基于LabVIEW的旋臂水池远程测控系统开发

旋臂水池试验台是一套用于测量船舶水动力系数的试验设备,传统的试验台不能进行买时监控,而且对旋臂转动和船模姿态没有进行综合控制,需要多人通过对讲机进行控制,效率低而且容易出现误操作.为改善试验性能,基于NI公司的相关硬件和LabvIEW软件开发平台,设计了一套基于虚拟仪器技术的远程测控系统,该系统包括了数据采集子系统和综合控制管理子系统.初步试验表明该系统使用方便,提高了效率.     

飞机机轮联合载荷试验台的PLC控制系统

飞机机轮径侧向联合载荷试验系统是检验飞机机轮静态性能的重要试验设备，介绍了飞机机轮径侧向联合载荷试验台及基于可编程控制器（PLC）集成的控制系统的研制。试验台的电气控制系统以PLC和触摸屏工控机为核心构成，能够自动完成对机轮的径向单独加压、径侧向联合加压试验。     

微机监控电动机综合试验

试验台采用ＭＣＳ５１单片机为核心，配备必要的接口及控制电路，实现自动数据采集。数据处理，以得到比较全面的信息，供现场技术人员来评价电动机的质量。试验台采用键盘输入数据，配有微型打印机输出试验结果。系统软件用ＭＢＡＳＩＣ语言和ＭＣＳ５１汇编语言编写。并考虑了一些容错功能，比较适合在煤矿修理车间做为电动机修理后的试验设备。     

电液伺服控制系统测试试验台的研究与设计

根据电液伺服控制系统测试试验的要求,结合武器系统自身的特点和功能需求,应用现代控制理论、计算机辅助测试技术、模块化设计等理论与技术,设计出了一套电液伺服控制系统测试试验台,给出了该试验台的总体设计方案,介绍了液压伺服系统原理与测控系统的软、硬件构成,并探讨了试验台的扩展性及后续开发功能.     

浅析虚拟现实技术在座椅设计人机工效分析中的应用

针对当前座椅设计时进行人机分析时存在的周期长、投入大的不足,将虚拟现实技术应用到座椅设计当中。井以JACK软件为例。对虚拟现实技术在座椅设计人机工效分析中的应用进行实例验证。结果表明：虚拟现实技术能够有效地加快座椅设计的开发进程,提高了人机分析的效率,满足了座椅设计人机研究的需求,具有较高的先进性与实用性。     

座椅骨架静强度分析方法

汽车座椅骨架的结构静强度是影响座椅安全和舒适性的重要因素,必须进行静强度试验,但是物理试验存在复杂和不确定性,一旦出现试验失效,重复试验会增加大笔额外开支和研发周期.在分析座椅骨架载荷基础上,根据国家法规要求,通过有限元技术进行了座椅骨架静强度仿真.用Hypermesh对物理模型进行前处理,Abaqus软件进行有限元分析计算,Hperview进行计算结果的后处理,并按国家法规对座椅静强度要求对设计模型进行子检验.基于多种有限元软件,可以在座椅骨架设计阶段就能快速有效地对设计结构进行验证,以检验其合理性.     

嵌入式智能家居座椅运动控制系统设计

为满足智能家居座椅的交互式运动控制需求,基于AT89S52设计了嵌入式座椅运动控制系统.使用VB.net设计了游戏手柄按键读取软件,并在此基础上设计了座椅运动控制软件,软件可分别在"手柄模式"和"鼠标模式"下与嵌入式座椅运动控制器通信,进而控制座椅进行加速、减速、正转和反转等运动;构建了控制系统实验装置,实验结果表明,"鼠标模式"下,通过鼠标点击控制软件上功能按钮可实现对座椅的准确运动控制;"手柄模式"下,游戏手柄不仅可控制座椅运动,还可同步控制电脑上运行的游戏或远程遥控车,实现浸入感较强的座椅运动娱乐应用.     

