Research on Cooperative Design Network Security Based on IP-VPN

As the important method and instrument of agile manufacture,the technology of distributed collaborative design and manufacturing has become the hotspot of manufacturing. The basic concept and key technologies of IP_VPN are introduced in this paper,and a collaborative design network model based on IP_VPN is presented. Distributed collaborative design is a multi_user,multitask involved system, which is consisted of lots of collaborative processs,so the network security is the key of distributed collaborative design. We research on the security of collaborative design network based on IP_VPN, hence get a conclusion:we can construct an economical?practical and secure collaborative design network system by the application of data encryption,user authentication and access control based on the role,etc.     

行星摆线针轮减速机构的动力学虚拟仿真

以UG、ADAMS等三维造型及运动学、动力学分析软件为平台，利用虚拟设计技术建立了行星摆线针轮减速机构的动力学虚拟样机模型。探讨了行星摆线针轮减速机物理约束机制的实现方法，建立了虚拟样机系统的力学模型，验证了样机的动态干涉情况，并对摆线针轮减速机构进行了动力学仿真分析，最后还进行了柱销与输出轴作用力的虚拟实验分析。仿真分析结果表明，提出的摆线针轮减速机虚拟样机建模正确，有较好的可靠性和实用价值。     

汽车仪表总成终检台系统开发

针对“汽车仪表总成终检台”系统的开发,,论述了系统设计的背景、设计原理和设计思想:该系统应用于汽车仪表总成出厂前的各项性能测试,并把实测的各项指标存放于数据库中,使得产品的可追溯性得以实现,它对国产汽车仪表总成的各项性能检测趋于科学化、规范化、批量化,使其能达到国际汽车工业的同等水平。     

基于C++ Builder的汽油发动机数据采集系统

基于C Builder软件平台，利用虚拟仪器先进技术，采用动态多文档模式，开发了汽油发动机数据采集系统，包括点火信号，喷油信号，转速信号，节气门位置信号，基极驱动信号和步进电机信号等采集子模块，实验证明其工作性能稳定，测试精度较高，界面友好，用户操作方便，体现了虚拟仪器的优点。     

基于桌面虚拟现实系统车辆运动仿真的立体视觉实现

设计了一套桌面虚拟现实系统，在该系统下实现了立体视觉，并给出了车辆运动仿真的一个实例。虚拟现实技术为车辆运动仿真提供了一种新的方法。     

调速器主配中位自动诊断及智能纠偏技术研究与应用

液压随动系统主配电气中位未整定准确和温漂作用是调速器系统出现主配频繁调节的主要原因之一。技术人员对调速器液压随动系统进行深入的理论研究,提出了静态平衡理论和主配中位纠偏原理,探索出了主配电气中位自适应方法,进而通过调速器电气控制系统自适应控制功能软件开发,实现了主配电气中位自动诊断及智能纠偏功能,并通过真机测试验证其功能效果,完美解决了液压随动系统主配电气中位未整定准确或由于温漂作用导致的调速器系统主配频繁调节问题,保证了机组和电网安全稳定运行。     

远程拖拉机检测与分析系统的实现

利用虚拟仪器技术、网络技术和数据库技术, 开发了基于B/S模式的远程拖拉机检测和分析系统。远程客户只需使用标准的Internet浏览器,就可以观看或实时控制各个测试点的拖拉机性能检测,如制动力、速度、噪音等。该系统解决了拖拉机检测中大量数据的远程存储和访问等关键技术问题,为远程拖拉机检测提供了一种新的方法。     

用于内燃机数据采集与处理的虚拟仪器技术开发

基于虚拟仪器技术,以数据采集卡及计算机为主要硬件平台,利用图形化编程语言LabVIEW编程,设计出内燃机数据采集与处理系统。研究结果表明该系统运行可靠,人机界面友好,操作使用方便,且便于用户扩展功能,实现了较高的性价比。该系统的开发成功对于加快内燃机试验进程以及深入开展科学研究具有重要意义。     

柴油机三大精密偶件密封性对供油特性的影响

柴油机喷油泵的柱塞、出油阀和针阀这三大精密偶件的磨损程度直接影响到柴油机的供油规律和各种综合性能。为此,采用二次回归正交设计的方法,通过大量的试验数据,建立了精密偶件的磨损量与供油量之间的定量关系式,从而更直观、清楚地了解到三大精密偶件的密封性对供油量影响程度的主次关系。     

Suitability of Multi-Agent Simulations to study irrigated system viability: application to case studies in the Senegal River Valley

It is assumed that Agent-Based Modeling is a useful technique for water management issues. In particular, it may provide a suitable framework for representing irrigated systems. The objective of this paper is to demonstrate its potential for a specific use: research on irrigated systems’ viability in the Senegal River Valley. The main assumption to be verified is that Multi-Agent Systems constitute a suitable architecture to study theoretically irrigated systems’ viability using simulations. By using Multi-Agent Systems, virtual irrigated systems can be designed that might then be used as virtual laboratories. These virtual labs constitute an alternative when real labs cannot exist for some reason.

In this paper we report on experiments we have conducted using such virtual labs for exploring an Agent-Based Model through the simulation of scenarios. A scenario is defined as a triplet: an environment, a set of individual rules, a set of collective rules. It is evaluated according to the longevity of the irrigated system. An index is defined, based on the ratio of long-enduring simulations among a set of repetitions of a given scenario. Even if simulation results display significant diversity for a given scenario due to random factors in the processes simulated, the ratio of long-enduring simulations is repeatable. This entails to explore the overall behavior of the virtual irrigated system and to build theories concerning the viability of Senegalese irrigated systems. An example is given showing the need for strong coherence for a given environment among individual rules and collective rules.