基于CarSim仿真的汽车底盘稳定性分析

为提高汽车在不同行驶工况下具有良好的稳定性，以汽车底盘为研究对象，通过在CarSim软件中搭建汽车整车动力系统模型，提出一种基于无模型自适应控制(Model-free adaptive control, MFAC)算法的汽车底盘侧向稳定系统控制方法。方法采用MFAC算法对汽车底盘侧向稳定系统进行控制，并通过计算以横摆角速度和质心侧偏角为控制变量的理想值，以及对横摆力矩进行控制与分配，实现了汽车底盘稳定性分析与控制。仿真结果表明，所提方法可在低附着系数和双开路面的不同行驶工况下，通过控制汽车底盘的侧向稳定系统提高汽车的稳定性，使汽车行驶更平稳和舒适。     

基于云技术的汽车排放气体测试仪自动检测系统的研究与设计

随着经济社会的快速发展，机动车的排放物给大气污染带来的威胁愈加严重。汽车排放气体分析仪是控制汽车尾气排放污染的有效工具。汽车排放气体分析仪测量结果的准确、可靠，对保护生态环境具有十分重要的意义。因此，设计了一种基于云技术的汽车排放气体测试仪自动检测系统。该系统能够实现汽车排放气体测试仪的现场自动检测，分析计算被检设备的示值误差、稳定性、重复性等检测结果，具有实时采集数据、实时分析计算检测数据、自动生成检测记录报告、通过图表等方式分析检测结果等功能，为汽车排放气体测试仪提供了高效的检测手段。     

我国汽车智能制动控制正在向VDC发展

近日，吉林大学汽车工程学院方泳龙教授在接受记者采访时说，国外目前的智能制动控制，已经由ABS发展到TCS（牵引力控制系统），又进一步发展到VDC（汽车动态控制系统）。VDC系统能够把汽车的制动、驱动、悬架、转向、发动机等各主要总成的控制系统，在功能、结构上有机的综合在一起。在系统安装中，增加汽车转向行驶时横向摆动的角速度传感器，通过控制内外、前后车轮的驱动力和制动力，确保汽车行驶的稳定状态。VDC的开发，使汽车的主动安全系统能够在大部分的工作状态下，都能对驾驶员提供主动的行驶安全保证。方泳龙说：“今后在汽车制动技术方面的研究，是通过CAN总线，把汽车在行驶过程中产生的信息共享，进行整个传动系统的控制。”     

基于CAN总线的混合动力汽车LCD仪表系统

研究设计了基于CAN总线的混合动力汽车LCD仪表系统的硬件电路和软件流程。该系统具有仪表显示、故障诊断显示、车辆行驶参数记录与分析、数据保存与回放等功能,实现了汽车仪表的数字化与智能化。     

汽车活塞最终综合测试仪的研制

汽车活塞最终综合测试仪是对汽车发动机活塞的综合参数进行自动检测的仪器。介绍基基本设计原理，机械，电路及等部分的设计难点和创新点。     

基于CAN总线的汽车综合性能嵌入式计算机测控系统

在分析汽车综合性能测控系统基础上,针对汽车检测设备现有状况,采用CAN总线方式,使用ARM控制器作为工位机实现了对汽车综合性能的自动检测与控制.详细介绍了该系统的工作原理、控制流程和软件设计.应用结果表明,这种方案成本低,可靠性高,更能满足汽车综合性能检测实际的需要.     

嵌入式系统在远程复位控制中的应用

介绍了基于嵌入式系统在远程复位控制器中的研制与实现.系统采用AT89C52单片机作为控制核心,MT8870为音频解码芯片,以PSTN公话网为信号传输控制介质.系统包括语音电路、自动检测和摘机挂机电路,驱动电路等单元,着重描述了该系统的各模块组成、原理及具体的电路实现,该系统通用性较强,在实际应用中收到了很好的效果.     

