基于VXI总线的飞机航姿设备综合测试诊断系统

为实现对飞机航姿系统的综合测试与故障快速诊断,采用VXI总线技术建立了飞机航姿没备综合测试系统,并设计了一个基于知识的故障诊断专家系统;对该系统的硬件和软件组成进行了介绍,对关键技术问题进行了分析并提出了解决办法;该测试诊断系统极大提高了航姿设备的维修与排故效率。     

机载火控系统远程故障诊断

对作战飞机火控系统的故障诊断，传统的方法是使用多种检测仪器对机载火控设备进行性能检查，技术含量低，不能满足现代战争的需要。为提高部队的作战效能，采用传感器应用技术、微电子技术、VXI总线技术和计算机测量与控制技术，研制了机载火控系统远程故障诊断设置；该装置在实际应用中取得了良好效果，并具有诊断结果准确、自动化程度高、工作稳定可靠、操作简便、易于转移和维护等优点，为技术人员进行机载火控系统的性能检测与故障诊断提供了便利。     

基于虚拟仪器的某发射设备故障诊断系统

为实现对某发射设备快速故障定位,基于虚拟仪器技术设计开发了该设备的故障诊断系统,详细阐述了系统软硬件的设计与实现方法;针对顺序控制的特点,提出了按工步进行故障诊断的思想;利用数字滤波技术有效地消除了干扰,提高了诊断结果的可靠性;使用表明,系统性能稳定可靠,故障定位快速准确,极大地提高了设备维修保障效率和生存能力.     

一种空空导弹发射装置故障诊断仪设计

导弹发射装置是目前我国某型战斗机所装备的主要作战武器之一,它的性能直接影响到战斗机的战斗能力,由于目前缺乏有效的故障诊断系统和仪器对导弹发射装置进行测试,所以设计了一种空空导弹发射装置故障诊断仪器;该仪器以工业控制计算机为核心,采用数据库编程技术编程,综合运用标准接口及总线技术、故障诊断技术,FIFO技术,有效地提高了仪器的通用性、可靠性;研究结果表明,该仪器能够对某型空空导弹发射装置的各种故障进行快速准确的诊断,提高部队的保障能力,具有很好的推广应用前景和重大的经济效益.     

飞机平显自动测试系统的研制与开发

采用虚拟仪器技术研制了一种用于对飞机核心电子部件平视显示系统(平显)进行故障检测和维修的网络化自动测试系统。该系统采用分布式网络结构,硬件平台基于高可靠的PXI／CPCI,软件采用LabWindows／CVI开发,用户只需要通过简单键盘鼠标操作即可完成复杂现场测试。实际运行表明,该系统具有用户界面友好、操作方便等优点,提高了测试的效率和准确性,并有效节省了测试成本与维护费用。     

一种筒弹测试故障模拟器系统设计

为了测试人员能在平时使用模拟器系统进行测试训练;设计并实现了一种筒弹测试故障模拟器系统,对该系统的结构进行了设计,给出了资源配置框图,根据任务需求确认了筒弹测试故障模拟器系统的硬件设计原理和软件设计流程,该系统能对筒弹基本电气性能和测试接口进行模拟,通过操作故障模拟器软件,选择相应的故障类型,并通过网线,将所选故障类型相对应的指令发送到主控插箱,主控插箱依据所选故障进行操作,将测试结果通过测试电缆输出到筒弹测试设备,实现模拟筒弹正常测试项目和模拟筒弹测试故障等功能,应用结果表明,该系统运行可靠,各项功能及技术指标均符合设计要求;可以有效地对测试人员进行基础训练,故障诊断与排除训练,有效地提高了测试人员工作效率,很好的完成测试人员对筒弹测试的操作训练任务。     

基于模糊神经网络的平显设备故障诊断研究*

针对平视显示器（HUD）设备自检测和地面故障诊断设备的不足,提出了一种基于模糊BP神经网络的HUD故障诊断方法。简化了故障诊断系统的结构,实现了自动性能检测和故障诊断,能够有效地辨识故障源,隔离了从LRU 级到SRU级的故障,并给出了典型测试项的故障诊断实例。作为一种先进有效的故障诊断技术已经应用于某型飞机HUD和相关系统的故障诊断。     

