真空泵控制器EMC试验测试布置设计

本文主要介绍一种真空泵控制器EMC试验装置,试验布置设计中利用单向阀和电子模拟器,有效解决测试过程中真空泵控制器不能持续工作的问题;消除真空泵对发射类测试环境产生电磁干扰的影响;增加抗扰测试实时监控有效参数的功能。该设计满足辐射发射和辐射抗扰等电磁兼容测试项目对被测件运行状态的测试要求。     

Fidelity of using scaled vehicles for chassis dynamic studies

There are many situations where physical testing of a vehicle or vehicle controller is necessary, yet use of a full-size vehicle is not practical. Some situations include implementation testing of novel actuation strategies, analysing the behaviour of chassis feedback control under system faults, or near-unstable situations such as limit handling under driver-assist feedback control. Historically, many have advocated the use of scale vehicles as surrogates for larger vehicles. This article presents analysis and experimental testing that examines the fidelity of using scaled vehicles for vehicle chassis dynamics and control studies. In support of this effort, this work introduces an experimental system called the Pennsylvania State University Rolling Roadway Simulator (the PURRS). In the PURRS, a custom-built scale-sized vehicle is freely driven on a moving roadway surface. While others have used scale-vehicle rolling roadway simulators in the past, this work is the first to attempt to directly match the planar dynamic performance of the scale-sized vehicle to a specific full-sized vehicle by careful design of the scale vehicle. This article explains details of this effort including vehicle dynamic modelling, detailed measurement of model parameters, conditions for dynamic similitude, validation of the resulting experimental vehicle in the time, frequency, and dimensionless domains. The results of the dynamic comparisons between scale- and full-sized vehicles clearly illustrate operational regimes where agreement is quite good, and other regimes where agreement is quite poor. Both are useful to understand the applicability of scale-vehicle results to full-size vehicle analysis.     

An Optimization Method for Simulator Using Probability Statistic Model

IntroductionSimulator is an indispensable tool in earlyphase of embedded system design.It providesstatistic for system functional verification.Fur-thermore,the development of system-on-chip(SOC)makes embedded system customized forspecific application possible.In order to make sys-tem meet constraints of performance,power con-sumption and chip area without wasting more costand time,simulator is often used to evaluate andmodify candidate architectures.Simulation techniques are divided into two…     

基于HLA的分布式三维视景列车运行模拟器的设计与实现

介绍一种基于HLA的三维视景列车运行模拟器.该模拟器可以接入CTCS3列控系统仿真测试平台,以三维视景输出方式,模拟列车运行.同时,模拟器之间可以通过RTI互相连接,仿真多辆列车运行.对该模拟嚣的软件框架设计和各个功能模块实现进行简要介绍.     

大型船舶操纵模拟器的系统组成及分析

以最近从大连海事大学引进的DMU大型船舶操纵模拟器为例，全面系统地介绍大型船舶操纵模拟器的系统组成，并对系统的工作过程、数学模型、视景系统进行分析，以期对航海模拟器的研制、开发和使用提供借鉴。     

驾驶员进行轮机模拟器培训的可行性分析

通过对我国船员知识结构和航运市场对船员的素质要求进行分析,认为驾驶员进行轮机模拟器培训,对提高自动化和轮机管理水平是非常有必要的,也是可行的。     

驾驶模拟器现状及应用研究

通过对驾驶模拟器的种类和典型的结构组成进行回顾分析,并对驾驶模拟器在研究道路交通、驾驶行为、道路环境设计、汽车工程等方面的不可替代的优势进行深入的阐述,将对驾驶模拟器的推广应用产生重要的影响。     

雾天对弯道驾驶行为的影响研究

雾天环境下不良的视距条件使得驾驶员在驾驶过程中存在安全隐患.利用驾驶模拟器,选取雾天环境作为典型干预因素进行驾驶模拟实验,同时考虑驾驶人职业和性别作为可能的影响因素,实验设计直角弯道和S形连续弯道2种道路线形,从实验数据中抽取平均车速与车辆驶出弯道率作为关键变量,采用多变量方差分析、均值统计等方法分析雾天环境下驾驶人的驾驶速度和驶出弯道率,并建立Logistic回归模型分析各因素对车辆驶出弯道可能性的影响.实验结果表明,驾驶人在弯道雾天行驶时的平均车速要比无雾情况下略高,且职业驾驶人的平均车速较非职业驾驶人明显偏低;随着雾的浓度的增大,驾驶人在直角弯道处和S形连续弯道处驶出弯道的比例均显著增大.     

基于驾驶模拟器的驾驶人制动后制动踏板操作行为分析

制动过程主要由制动前的反应过程以及制动后的减速过程组成.研究制动后避撞行为对于理解驾驶人的避撞行为、建立制动曲线模型等有着重要作用.利用配有8自由度运动系统的高仿真驾驶模拟器,研究了驾驶人在不同前车减速度(0.3,0.5,0.75g)和不同车头时距(1.5,2.5 s)的制动后制动踏板操作行为.利用ANOVA模型分别比较了驾驶人制动后制动踏板操作行为参数的.差异.结果表明,踩踏板速率随着制动时车头时距的减少而增加,并且随着前车减速度的减少而减少;新手驾驶人的踩踏板速率普遍大于经验驾驶人;相比于前车速度的改变,驾驶人对制动时车头时距的变化更加敏感.     

船舶驾驶模拟器操纵及监控报警系统仿真

针对船用柴油机的运行起动操作训练,介绍了基于 LabVIEW 与 PLC 实现的船舶主机遥控起动的系统结构及其功能特点。在模拟器上通过 LabVIEW 与 PLC 之间的数据通信,实现船舶柴油机的起动操纵多种逻辑控制的模拟,建立了船舶柴油机虚拟起动仿真平台,并利用 LabVIEW SQL Toolkit 的数据通信,使用内置数据采集卡的计算机和 LabVIEW 编程语言建立了一套基于 SQL 数据库的船舶监控报警系统。该系统可给出船舶柴油机在起动操纵时参数的物力变化仪表显示量,以及操纵过程中视景变化的效果。