基于MATLAB的AUTOSAR自动代码生成技术

在系统介绍汽车开放系统架构AUTOSAR体系结构的基础之上,以汽车大灯控制模块的嵌入式软件应用层开发为实例,描述了符合AUTOSAR架构标准的控制系统嵌入式软件应用层的开发流程,以MATLAB/Simulink软件为起点,叙述了从建模仿真到代码生成的过程,为开发符合AUTOSAR标准框架的汽车电子控制系统的标准化软件、规范ECU的内部软件及其相应的接口提供了有力的实证。     

基于AUTOSAR模型的电控系统软件的集成实现

嵌入式软件的兼容性与可靠性成为汽车行业普遍关注的问题。本文结合汽车开放系统架构AUTOSAR,以MATLAB/Simulink软件为依托,叙述了一种AUTOSAR模型与非AUTOSAR架构的基础软件集成生成可执行程序的过渡集成实现方法,为开发符合AUTOSAR标准的电控系统嵌入式软件提供了参考。     

符合AUTOSAR规范的MCU驱动设计和实现

AUTOSAR是面向汽车领域的嵌入式软件体系结构标准,整体上分为应用层、RTE层和基础软件层。基础软件层包含系统服务、ECU抽象层和微控制器抽象层,硬件驱动程序的接口规范定义在ECU抽象层和微控制器抽象层中。根据AUTOSAR基础软件层规范,研究了符合AUTOSAR规范的底层驱动设计开发方法,并在MPC5634微控制器上,设计和实现了MCU的驱动程序。     

基于AUTOSAR标准的TCU软件设计

基于AUTOSAR汽车电子软件架构标准提出了湿式双离合变速箱控制单元(TCU)的嵌入式软件架构,并对其软件组件与接口层实时环境的配置进行了详细设计。测试结果表明,接口层实时环境配置实现了应用层软件与底层基础软件的分离,并通过AUTOSAR操作系统对TCU任务进行调度。     

道路车辆功能安全风险与控制研究

随着汽车电子技术的发展,特别是近年来汽车向“电动化、智能化、网联化”的加速演进,已让汽车本质上由单纯的机械式机器变成了一个越来越复杂的电子系统,而这个电子系统的故障又极可能导致事故、人员伤害或死亡,风险控制即功能安全已成为新车研发所必须关注的问题。文中从功能安全研究背景、标准现状、开发流程以及功能安全认证角度进行了分析梳理,以期对企业研发或相关技术人员有所助益。     

符合AUTOSAR架构的车辆电控系统软件配置库部署和集成方法

致力于提高日趋复杂的车辆电控系统软件在不同硬件平台的复用能力的AUTOSAR架构应用越来越广泛。符合AUTOSAR架构的软件设计和实现过程必然要与软件配置管理结合。在IBM Rational Clear Case环境下,对基于AUTOSAR架构的车辆电控系统软件配置管理四库部署和集成方法进行讨论。应用效果证明该方法能顺畅地与项目组织结构相结合,有效地增强专业积累能力、项目变更控制有效性和开发效率。     

V-模式及其在现代汽车电子系统开发中的应用

分析了V-模式和传统模式在汽车电子系统开发中的流程，并比较了两者的开发特点。在此基础上，以燃料电池车用动力锂离子电池管理系统的开发为实例给出了如何基于V-模式开发现代汽车电子系统。结果表明，V-模式在这样的电子系统设计中是行之有效的。     

基于AUTOSAR标准的以太网诊断通信实现

在AUTOSAR标准下实现了基于以太网的诊断,并简要分析了基于以太网诊断通信的优势。将开源的TCP/IP协议栈LwIP移植进AUTOSAR的基础软件层,在此基础上,构建基于以太网的通信协议栈,从下到上依次为以太网驱动、以太网接口、TCP/IP协议栈、套接字适配器。在以太网通信协议栈的基础之上加入与诊断通信相关的模块,分别是基于IP协议的诊断、PDU Router和诊断通信管理,实现基于AUTOSAR标准的以太网诊断通信。并设计相应的诊断上位机测试UDS诊断服务,说明基于以太网诊断通信在大数据量传输过程中具有基于CAN诊断通信无可比拟的优越性。     

直驱混联式混合动力客车控制策略的开发与验证

混合动力汽车的推广是汽车工业在未来面临能源短缺和应对温室气体排放使全球气温升高的有效途径,本文针对某直驱混联式混合动力城市客车,开发了其整车能量管理策略,基于MATLAB/Simulink软件平台和AUTOSAR架构,搭建了整车控制软件模型,通过实车道路试验,验证了所开发的整车控制策略的有效性。     

基于PREEvision的AUTOSAR软件建模

提出了基于PREEvision的AUTOSAR软件开发流程,采用ARXML文件进行信息交互,实现了PREEvision与MATLAB/Simulink软件的无缝对接。通过对ARXML的解析以及对AUTOSAR开发方法的研究,实现了PREEvision软件自动导出生成Simulink模型,同样Simulink模型亦可自动导入PREEvision软件,形成基于PREEvision自上而下的AUTOSAR软件开发流程。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.