复杂曲面汽车车身设计可视化网络开发环境的实现

本文讨论复杂曲面汽车车身可视化设计环境的具体实现。在使设计师充分掌握、便捷使用相关信息的原则下，以实现以相似类比的方法完成汽车车身的几何建模和动力学分析的紧密结合，设计了要求的开发环境的具体功能及有关模块的分配，并指出以基于Web的Internet/Intranet网络技术来实现可视化车身设计环境和CAD／CAE信息集成是可行的，且有兼容性好、易于加入全球虚拟企业网等优点。     

汽车车身设计CAD/CAE信息集成系统中Oracle数据库的设计研究

论文通过现代汽车车身工程中的CAD用户、CAE用户、管理人员对CAD／CAE信息集成系统数据需求的分析，从面向车身工程的现实世界出发进行数据库概念设计、逻辑设计和物理设计，实现了汽车车身设计CAD／CAE信息系统数据库从现实世界模型向数据库逻辑模型的转化及实现。     

面向白车身制造的质量信息流管理

为了对整个车身制造过程实施快速、准确的控制，提出了基于数据驱动的面向白车身制造的质量信息流管理体系，实现了车身制造质量信息的数字化、网络化和智能化．论述了质量信息流管理系统的建立以及各信息模块的功能：通过实际质量案例分析表明，所建立的质量信息流管理系统可及时发现并解决质量问题。     

轻型客车车身结构设计CAD/CAE信息集成系统

本文结合具体应用建立了轻型客车车身结构设计ＣＡＤ／ＣＡＥ信息集成系统，提出了符合国情的车身设计ＣＡＤ／ＣＡＥ仿真集成系统模型，建立了系统结构的ＩＤＥＦ０模型和系统工程数据库的不Ｘ模型，此信息集成系统的建立为并行工程在车身设计中的应用提供了可能，可加快车身开放速度，并提高我国汽车车身自主开发能力。     

基于特征的汽车车身几何建模与车身内布置概念设计系统的研究

文章针对我国现行车身设计中存在的问题，提出在车身设计中建立基于物质特征的统一三维产品模型，以实现车身设计到模具制造的计算机集成；将智能技术和优化技术纳入车身内部布置设计中，并在计算机上实现了车身内部布置的概念设计系统。     

白车身测量数据管理平台的开发和应用

结合白车身制造过程中测量技术的发展趋势,研究了基于白车身测量数据的数字化管理平台,开发了一套从白车身测点规划到测量数据的应用的全面化的智能管理平台,以轻量化的三维模型为测量信息载体,通过自主编程实现了白车身测量数据管理的智能化,实现了白车身从测点规划、零件数模到末端的测量数据的管理,使得测量展示三维化,分析多维化,有效的缩短了车身的测量结果展示周期,提升了车身测量数据管理的效率,提高了白车身质量,在企业的实际应用中取得了良好的反馈和效果。     

国产客车车身周围流场数值模拟的空间离散

在对国产客车车身周围二维流场空间离散研究的基础上，采用代数和椭圆型方程相结合的方法，对国产客车车身周围三维空间进行单元划分。为提高单元划分质量，提出适合客车车身周围空间单元划分的“指数密度控制方法”。利用抛物化的椭圆型方程，提高了网络单元的划分速度。为了优化节点编号，提出“最少节点数阵面推进法”，同时实现了单元节点信息的自动生成。     

激光打标技术在汽车焊装生产线上的应用

为实现汽车白车身焊接产品在焊接生产过程中的可追溯性,利用西门子1517F系列安全型CPU核心进行控制,构建PROFINET网络进行信息通讯,采用专业的激光打标机作为产品信息标靶的打标设备。应用结果表明,利用PLC自动控制的激光打标工艺可以满足汽车焊装生产的高速性和稳定性,能够实现车身焊装产品在生产过程中的可追溯性。     

汽车车身柔性装焊生产线探讨

阐述了建立汽车车身柔性生产线的必要性，指出了车身装焊生产线是汽车车身柔性生产的关键，从工艺设备、工装夹具、机械化输送及自动控制几个方面控制实现柔性汽车装焊生产线的措施。分析了柔性装焊生产线－车身生产发展的趋势，论证了计算机是实现柔性自动控制的核心。     

如何恢复汽车钢板的性能

现代汽车车身的发展趋势是越来越轻，越来越安全。要达到这一目的，汽车制造厂商通常采用提高钢板强度和降低钢板厚度，或者是开发新材料车身来实现。新材料车身（如全铝合金车身）由于制造工艺复杂、成本高等原因，只有少数高档车采用，所以现时应用最广泛的还是钢制车身。大家都会有一个共识，那就是日本车省油。其实省油的原因一是发动机，二是车身设计，[第一段]     

差分GNSS倾斜摄影在山区公路勘察设计中的应用

采用差分GNSS提高飞行POS精度,对带有高精度POS信息的影像进行空三影像匹配与平差运算,讨论同一区域采用不同数量像控点,参与空三平差对空三精度和最终生成的倾斜三维模型精度的影响,并总结出外业航飞像控点布设方案;利用倾斜实景三维模型进行山区不良地质体识别,建立基于机器学习的地质识别与风险评价系统,构造包含多种不同信息的综合三维地质模型。     

基于RMA方法的汽车车身CAN总线优化设计

针对汽车车身控制信息的高实时性和车身CAN系统扩充的高灵活性等特殊要求,介绍用于实时系统分析的速率单调分析(RMA)方法,在原总线利用率、信息最坏响应时间等实时性指标基础上引入总线扩展灵活性因子进行车身CAN总线方案的寻优设计,并以典型汽车车身控制系统为例,对单信号方案和信号组合方案进行实时性和扩展灵活性对比分析,在线试验结果验证了理论分析数据的正确性。     