机载设备测试性建模与应用

测试性模型是进行测试性仿真、设计、分析、评估的基础和关键。该文描述了设备测试性建模方法与测试性建模流程,为实现对复杂系统的测试性分析及故障诊断,获取有指导意义的诊断策略服务实际应用。测试性设计中采用多信号流建模技术,分层次建立某型机载音频设备的测试性模型;对设备故障模式、故障影响的分析归纳,收集各层级设备故障模式样本形成FMEA分析表;运用计算机建模仿真工具辅助,构建了定量化的测试性模型;通过模型仿真获得被测设备故障检测率、隔离率以及相关故障诊断流程;经测试性指标对比分析及测试性试验验证,发现该测试性模型中薄弱环节,经过迭代模型、改进测试性方案后,显著提高了设备的测试性指标,满足设备的应用使用需求。     

某高炮通信系统性能检测与故障诊断系统设计

由于某高炮通信系统结构复杂、技术先进,技术保障难度大,部队在形成装备保障能力方面还存在很大差距,主要是缺乏故障诊断设备,归根结底是缺乏有效的测试手段和适用的故障诊断技术;作者针对高炮通信系统,设计了高炮通信系统性能检测与故障诊断系统;该系统采用主控机与测试机的分离式结构,其中主控机由便携式微机组成,测试机由工控机和各功能模块组成;此系统可对自行高炮通信系统的性能进行自动检测和故障诊断;实验结果表明,该系统效果良好,为高炮武器系统的技术保障提供了一种实用的方法。     

移动无尘检修车间设备运行故障诊断方法设计

移动无尘检修车间内最重要的除尘设备是否出现故障，是整个车间设备运行是否正常的关键，因此，针对其除尘设备，构建了一种由智能终端、云平台以及远程监测系统组成的故障诊断系统，首先，介绍了该系统的整体设计构架；其次，对选择系统硬件设备和设计系统软件部分；之后，提出基于小波分析的故障检测方法，并以清灰系统中出现的漏气故障与不喷吹故障对其进行测试验证；然后测试系统硬件是否正常运行；最后，将故障诊断系统用于移动无尘检修车间进行现场测试。综合实验结果表明：由智能终端、云平台以及远程监测系统组成的故障诊断系统能够对移动无尘检修车间内的设备运行实时数据进行采集显示并能够对故障进行正确诊断。     

现代运输类飞机HUD应用人为因素研究

本文论述了现代运输类飞机HUD功能及应用原理,通过工程心理学相关理论分析了HUD应用存在的人为因素问题,并提出了HUD在驾驶舱应用的成功准则和方法。     

Effects of perception of head-up display on the driving safety of experienced and inexperienced drivers

In this human subject study about interaction with head-up displays (HUDs), the impacts of three types of HUDs (flag, perspective, and flag and perspective) on experienced and inexperienced drivers were subjectively and objectively measured. The driving experiment divided 60 participants into two groups (experienced and inexperienced) and assessed their driving experiences in real high- and low-level driving tasks using the three types of HUDs. During the subjective performance evaluation, the participants executed secondary display tasks and performed a primary driving task with eye-tracking and physiological monitoring. The flag and perspective display (display FP) and the perspective display (display P) were more effective in helping drivers execute simple tasks and complex tasks, and both experienced and inexperienced drivers were HUD-dependent. Based on the study, we provided an optimized design strategy for the HUD interface. Also, we suggest the HUD design should give special consideration for inexperienced drivers.     

Influence of head-up displays’ characteristics on user experience in video games

Head-up displays (HUD) are important parts of visual interfaces of virtual environments such as video games. However, few studies have investigated their role in player–video game interactions. Two experiments were designed to investigate the influence of HUDs on player experience according to player expertise and game genre. Experiment 1 used eye-tracking and interviews to understand how and to what extent players use and experience HUDs in two types of commercial games: first-person shooter and real-time strategy games. Results showed that displaying a permanent HUD within the visual interface may improve the understanding of this environment by players. They also revealed that two HUD characteristics, namely composition and spatial organization, have particular influence on player experience. These critical characteristics were manipulated in experiment 2 to study more precisely the influence of HUD design choices on player experience. Results showed that manipulation of design of these HUD characteristics influences player experience in different ways according to player expertise and game genre. For games with HUDs that are perceived as very useful, the higher player expertise is, the more player experience is influenced. Recommendations for video game design based on these results are proposed.     

The effects of a simulated head-up display speedometer on perceptual task performance

This study compared the effects of simulated head-up display (HUD) and dashboard-mounted digital speedometers on key perceptual driving tasks in a simulated driving environment. Subjects were 20 male and female volunteers ranging in age from 19 to 51 years. A videotape, taken from the driver's perspective, of a car traveling along a memorized route served as the test scene. While viewing the test scene subjects performed tasks related to navigation, speed monitoring, and salient cue detection. The simulated HUD speedometer produced generally superior performance on the experimental tasks; most important, it enabled subjects to respond significantly more quickly to the salient cues. Implications for the effects of HUDs on automobile safety are discussed.     