MOTOMAN机器人焊接系统在轿车底盘车桥零部件制造中的应用和发展

一、轿车底盘车桥零部件概述 轿车底盘车桥是汽车非常重要的零部件，轿车底盘车桥零部件主要包括汽车的前副车架、后副车架、左右控制臂、拉杆、发动机支架等。这些零部件安装在汽车底盘上，是连接汽车车身和汽车驱动系统的重要部件，对汽车行驶的安全性、稳定性，舒适性的性能起着至关重要的作用。如下图所示：     

汽车综合性能微机自动检测系统

汽车综合性能检测，对保证交通安全、加强环境保护、提高运输能力和降低生产成本都具有重要意义。本文介绍了汽车综合性能微机自动检测系统的基本组成和硬件配制。并对系统的工作特点进行了说明。     

一个汽车行驶记录系统的设计与实现

汽车行驶记录仪作为一种降低交通事故的发生率,规范和保障驾驶人员的行为和权益,方便交通管理部门执法检查和事故责任认定,提高运营单位对司乘人员和车辆的监督管理的一种重要手段,越来越得到人们的关注和重视.汽车行驶记录系统是记录仪的重要配套软件.它的主要功能是完成对汽车行驶信息进行数据的接收,分析与处理.本文给出了汽车行驶记录系统的工作原理、硬件模型和C#.NET下的设计与实现.     

Shared Control of Highly Automated Vehicles Using Steer-By-Wire Systems

A shared control of highly automated Steer-by-Wire system is proposed for cooperative driving between the driver and vehicle in the face of driver's abnormal driving. A fault detection scheme is designed to detect the abnormal driving behaviour and transfer the control of the car to the automatic system designed based on a fault tolerant model predictive control (MPC) controller driving the vehicle along an optimal safe path. The proposed concept and control algorithm are tested in a number of scenarios representing intersection, lane change and different types of driver's abnormal behaviour. The simulation results show the feasibility and effectiveness of the proposed method.      

汽车驾驶模拟器控制系统的研制

本文介绍了汽车驾驶模拟器控制系统的研制。该系统实现了点火、方向盘总成、离合器、脚刹、油门、手刹、换档等装置状态的检测和驱动仪表总成等功能。为了及时准确的检测信号和驱动仪表,该系统采用了多片单片机。经过检验,该系统运行良好,能准确实现信号检测和仪表驱动。     

基于FPGA的步进电机驱动控制系统设计

针对步进电机启动时会造成丢步、停止时会发生过冲的问题,提出了一种采用FPGA实现步进电机速度控制的方法,建立了步进电机驱动控制系统.该系统采用“软启软停”算法实现步进电机速度控制,可防止丢步和过冲,提高工作频率;并且实现步进电机上电复位功能和掉电检测功能,可防止上电误操作.整个系统通过网络进行通信,实现了网络化管理.最后将此步进电机驱动控制系统应用于光学系统中,应用结果表明了该方法的可行性.     

智能车辆控制系统PID算法的设计

在行驶过程中,智能车辆需要不停的检测前方道路信息以及自身的行驶信息。在检测过程中有许多复杂信息需要采集,并有多种干扰因素需要抗拒。将检测到的道路信息与自身行驶信息相结合,来确定下一步动作。在工程实际中,应用最为广泛的调节控制规律为比例、积分、微分控制,简称P I D控制,它以其结构简单、稳定性好、工作可靠、调整方便而成为工业控制的主流技术之一。本文采用超声波测位和无线通信实现两辆车安全地交替超车,具有很高的稳定性和快速性。在硬件上采用基于P W M技术的H型桥式驱动电路,解决了电机驱动的效率问题,这种设计能实现对电动车的运动状态进行实时监控,控制灵活、精度高,以实现小车的智能化设计,来满足对系统的各项要求。     

Motion planning for mobile robots using a laser range finder

We have designed a mobile robot with a distribution structure for intelligent life space. The mobile robot was constructed using an aluminum frame. The mobile robot has the shape of a cylinder, and its diameter, height, and weight are 40 cm, 80 cm, and 40 kg, respectively. There are six systems in the mobile robot, including structure, an obstacle avoidance and driving system, a software development system, a detection module system, a remote supervision system, and others. In the obstacle avoidance and driving system, we use an NI motion control card to drive two DC servomotors in the mobile robot, and detect obstacles using a laser range finder and a laser positioning system. Finally, we control the mobile robot using an NI motion control card and a MAXON driver according to the programmed trajectory. The mobile robot can avoid obstacles using the laser range finder, and follow the programmed trajectory. We developed the user interface with four functions for the mobile robot. In the security system, we designed module-based security devices to detect dangerous events and transmit the detection results to the mobile robot using a wireless RF interface. The mobile robot can move to the event position using the laser positioning system.     

