基于LabVIEW的汽车电动助力转向系统测试平台的研究

本文利用高性能的数据采集设备结合个人计算机,建立系统硬件平台;采用LabVIEW软件开发平台,再结合相应的驱动程序,开发出集数据采集、测试、存储、分析和显示功能于一体的汽车电动助力转向虚拟测试平台。该平台的测试结果表明：本虚拟测试系统操作简便、快速,运行可靠,测试精度高,测试成本低,可维护性高,可扩充性好。     

虚拟仪器技术在汽车性能测试中的应用

提出了一种基于虚拟仪器测试汽车性能的新方法,建立了基于虚拟仪器的汽车性能测试系统,该测试系统采用PC DAQ方案,通过多传感器采集和数据融合,配以PC机平台和虚拟仪器软件,构成了汽车各种性能的数据采集控制仪器和系统,从而将多种数字化的汽车性能测试仪器虚拟化为以PC机为核心和硬件支持的数字化、柔性化、智能化的汽车性能虚拟集成测试系统。该测试系统可以对汽车的排放性能、噪声、前大灯、制动性能、悬架特性、底盘测功、转向操纵以及侧滑等性能进行测试。实车测试证明:所开发的汽车性能测试系统的测试准确、可靠。     

基于虚拟技术的汽车组合仪表测试系统设计

针对汽车组合仪表测试问题,以NI公司LabVIEW软件为基础,硬件采用NI公司的USB-6008数据采集卡,进行基于虚拟技术的汽车组合仪表测试系统的设计。结果表明该测试系统具有设计周期短、成本较低、便携性、易扩展性和操作直观的优点。     

基于Lab VIEW的DC/DC变换器测试系统的设计与开发

DC/DC变换器作为电动汽车高低压电气系统重要的组成部件,其性能测试非常重要。文章结合DC/DC变换器的电气参数测试要求和数据采集技术,开发了基于Lab VIEW平台的DC/DC变换器的测试系统。该检测系统使用简便,可实现DC/DC变换器各项参数的数据采集和实时展示,可用于DC/DC变换器的实验性验证和综合评定,利于设计优化。     

增程式电动汽车虚拟测试系统开发及应用

为开展增程式电动汽车能量管理策略优化和排放研究,搭建了增程器半实物平台,在所搭建的半实物平台的基础上集成了测试设备,组成了完善的虚拟测试系统。针对某12 m长增程式电动客车,在所搭建的虚拟测试系统上进行循环测试,测试结果与仿真结果对比表明,虚拟测试系统测试得到的油耗、车速、辅助动力系统(APU)输出功率、SOC等与计算机仿真结果一致,验证了该虚拟测试系统的准确性和可靠性。     

超级电容与燃料电池发动机混合动力系统测试研究

构建了包括混合动力系统、负载系统、数据采集系统及控制系统的超级电容与燃料电池混合动力系统测试平台,并对该系统进行了测试试验.测试结果表明,道路仿真软件RLS能有效模拟实际道路工况;超级电容可弥补燃料电池发动机的缺陷;CAN总线技术采集设备的使用提高了数据采集系统的可靠性.该混合动力系统测试平台为燃料电池汽车的开发提供了试验手段.     

基于LabVIEW的汽车动力性测试分析系统的研究

针对当前汽车动力性的测试方法单一且可分析性差的问题,基于虚拟仪器技术建立了汽车动力性测试系统。系统以图形化编程语言LabVIEW为软件开发平台,配以笔记本电脑、传感器、信号调理卡和数据采集卡组成。该系统可以完成对汽车动力性的数据采集、处理、分析和显示功能。     

基于CORBA分布式统一网管的性能管理系统设计

本文基于的统一网管平台,根据联通规范的要求,基于CORBA技术,按照统一网管平台架构的思想,结合作者对性能管理中数据采集系统所作的研究,设计了性能管理系统,包括如何创建任务、删除任务、数据采集等。     