减摇水舱试验台架系统PID控制算法的研究与实现

船舶减摇水舱试验台架是研究和设计减摇水舱的重要试验设备，准确模拟船舶在海浪中的运动是设计试验台架的关键。本系统用电液力矩伺服控制系统来模拟海浪力矩，采用PID算法进行控制，其仿真结果符合要求。     

基于条形码技术的试验设备协同管理方法

基于飞机结构强度试验中试验设备的使用流程,结合条形码技术,设计了一种客户端和数据采集器协同管理试验设备的方法。客户端通过与数据服务器的协同,实现试验和设备基本信息的管理以及试验设备选取表单的生成;数据采集器通过扫描条形码识别试验设备,实现便捷选取、修改、撤离、调试、报修、盘点和基本信息查询等功能。客户端与数据采集器之间通过数据线连接实现数据离线同步,建立试验设备的完整使用流程。通过在液压作动筒设备管理过程中的应用表明,该方法避免了手工操作设备编号而引入的错误,提高了工作效率。     

直升机座椅舒适性研究的仿真分析

针对当前直升机座椅舒适性的研究,还缺少生物力学仿真分析的问题.首先采用AnyBody模型系统构建了“座椅-人-操纵装置”人机交互模型,然后利用逆向动力学对人体五个主要受力部位的最大平均肌肉活动水平和腰椎L4-L5之间的压力进行了仿真分析,结果表明,座椅靠背倾角、座椅前后调整距离、座垫摩擦系数和腰靠等相关座椅参数对人体舒适性具有不同程度的影响.最后,建立了人体舒适性与相关肌肉活动水平的函数关系,为直升机座椅的舒适性研究提供了一种量化方法.     

CAE技术在汽车座椅骨架开发中的应用

为提高汽车座椅骨架的开发质量,在某型汽车座椅骨架开发中应用CAE技术进行骨架静强度和疲劳等模拟.采用壳单元与梁单元相结合建立座椅骨架有限元模型;根据座椅骨架台架耐久试验要求和试验条件,对座椅安装孔进行全约束处理,并在试验加载位置施加相应的载荷;采用Abaqus/Standard分析座椅骨架强度;在静强度分析基础上应用F...     

基于RFID的汽车零件运输跟踪系统设计

给出了一种基于RFID/GPRS的汽车零件运输跟踪系统的设计和实现。系统由总控中心、车载终端、客户终端、GPRS无线网及互联网等四部分组成。车载终端向总控中心发送的汽车零件RFID编码及所在的地理位置信息由总控中心处理。用户可用手机、电脑等客户终端设备,通过互联网与总控中心的服务器连接,输入RFID编号,即可查询到零件所在地理位置。由于系统使用了RFID和GPRS无线通信技术,具有较强的实时性,能够实现汽车零件在运输过程中的在线全程跟踪。     

基于MRP汽车零部件生产计划系统研究与实现

为了提高汽车零部件生产效率，确保按时完成客户订单，将物料需求计划（MRP）技术应用于汽车零部件生产计划系统中．首先给出了汽车零部件行业的供应链结构，提出了基于MRP的对产品进行分组并对产品结构进行层次化分解的汽车零部件生产计划模式．在此基础上，详细介绍了利用客户订单、产品结构信息、工作日历以及库存信息等来生成零部件生产计划和所需物料的采购计划的实现过程，并对实例进行了分析．该系统已经应用于汽车零部件生产企业中．     

汽车安全气囊点火系统设计与实现

随着对安全的考虑和要求越来越高,以及相关立法的实施,促进了更加复杂的汽车安全气囊系统的开发。由此,仅用于前向碰撞保护的基本安全气囊系统正逐渐被一种更加智能的高端气囊系统所取代。这种系统增加了对前后排乘客的侧面碰撞保护并追加了对头部和膝部保护的辅助系统。与此同时,气囊控制系统中点火回路的数量及控制复杂度也相应增加。该文对安全气囊点火系统进行了相应的研究和设计。     

Thermal comfort of aeroplane seats: influence of different seat materials and the use of laboratory test methods

This study determined the influence of different cover and cushion materials on the thermal comfort of aeroplane seats. Different materials as well as ready made seats were investigated by the physiological laboratory test methods Skin Model and seat comfort tester. Additionally, seat trials with human test subjects were performed in a climatic chamber. Results show that a fabric cover produces a considerably higher sweat transport than leather. A three-dimensional knitted spacer fabric turns out to be the better cushion alternative in comparison to a moulded foam pad. Results from the physiological laboratory test methods nicely correspond to the seat trials with human test subjects.     

