汽车驱动防滑控制硬件在环仿真系统设计

利用 Matlab 中的 Simulink/RTW/xPC target 一体化开发工具构建了车辆驱动防滑控制硬件在环仿真平台,并基于单片机设计了驱动防滑电控单元的硬件电路和控制程序。针对几种典型工况进行半实物仿真,验证电控单元硬件以及控制程序的控制效果。     

电动汽车驱动防滑控制系统(ASR)的研究

本文介绍了一种新型电动汽车的驱动防滑控制系统(ASR)、对所建立的简化电动汽车驱动模型,采用模糊PD控制算法对左右两侧驱动轮单独控制,应用此算法可使各车轮的滑转率控制在最佳滑转率附近。此系统已在Matlab上进行仿真试验,仿真结果证明,在电动汽车高速直线行驶在不同附着系数的路面的情况下,按此算法设计的驱动防滑控制系统,能显著提高汽车的安全性和稳定性。     

汽车发动机电控单元高速CAN通讯模块研制

CAN总线作为一种优秀的现场总线,已经越来越多地应用于汽车电子系统.提出了基于CAN总线的汽车发动机电控单元高速CAN适配模块设计方案,介绍了系统主要硬件结构和软件设计流程.系统硬件测试表明,该系统能对发动机各类参数进行高速实时监测,并且通过对重要参数的修改可以实现对系统的检测和控制功能.实验表明该系统具有通讯速率高和可靠性强等优点,具有广泛的应用前景.     

基于J1939协议的重型卡车CAN总线应用研究

CAN总线的应用体现了电控系统优势,优化了整车性能.在某一自主研发的重型卡车上应用了CAN总线,采用J1939协议.连接发动机、ABS、组合仪表以及安全气囊,通过网络进行控制和信息交流,大大的提升了整车性能.通过对J1939协议的研究,对各节点的发送报文进行了定义.通过对ABS/ASR的控制过程的研究确定其同发动机通讯的控制时序和报文发送的数据.同时结合开发流程设计了三个步骤的测试方法.     

轿车ASR的ADAMS/CAR和MATLAB联合仿真

利用机械动力学仿真软件ADAMS／CAR建立JETTA CTX轿车整车动力学模型,充分考虑影响车辆驱动过程的各种因素,对难以描述的部分采用基于实验的半经验模型,通过输入输出接口实现同MATLAB的通信,基于SIMULINK建立ASR控制系统模型进行对开路面联合仿真,通过对仿真结果数据的处理和分析验证模型的合理性,使用该模型可以对各种工况下ASR控制过程中车辆的动态特性进行研究,为加快开发ASR控制逻辑提供了理论依据。     

汽车驱动防滑系统制动压力干预模式仿真研究

基于Matlab/Simulink的15自由度汽车动力学仿真平台,仿真研究了汽车驱动防滑控制系统中不同制动压力干预模式的控制效果和控制规律,包括以滑转率为控制量、以轮加速度为控制量以及结合使用这两种控制量的制动压力干预模式,给出了各种压力干预模式的具有较好控制效果的仿真实例,并对基本干预模式的控制效果进行了实车试验,验证了仿真模型的正确性和控制方法的有效性.为实际控制策略的开发提供了控制策略的原型并为实际匹配中调整控制策略提供了理论依据.     

基于CAN/LIN总线的汽车通信网络设计

随着人们对汽车各方面要求的不断提高,汽车上的电控系统数量越来越多,随之产生诸如电路复杂性增加、可靠性下降、生产成本增加等问题.为解决上述问题文中提出了一种基于CAN总线和LIN总线技术的现代汽车通信网络的低成本设计方案.设计中将CAN总线技术用于高速的驱动系统中,将LIN总线技术(其节点成本是CAN的1/3～1/2)用于低速的车身系统中,在器件选型上采用了PHILIPS和FREESCALE的典型汽车电子芯片,既实现了应有的网络控制功能,同时也降低了车辆电子系统的开发、生产和服务成本,具有较高的实用性.     

基于制动控制的汽车驱动防滑系统

基于MC9S12DP256微处理芯片,开发了由制动控制的汽车驱动防滑控制系统,详细描述了该系统的工作原理、硬件电路和软件控制逻辑.试验表明,该系统能够将驱动轮的滑转率控制在理想范围内,有效地提高汽车在低附着路面的加速性和安全性.     

基于CAN/LIN总线的车载通信网络设计

随着汽车上的电控系统数量越来越多,各系统之间大量的数据通信会产生诸如电路复杂、线束增加、可靠性下降等问题.本设计提出了一种基于CAN/LIN总线的车载通信网络的低成本解决方案,其中将CAN总线网络应用在高速驱动系统,LIN总线网络应用在低速的车身控制系统,两者通过网关进行数据交换.经过测试,本车载通信网络设计合理,通信可靠,能够实现CAN/LIN数据的透明传输.     

基于CAN／LIN总线的汽车通信网络设计

随着人们对汽车各方面要求的不断提高，汽车上的电控系统数量越来越多，随之产生诸如电路复杂性增加、可靠性下降、生产成本增加等问题。为解决上述问题文中提出了一种基于CAN总线和LIN总线技术的现代汽车通信网络的低成本设计方案。设计中将CAN总线技术用于高速的驱动系统中，将LIN总线技术（其节点成本是CAN的1／3～1／2）用于低速的车身系统中，在器件选型上采用了PHILIPS和FREESCALE的典型汽车电子芯片，既实现了应有的网络控制功能，同时也降低了车辆电子系统的开发、生产和服务成本，具有较高的实用性。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.