基于Labview的纯电动汽车电力驱动测试系统平台研究(软件部分)

经过对市面上不同电力驱动试验平台模型进行对比,设计出符合用户需求的纯电动汽车电力驱动测试系统平台模型。根据设计的测试系统模型自行设计硬件电路、通信模块,以Labview2012编程软件为平台,实现上位机控制编程。上位机界面主要包括用户登录、参数设计、数据采集及存储、信号处理与报表打印,起到工况模拟及实时监控作用。     

汽车液压制动器虚拟综合测试系统

按照国家有关汽车制动安全性能强制性法规的要求，开发了一套采用笔记本电脑和高性能数据采集器构成的汽车制动系虚拟测试系统，可随车测试汽车制动时各个制动液压缸的压力、车轮转速、车体减速度、制动蹄片温度、脚踏力等20个参数的变化情况。     

汽车仪表板与转向系振动特性CAE分析

基于给定的某款车型数据,利用MSC．ADAMS／Car平台建立包括仪表板和转向系在内刚柔耦合整车模型,对转向系和仪表板进行典型工况下NVH特性分析;并利用有限元方法对仪表板、转向系总成建模并求解模态参数,有效预测可能出现的NVH问题,为提升整车NVH性能提供了必要的参考。     

汽车液压动力转向器测试系统

一种汽车液压动力转向器性能测试试验台,应用先进的计算机测控原理与信息技术,并采用微机控制液压系 统和伺服电机系统来模拟转向器在现场的工作状况,实现了驱动与加载方式的自动化。该系统性能稳定、操作简单、 测量速度快、测试精度高。     

基于dSPACE和AVL的纯电动汽车电驱动系统效率测试

针对纯电动汽车电驱动系统搭建基于dSPACE和AVL的测试平台,模拟整车模式采用CAN通讯方式传输数据。详细论述系统软硬件架构、平台搭建、效率测试等,并分析电驱动系统高效区和特定工况下的效率。     

Analysis process of a steering system using a concept model for idle vibration

This paper describes the development of an optimal design process for a steering column system and supporting system. A design guide is proposed at the initial concept stage of the development process to obtain sufficient stiffness of the steering system while reducing the idle vibration sensitivity of the system. Case studies on resonance isolation are summarized, where vibration modes among the systems are separated by applying a vibration mode map at the initial stage of the design process. This study also provides design guidelines for an optimal dynamic damper system using a CAE (computer aided engineering) analysis. The damper FE (finite element) model is added to the vehicle model to analyze the relation between the frequency and the sensitivity of the steering column system. This analysis methodology makes it possible to achieve target performance in the early design stage and reduction of damper tuning activity after the proto car test stage. Through the proposed steering column system development process, a lightweight vehicle with high stiffness is possible prior to the proto build stage. Furthermore, the improved process is expected to contribute to reducing the overall development period and the number of proto car tests necessary to achieve the desired steering system performance.     

Integrated chassis control for a three-axle electric bus with distributed driving motors and active rear steering system

This paper describes an integrated chassis control framework for a novel three-axle electric bus with active rear steering (ARS) axle and four motors at the middle and rear wheels. The proposed integrated framework consists of four parts: (1) an active speed limiting controller is designed for anti-body slip control and rollover prevention; (2) an ARS controller is designed for coordinating the tyre wear between the driving wheels; (3) an inter-axle torque distribution controller is designed for optimal torque distribution between the axles, considering anti-wheel slip and battery power limitations and (4) a data acquisition and estimation module for collecting the measured and estimated vehicle states. To verify the performances, a simulation platform is established in Trucksim software combined with Simulink. Three test cases are particularly designed to show the performances. The proposed algorithm is compared with a simple even control algorithm. The test results show satisfactory lateral stability and rollover prevention performances under severe steering conditions. The desired tyre wear coordinating performance is also realised, and the wheel slip ratios are restricted within stable region during intensive driving and emergency braking with complicated road conditions.     