Pathway HUDs: are they viable?

We describe two experiments that examine 3D pathway displays in a head-up location for aircraft landing and taxi. We address both guidance performance and pilot strategies in dividing, focusing, and allocating attention between flight path information and event monitoring. In Experiment 1 the 3D pathway head-up display (HUD) was compared with a conventional 2D HUD. The former was found to produce better guidance, with few costs to event detection. Some evidence was provided that attentional tunneling of the pathway HUD inhibits the detection of unexpected traffic events. In Experiment 2, the pathway display was compared in a head-up versus a head-down location. Excellent guidance was achieved in both locations. A slight HUD cost for vertical tracking in the air was offset by a HUD benefit for event detection and for lateral tracking during taxi (i.e., on the ground). The results of both experiments are interpreted within the framework of object- and space-based theories of visual attention and point to the conclusion that pathway HUDs combine the independent advantages of pathways and HUDs, particularly during ground operations. Actual or potential applications include understanding the costs and benefits of positioning a 3D pathway display in a head-up location.     

LabWindows/CVI5.0在平显模拟系统中的应用

平显模拟系统以功能强大的交互式可视化的LabWindows/CVI5 0和OpenGL为编程平台开发应用软件 ,实现逼真模拟平显的功能。介绍了构建平显模拟系统的硬件组成 ,重点讨论了双机通讯、平显画面的显示。其特点是开发方便 ,投资少 ,具有较高的经济和军事效益     

High‐efficiency switchable optical elements for advanced head‐up displays

The Pancharatnam‐Berry optical elements (PBOEs) are utilized to enhance the performance of head‐up displays (HUDs). The Pancharatnam‐Berry lenses (PBLs) provide varifocal functionality and compensate chromatic aberrations, while the Pancharatnam‐Berry deflectors (PBDs) can function as optical combiners and waveguide couplers. Moreover, the Rigorous coupled wave analysis (RCWA) based on the scattering matrix is developed and applied in the structure optimization of PBOEs for HUD applications.     

平视显示器字符亮度及线宽测量系统

传统平视显示器字符亮度及线宽测量方法采用人工点对点式测量,费时,工作量大,测量结果易受主观因素影响。为实现标准化自动快速测量,本文提出了基于CCD式亮度计的字符亮度及线宽的测量系统。通过对平视显示器字符显示特性分析,确定了测量系统中的亮度测量的关键参数和线宽测量的高斯拟合半亮度线宽算法,并结合六自由度电控旋转平移台搭建了相应的测量系统,最后通过亮度测试和线宽测试实验验证了本系统的可靠性与准确性。     

Micromirror based virtual image automotive head-up display

Microsystem Technologies - A micromirror based virtual image head-up Display (HUD) system for automobile is presented. This auto-HUD includes a micromirror laser vector scanning display module, a...     

Examining the Effects of Conformal Terrain Features in Advanced Head‐Up Displays on Flight Performance and Pilot Situation Awareness

Synthetic vision systems (SVS) render terrain features for pilots through cockpit displays using a GPS database and three‐dimensional graphical models. Enhanced vision systems (EVS) present infrared imagery of terrain using a forward‐looking sensor in the nose of an aircraft. The ultimate goal of SVS and EVS technologies is to support pilots in achieving safety under low‐visibility and night conditions comparable to clear, day conditions. This study assessed pilot performance and situation awareness (SA) effects of SVS and EVS imagery in an advanced head‐up display (HUD) during a simulated landing approach under instrument meteorological conditions. Videos of the landing with various HUD configurations were presented to eight pilots with a superimposed tracking task. The independent variables included four HUD feature configurations (baseline [no terrain imagery], SVS, EVS, and a combination of SVS and EVS), two visibility conditions, and four legs of the flight. Results indicated that SVS increased overall SA but degraded flight path control performance because of visual confusion with other display features. EVS increased flight path control accuracy but decreased system (aircraft) awareness because of visual distractions. The combination of SVS and EVS generated offsetting effects. Display configurations did not affect pilot spatial awareness. Flight performance was not different among phases of the approach, but levels and types of pilot SA did vary from leg to leg. These results are applicable to development of adaptive HUD features to support pilot performance. They support the use of multidimensional measures of SA for insight on pilot information processing with advanced aviation displays. © 2012 Wiley Periodicals, Inc.