Drivers' and non-drivers' performance in a change detection task with static driving scenes: is there a benefit of experience?

The ‘looked-but-failed-to-see’ phenomenon is crucial to driving safety. Previous research utilising change detection tasks related to driving has reported inconsistent effects of driver experience on the ability to detect changes in static driving scenes. Reviewing these conflicting results, we suggest that drivers' increased ability to detect changes will only appear when the task requires a pattern of visual attention distribution typical of actual driving. By adding a distant fixation point on the road image, we developed a modified change blindness paradigm and measured detection performance of drivers and non-drivers. Drivers performed better than non-drivers only in scenes with a fixation point. Furthermore, experience effect interacted with the location of the change and the relevance of the change to driving. These results suggest that learning associated with driving experience reflects increased skill in the efficient distribution of visual attention across both the central focus area and peripheral objects.     

MCGS在大型变压器风冷监控系统中的应用

介绍基于MCGS和PLC控制的大型变压器数字智能风冷系统,利用MCGS的强大数据处理和图形表现能力,实现对数据的集中管理、自动控制、故障检测等多方面的远程监控功能,使主变风冷控制系统具有更高的可靠性和更加完备的功能。实践证明该设计能达到智能控制和远程监控的目标,为系统的连续、稳定、安全运行提供了保证,实现了无人值守。     

基于磁致伸缩器扫频振动的禽蛋检测流水线系统

针对禽蛋运输及储存过程中造成裂纹、散黄等品质问题,设计一种基于磁致伸缩器扫频振动的禽蛋品质检测流水线系统,主要包括机械结构、传感与控制电路以及上位机软件系统.其中驱动电路控制流水线运行,到位检测传感器检测到禽蛋后控制磁致伸缩器对禽蛋进行扫频激振,同时通过麦克风采集禽蛋振动声音,并对采集的音频信号进行Yule-Walker功率谱分析和广义回归神经网络(GRNN,generalized regression neural network)建模,基于LabWindows/CVI开发的上位机软件系统实现禽蛋检测流水线的测控及禽蛋品质辨识和分类.实验表明,所设计的基于磁致伸缩器扫频振动的禽蛋检测流水线系统能够在线高效检测正常蛋、裂纹蛋和散黄蛋,检测速度约1枚/s.     

Using failure detection and diagnosis methods to detect dangerous evolutions of the driver behaviour

This paper deals with the application of techniques coming from reliability centred maintenance to detect time evolutions in systems where a human operator has a permanent role in the control loop. It describes the problems raised by such systems and proposes an approach of solution based on the characterisation of different running states of the system using exploratory data analysis techniques. An application of this approach is presented in the context of simulated car driving.     

A Review of:“The Remembering Self: Construction and Accuracy in the Self-narrative”, edited by ULRIC NEISSER and ROBYN FIVUSH,Cambridge University Press,New York (1994), pp. x + 301, £30.00, ISBN 0-521-43194-8

Driving is a task that requires the timely detection of critical events and relevant changes in traffic circumstances. Adaptation of speed and safety margins allows drivers to control the time available to react to potential hazards. One of the basic safety margins in driving is the time headway preserved with respect to cars ahead. To avoid rear-end collisions, drivers have to detect decelerations of lead cars. It can be assumed that fast or abrupt decelerations of the lead car are detected faster than slow or gradual decelerations. Moreover, expected decelerations are presumably detected faster than unexpected decelerations. Drivers' responses to rather abrupt and more gradual decelerations of the lead were investigated in a driving simulator. Situational traffic cues were used to manipulate the driver's expectations. Drivers adjusted the timing of their responses very well to the level of deceleration of the lead car. If cues in the environment indicated that the lead car was likely to decelerate, drivers reacted faster. Moreover, drivers increased their headway before the lead car actually started to decelerate, which can be considered an anticipatory response. In general, anticipation allows drivers to maintain their preferred headway and control time pressure in driving.