Automotive steering system preferences evaluated using a driving simulator

The automotive steering system is the primary channel through which road and vehicle behavior feedback is transmitted to the driver. While the driver provides directional platform control through the steering wheel, perceptions of the vehicle’s handling responsiveness are simultaneously transmitted back to the driver allowing for correction of any instabilities the vehicle may encounter. Based on these factors, drivers often pay special attention to the steering system when deciding what vehicle to purchase. Therefore, a significant amount of effort and time is invested in attempting to determine the optimal design of steering system components and configurations. In this study, the determination of an optimal steering configuration was attempted based on responses obtained from questionnaires that subjects answered. The questions were designed to evaluate the degree of satisfaction regarding the “control”, “ease of operation”, and “fun” participants experienced after each driving run. During the study, human subjects drove a driving simulator for 15 combinations of 3 different roadway environments and 5 different steering configurations, filling out a questionnaire after each scenario. The subjects were also classified as a type of driver (“utility”, “enthusiast”, and/or “performance”). The study attempted to determine if the mean values of questionnaire responses for “control”, “ease”, and “fun” type of questions changed as the scenario and/or driver type changed. Analysis of Variance (ANOVA) was used to determine if the mean values of the three types of questions were statistically different. The overall results suggest that the average responses for vehicle “control”, “ease”, and the “fun” type of questions were dependent on the type of roadway environment; however, only the responses for “fun” type of questions were influenced by the given steering configurations. Indeed, the steering system can impact the driver’s perceptions of the vehicle’s operational experience.     

Study on the performance of active front steering system

The performance of a steering system equipped with active front steering (AFS) device is investigated with the consideration of AFS intervention and a proposed dynamic model. Firstly, the kinematics and dynamics of AFS are illustrated based on the mechanism of AFS with planetary gear set and a detailed dynamic model. Furthermore, a basic control on the voltage of DC motor at AFS actuator is proposed. It is realized by a proportional controller that the input is the difference of desired steering ratio and a conventional gear ratio. Finally, two numerical simulations are carried out. One is on-center handling test to demonstrate the basic characteristics of AFS. The other simulation is to demonstrate the effects of vehicle speed, frequency of steering input and AFS intervention on steering system performance. It is shown that the proposed AFS dynamic model is capable to simulate dynamic performance of AFS. The effect of AFS intervention on turning efforts at hand steering wheel is inevitable and the turning comfort is deteriorated to some extent.     

基于MC9S12XS128的电动助力转向系统的设计

阐述了电动助力转向系统（EPs）的基本组成和工作原理,设计了基于MC9S12XS128单片机控制的电动助力转向系统。介绍了其主要硬件电路模块的组成和软件总体设计,并对所设计的EPS控制器进行了台架试验,试验表明所设计的电助力转向系统能够很好地跟踪月标电流,实现闭环助力功能。     

基于PLC刀盘刀具破岩模态实验平台控制系统设计

在盾构破岩掘进过程中,盘形滚刀是最有效的机械破岩方式之一,而影响盘形滚刀破岩速率和破岩效率的主要因素是盘形滚刀刀间距的合理设置,刀间距的优化设计是基于盘形滚刀对不同岩样破岩角的确定。基于PLC设计的控制系统数据采集、处理实验平台的模拟控制参数,通过采用声发射信号源定位检测的方法来近似计算破岩角。在贯入度确定的条件下针对同一岩样,如果刀间距太大,一把盘形滚刀产生的岩石裂纹不能与相邻盘形滚刀的影响范围相接,必定开挖不出片状石渣,从而使破岩速率降低;反之如果刀间距太小,则会使石渣块太小,从而降低破岩效率。详细阐述实验平台控制系统设计原理,并对其数据采集、处理策略进行分析,所设计的控制系统满足实验平台控制要求。