基于免疫算法的汽车主动悬架控制研究

应用免疫算法理论,以车身垂直加速度、悬架动行程和车轮动载为控制目标,设计了基于汽车1/4模型的主动悬架控制策略。该算法利用信息熵作为评价抗体亲和力的指标,具有多样识别能力、强鲁棒性和免疫记忆功能。仿真结果表明,基于免疫控制器的主动悬架对汽车的平顺性和操纵稳定性有较明显的改善。     

Road Vehicle Suspension System Design - a review

Based mainly on English language literature, information relating to the design of automobile suspension systems for ride comfort and control of wheel load variations for frequencies below body structure resonances is reviewed. The information is interpreted in the context of vehicles which travel through a wide speed range on roads of markedly differing quality, which do so carrying different loads and which are required to possess good handling qualities.

Sections are devoted to describing road surfaces, modelling vehicles and setting up performance criteria, and to passive, active, semi-active and slow-active system types. Methods for deriving active system control laws are outlined. Strengths and weaknesses of the various systems are identified and their relative performance capabilities and equipment requirements are discussed. Attention is given to adaptation of the suspension or control system parameters to changing conditions. Remaining research needs are considered.     

Road Vehicle Suspension System Design - a review

SUMMARY

Based mainly on English language literature, information relating to the design of automobile suspension systems for ride comfort and control of wheel load variations for frequencies below body structure resonances is reviewed. The information is interpreted in the context of vehicles which travel through a wide speed range on roads of markedly differing quality, which do so carrying different loads and which are required to possess good handling qualities.

Sections are devoted to describing road surfaces, modelling vehicles and setting up performance criteria, and to passive, active, semi-active and slow-active system types. Methods for deriving active system control laws are outlined. Strengths and weaknesses of the various systems are identified and their relative performance capabilities and equipment requirements are discussed. Attention is given to adaptation of the suspension or control system parameters to changing conditions. Remaining research needs are considered.     

基于人体损伤特征信息的人车碰撞事故车速分析研究

综合国内外的相关实验、仿真与统计研究进展,基于人体损伤与碰撞速度之间的关系特点,对人车碰撞事故的车速分析方法进行研究。根据交通事故人体损伤的特点,构建了人体损伤特征参数及其描述模型,将损伤分为脏器损伤和骨折两部分进行描述及评分。利用统计、再现等方法探寻头部的MAIS值、HIC值与车辆碰撞速度三者之间的相关性联系,构建了MAIS-HIC-v综合模型,以此为基础建立了车速分析模型,开发了人车碰撞事故车速分析模块,可根据事故现场信息特点选择适当的计算方法,结合人体损伤信息进行车速分析。     

Development of knowledge based body structure concept design model

The purpose of this study is to propose a concept design process for an automotive body structure using technical information on the major joints and members of vehicles. First, in order to collect the technical information on major joints and members, 17 vehicles were selected using benchmark data. The collected technical information for the selected vehicles was the cross sectional shapes of each joint and member which were used for the analysis of joint stiffness, crashworthiness and static stiffness of the member to make a database along with cross section properties. This study applied a ‘What If Study’ technique to perform a concept design of an automotive body using the analyzed information and selected cross section meeting the design objectives. The criteria for the selection of the cross section were defined by subdividing the defined design objectives of an automotive body structure and constraints into members and joints. In order to configure an analysis model of an automotive body structure using the selected cross section, a shape parametric model was used and static stiffness, dynamic stiffness and crashworthiness were assessed to evaluate the configured automotive body structure. The evaluation result showed that the crashworthiness and static/dynamic stiffness were improved compared to an existing body structure. In addition, the weight of the body structure was reduced. Through this study, the process that can rapidly and effectively derive and evaluate the concept design of an automotive body structure was defined. It is expected that, henceforth, this process will be helpful for the study of automotive body structures.     

乘用车侧门安全性试验台的研制

介绍了乘用车侧门安全性试验台的工作原理、技术性能及总体设计方案。针对该试验台在设计时存在的技术问题进行了阐述。所设计的试验台具备多种控制方法和结构安装参数可调,不但涵盖了侧门强度测试的功能,还可用于其它零部件的试验。该试验台能实时显示被测车辆变形所吸收的能量等信息,采用图象三维测量法来测量车身刚度（变形矢量）。     

Active Suspension Control; Performance Comparisons Using Control Laws Applied to a Full Vehicle Model

Based on a mathematical model of an actively suspended vehicle, the effects of the following issues in deriving the control laws are studied:

(a)representation of the ground surface as integrated or filtered white noise.

(b)cross-correlation between left and right track inputs.

(c)wheelbase time delay between front and rear inputs.

The third of these issues is shown to be by far the most important. Considerable improvements at the rear suspension can be obtained if the control law includes the information that the rear input is simply a delayed version of the front input. Effectively this provides feedforward terms in the control law for the rear actuator. For the full state feedback case, these improvements are indicated by reductions in the rear body acceleration and rear dynamic tyre load of around 20% and 40% respectively with no increase in suspension working space.     

概念展车车身制作工艺及质量控制方案

文章介绍了概念展车车身制作工艺及质量控制方法,阐述了基础车身改制的技术难点及解决方法,形成了一套有效的制作工艺流程和质量管控手段;通过在广汽集团多款概念展车上的实际应用效果,得到了充分的验证,该方法能够在短时间内、用较低的费用制作出满足强度、精度等技术要求的车身,可以为概念展车车身制作验证提供参考依据。