地铁或公交专座的智能管理

针对当前某些人交通出行不文明现象的存在,为了通过技术手段来促使社会风气的改善,提出一种地铁或公交专座的智能管理系统。该系统的智能识别算法包括：系统训练与在线识别两大部分。前者,对训练样本进行学习,当系统处于学习状态时,系统对青壮年样本男性脸部图像采集与处理;后者,即系统进入在线识别状态,对＂老弱病残孕＂专座上的乘客实施实时监视,根据识别结果对＂老弱病残孕＂专座乘客确定控制指令输出,决定是否由语音提示器向该乘客警示,使得不该占位＂老弱病残孕＂专座者有所警觉自己的行为失误。因此,能够使公交专座的设置发挥其应有的作用和社会风气的改善。该系统识别准确率达到98%以上。     

Dynamic modeling and control of a multi-robot system for assembly of flexible payloads with applications to automotive body assembly

The field of multi-robot control has almost exclusively addressed issues that are of relevance to the manipulation of payloads that are rigid. A number of studies have examined the multi-robot manipulation of rigid payloads with one or more lower-pair joints such as hand tools, i.e., pliers. In this work, we examine certain modeling and control aspects associated with the assembly of flexible payloads with a multi-robot system. While this particular problem is of a general nature, our work is motivated by the particular problem presented by the assembly of automotive bodies from sheet metal parts. State of the art assembly of automotive bodies involves the use of a great number of costly hardware fixtures that are used to orient and clamp each piece of bent sheet metal prior to robot welding. Currently under development, a new assembly technology called flexible fixtureless assembly is being designed to replace fixtures with robotic technology. Each robot grasps one piece of sheet metal, and correctly positions and orients the part to mate them to permit a third robot to weld them. The assembly process is complicated by the fact that the sheet metal parts are flexible, cannot be permanently deformed during mating and must be positioned to within a relatively small position tolerance. This article describes work performed to model the dynamics of a multi-robot system consisting of two robot manipulators bringing sheet metal parts of an automotive body into contact. This dynamic model is used as a tool to facilitate the investigation of control strategies for the execution of this task. To adequately model the system, the sheet metal parts are first discretized into finite shell elements. The flexible payload dynamics are derived via the Lagrangian formulation and combined with the robot dynamics to form one robot-payload system. The system equations are first simplified by making use of some of the properties of the assembly process. This allows certain of the interaction effects between flexible and rigid body coordinates to be ignored. Contact between the sheet metal payloads during the mating process is modeled with an exponential barrier function. Application of Guyan reduction leads to a lower order dynamic model of the sheet metal payloads and a simplified dynamic model of the two robot system suitable for numerical simulation. The model developed is then used to investigate several candidate control methods for the mating of two sheet metal parts. Simulation results are presented for proportional and derivative control with gravity compensation, computed torque control, and master slave hybrid position force control. Simulation results reveal that all three control methods are able to achieve contact force and position stability. Adequate performance of the proportional and derivative control demonstrates that standard industrial controls implemented in commercial robots may be used to control robots for fixtureless assembly tasks. © 1996 John Wiley & Sons, Inc.     

Malaysian sitting anthropometry for seat fit parameters

This article presents sitting anthropometry data for Malaysians focusing on seat fit parameters. It offers additional data regarding seat design requirements as there have been only a few efforts made to establish anthropometry data in Malaysia. An analysis using a measurement composed of 16 common and important dimensions in seat design was done with 216 subjects. Data collection was done by using direct measuring methods with standard equipment. Malaysian automobile seat fit parameters, namely backrest width, backrest height, cushion width, and cushion length were established from collected anthropometric dimensions: interscye breadth (5th percentile female and 95th percentile male), sitting shoulder height (5th percentile female), hip breadth (95th percentile female), and buttock–popliteal length (5th percentile female), respectively. From the data collected, this study finds that the fit parameter dimensions are bigger than other Asians' 95th percentile values but smaller than the Filipino and the Thai data being compared in this study. The female 5th percentile values for cushion length and cushion width are the smallest. In addition, two local automobile seats were measured and compared with the data. It was observed that the cushion lengths of both seats were too long for the 5th percentile female of the current data. This study provides seat fit parameters–the most fundamental part of automotive seat design, especially for the Malaysian population. © 2010 Wiley Periodicals, Inc.