共查询到20条相似文献,搜索用时 109 毫秒
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为了提高电梯群的运行效率和服务质量,需要采用电梯群控系统来协调各电梯的运行,电梯群控系统的核心问题是电梯群控算法及其性能的测试.采用分布式设计思想,设计了一种基于LonWorks的电梯群控系统仿真平台,可以将不同的电梯群控算法程序下载到该仿真平台上测试,能比较出群控算法的性能和效率.结果表明,所设计的仿真平台能够测试电梯群控算法的优劣,是一种经济、实用、有效的实验平台. 相似文献
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飞机座舱温度场数值仿真研究 总被引:4,自引:1,他引:3
要为飞机座舱空气分配系统以及飞机的环控系统提供更为可靠的设计依据.应寻求更加接近实际的座舱温度场的分布情况.根据飞机座舱内实际存在的传热过程,主要在导热-对流传热的基础上考虑了辐射传热,在利用计算流体动力学(CFD)软件Fluent对飞机座舱温度场的数值仿真过程中,加入了离散坐标辐射模型,主要壁面采用了对流-辐射混合热边界条件,而且考虑了太阳辐射对舱内温度场的影响.针对某战斗机的设计状态点对其座舱温度场进行仿真,得到了该条件下的舱内温度分布和辐射换热量,计算结果跟传统方法进行了比较,表明了实际性和可行性. 相似文献
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模拟座舱及其虚拟仪表作为飞控半物理仿真系统中用户和系统交互的设备,具有重要的作用;利用Visual C++/GL Studio联合开发了虚拟仪表显示界面,并采用Socket通讯接收来自飞行仿真计算机的仿真数据,驱动程序根据相应的数据驱动仪表界面进行演示,向用户反馈飞行器的飞行状态;同时,通过模拟座舱的控制输入设备,将模拟操纵信号输出给实时网络,实现对飞行器操纵的目的;试验表明,该系统具有良好的人机交互界面,使仿真人员产生身临其境的"真实"感觉。 相似文献
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对建模和仿真的HLA(高层体系结构)的FEDEP(联邦开发和执行过程模型)进行了深入分析,剖析了HLA应用开发过程和仿真程序设计方法。提出了基于HLA的通用虚拟显控台技术和开发环境,并给出了实现方法。为增强系统的功能和灵活性,提出了层次式智能虚拟部件和智能控件化虚拟显控台系统的概念。 相似文献
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A virtual cockpit for a distributed interactive simulation 总被引:4,自引:0,他引:4
McCarty W.D. Sheasby S. Amburn P. Stytz M.R. Switzer C. 《Computer Graphics and Applications, IEEE》1994,14(1):49-54
We developed the virtual cockpit as an inexpensive flight simulator, using off-the-shelf equipment. This system functions as a component of a distributed interactive simulation. Any flight simulator has three principal tasks: image display, image generation, and flight dynamics. We built the flight simulator, the virtual cockpit, using a head-mounted display (HMD) to display the out-the-window imagery and the cockpit interior. The virtual cockpit consists of a Silicon Graphics workstation and supporting hardware components, such as an HMD and position tracker. The software falls into three areas by function: flight dynamics and cockpit instruments; network interface (either SimNet or DIS PDUs); and display of the out-the-window view. The virtual cockpit developed uses a multiprocessor Silicon Graphics Iris (the 4D/440VGXT) connected to a Polhemus Laboratories fiber-optic head-mounted display, a Polhemus magnetic head tracker and a hands-on-throttle-and-stick (HOTAS) by Thrustmaster. The software uses the AT and T C++ translator and the Silicon Graphics C compiler running under Irix 4.0.5. a Unix operating system. We use Software Systems' MultiGen to create the geometric models and the terrain database 相似文献
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陈又军 《电脑编程技巧与维护》2011,(14):110-112
实时交互式飞机驾驶舱虚拟仿真是开发一种对虚拟图形化的飞机驾驶舱各种设备进行实时操作的人机环境。它是开发其他更深层次飞行仿真软件、机务训练软件的基础。OpenGL图形库作为一个强大的通用图形开发库,可实时生成人机环境所需的图像。通过在各软件模块中鼠标消息的传递、分析和处理,让人参与到该环境中,成为仿真回路的一个环节,也能控制虚拟飞机和驾驶舱设备。 相似文献
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本文针对虚拟座舱系统中虚拟模型的特点,分别对规则模型和非规则模型的建模算法进行了深入研究,实现了三维真实感模型的生成与简化。 相似文献
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本文针对虚拟座舱系统中虚拟模型的特点,分别对规则模型和非规则模型的建模算法进行了深入研究,实现了三维真实感模型的生成与简化。 相似文献
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Direct curvature scale space: theory and corner detection 总被引:1,自引:0,他引:1
The curvature scale space (CSS) technique is considered to be a modern tool in image processing and computer vision. direct curvature scale space (DCSS) is defined as the CSS that results from convolving the curvature of a planar curve with a Gaussian kernel directly. In this paper we present a theoretical analysis of DCSS in detecting corners on planar curves. The scale space behavior of isolated single and double corner models is investigated and a number of model properties are specified which enable us to transform a DCSS image into a tree organization and, so that corners can be detected in a multiscale sense. To overcome the sensitivity of DCSS to noise, a hybrid strategy to apply CSS and DCSS is suggested 相似文献
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飞机显示器自动测试系统设计 总被引:1,自引:0,他引:1
为了克服传统飞机显示器测试手段存在的效率低、成本高等弊端,研制了一种基于工控机、虚拟仪器技术的自动测试系统,并详细介绍了系统的整体结构以及硬件、软件设计方法。该系统利用工控计算机的强大功能,硬件采用电路模块化设计技术,成功实现了飞机显示器的显示与通信;软件完成信号控制、测试结果分析以及显示。该系统采用了现代化模块设计思想和手段,检测速度快、可靠性高、扩展性强,实现了对飞机显示器的自动化测试。 相似文献
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With the growing demand in e-learning system, traditional e-learning systems have dramatically evolved to provide more adaptive ways of learning, in terms of learning objectives, courses, individual learning processes, and so on. This paper reports on differences in learning experience from the learner’s perspectives when using an adaptive e-learning system, where the learner’s knowledge or skill level is used to configure the learning path. Central to this study is the evaluation of a dynamic content sequencing system (DCSS), with empirical outcomes being interpreted using Csikszentmihalyi’s flow theory (i.e., Flow, Boredom, and Anxiety). A total of 80 participants carried out a one-way between-subject study controlled by the type of e-learning system (i.e., the DCSS vs. the non-DCSS). The results indicated that the lower or medium achievers gained certain benefits from the DCSS, whilst the high achievers in learning performance might suffer from boredom when using the DCSS. These contrasting findings can be suggested as a pragmatic design guideline for developing more engaging computer-based learning systems for unsupervised learning situations. 相似文献
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驾驶舱飞行员认知行为一体化仿真建模 总被引:3,自引:0,他引:3
针对国内航空领域飞行员认知行为一体化建模研究较少,运用ACT-R认知架构对民机飞行员驾驶技能获得、提取和运用的内在机制进行建模。对飞行员驾驶飞机的认知过程进行划分;以驾驶舱中出现频率最高的典型飞行任务--飞行员告警信息感知、处理与决策为对象进行实验设计和一体化仿真;对实验操作和模拟仿真进行对比,表明ACT-R认知体系能够指导推进驾驶舱人机工效一体化中飞行员仿真理论与模型研究的发展,为驾驶舱优化设计与评估提供深层次的支撑。 相似文献