出些许见解,并用工程实际情况予以证明。     

预应力曲线箱梁和异形箱梁的研究

近年来 ,国内外学者对曲线箱梁和异形箱梁的静力分析理论和计算方法作过大量的研究 ,但这些理论和方法在某种程度上都存在着一定的局限性 ,特别是在实际设计工作中 ,运用起来不能得心应手。为此本文在综合前人已取得经验下 ,针对桥梁结构设计中分析曲线箱梁、异形箱梁 ,经常遇到的难题进行了研究 ,建立一个较为完善的理论和方法 ,编制了等参元空间分析程序。在实际工程中进行实桥试验 ,验证了本文理论和方法的正确性。本文的研究工作更准确描述了箱梁的荷载响应 ,为设计人员提供直观的设计依据。对曲线箱梁和异形箱梁受力特性有了更一步的理解 ,并提出了新的见解     

汽车排气催化转化装置气流特性分析

运用计算流体动力学对汽车排气污染物控制装置———催化转换器进行了研究。通过对 4种不同引流区结构的速度场、压力场的计算 ,证明引流区的结构对催化转化装置的气流分布影响很大 ,应尽量避免采用直壁无引流过渡的结构 ,采用平滑过渡的引流区 ,不仅可减少涡流损失 ,而且压力损失大大小于其它结构。对实际汽车用催化转化器在不同排气流量下的速度场和压力损失进行了计算和对比。采用Ansys/FlotranCFD计算流体动力学软件 ,其计算结果与试验结果吻合较好 ,证明采用的方法是可靠的。     

Roll stabilisation of road vehicles using a variable stiffness suspension system

A variable stiffness architecture is used in the suspension system to counteract the body roll moment, thereby enhancing the roll stability of the vehicle. The variation of stiffness concept uses the ‘reciprocal actuation’ to effectively transfer energy between a vertical traditional strut and a horizontal oscillating control mass, thereby improving the energy dissipation of the overall suspension. The lateral dynamics of the system is developed using a bicycle model. The accompanying roll dynamics are also developed and validated using experimental data. The positions of the left and right control masses are sequentially allocated to reduce the effective body roll and roll rate. Simulation results show that the resulting variable stiffness suspension system has more than 50% improvement in roll response over the traditional constant stiffness counterparts. The simulation scenarios examined is the fishhook manoeuvre.     

汽车转弯制动性能的模拟计算

本文是一篇研究汽车转弯制动性能模拟计算方法的专题论文。首先建立了11自由度的汽车动力学模型,模拟转弯制动开环试验方法,建立了非线性微分方程组,其初始条件通过计算汽车作圆周运动时的稳态转向特性求出。文中详细地介绍了各有关参量的计算方法,然后用四阶龙格-库塔法求出微分方程组的数值解,因此能够详尽地描述和研究各重要参数的变化情况及其对转弯制动性能的影响。最后给出四个典型算例,用以说明计算的可信程度。     

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.     

The bricycle: a bicycle in zero gravity can be balanced or steered but not both

A bicycle or inverted pendulum can be balanced, that is kept nearly upright, by accelerating the base. This balance is achieved by steering on a bicycle. Simultaneously one can also control the lateral position of the base: changing of the track line of a bike or the position of hand under a balanced stick. We show here with theory and experiment that if the balance problem is removed, by making the system neutrally stable for balance, one cannot simultaneously maintain balance and control the position of the base. We made a bricycle, essentially a bicycle with springy training wheels. The stiffness of the training wheel suspension can be varied from near infinite, making the bricycle into a tricycle, to zero, making it effectively a bicycle. The springy training wheels effectively reduce or even negate gravity, at least for balance purposes. One might expect a smooth transition from tricycle to bicycle as the stiffness is varied, in terms of handling, balance and feel. Not so. At an intermediate stiffness, when gravity is effectively zeroed, riders can balance easily but no longer turn. Small turns cause an intolerable leaning. Thus there is a qualitative difference between bicycles and tricycles, a difference that cannot be met halfway.     

拥塞控制算法三例

拥塞是由通信量和资源之间的矛盾引起的，在象因特网这样的大型互联网络中，通信高峰时，容易出现拥塞。因为拥塞具有恶性循环的特点，因此避免拥塞一直是学者和工程技术人员探讨的问题。文章从理论上提出了三种简单易行的拥塞控制算法，其算法中所体现的思路可借鉴。