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民航导航台电磁环境测试过程及分析 总被引:1,自引:0,他引:1
0 引言 民航导航台是以各种地面和机载导航设备向飞机提供方位、距离和位置信息,以保障飞机在昼夜间各种气象条件下的安全飞行;负责指挥飞机的起飞、降落以及飞行高度、飞行速度等重要参数. 相似文献
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苏庆福 《电子信息对抗技术》2007,22(6):58-61
在机载测量设备飞行试验中,载机的飞行姿态和航迹对设备的测量精度影响很大。本文研究了如何使用微软DirectX9.0中的Direct3D、DirectDraw、DirectSound等技术再现载机飞行过程,利用Visual C 和DirectX SDK实现了真实感较强的实时图形仿真。通过在地面PC机上重现载机飞行过程,可以减少试验飞行架次,降低试验成本。 相似文献
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机载雷达地杂波仿真分析 总被引:6,自引:0,他引:6
分析了机载预警雷达的地杂波特性 ;针对影响地杂波的参数如载机的飞行速度、飞行高度以及载机飞行方向与雷达天线主波束方向的夹角等 ,进行了仿真分析。 相似文献
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本文描述了联合战术微波着陆系统(TTMLS)机载角度接收机中的信号处理技术,即如何利用综合化数字电子设备设计技术和与飞机结构有关的天线,实现全天候进场和着陆引导.综合化电子设备能在飞机所处的一个极宽范围内检测MLS信号并进行信号处理,为整个军用飞行控制系统和飞机座舱显示给出水平、垂直和航距引导信息.该系统能保证陆海空三军及民用导航的兼容性. 相似文献
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现代机载火控雷达下视显示器的屏幕显示内容,除了需要考虑具有类似地面雷达显示器上的相应功能外,往往还要考虑到适应空战及载机的实际需要,增添某些表征机上武器系统及载机飞行状况的“特色信息”。指示载机飞行姿态的显示信息——飞行姿态线就是其中较有代表性的一种。它可以指示出飞机与地平面的相对关系,使飞行员对载机的瞬时运动有一个比较直观的自我感觉,从而抓住有利战机,克敌制胜。 相似文献
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现代战术机载多模雷达系统可产生陆海测绘图象和武器制导图象,并显示空战中本机周围其它的飞机。该系统必须实时、准确、清晰地为飞行员和机上其他人员提供大量信息。可编程信号处理器(PSP)完成检测目标和产生地图图象的处理。这些系统包括一个专用的硬件单元,即显示处理器单元(DPU)。该单元作为PSP的附加设备,将信息格式化形成图象,在电视式显示监视器上显示。DPU也显示由其它飞机系统提供的专用符号和字母数字信息。 本文介绍一种显示处理器单元(DPU),为机载多模雷达系统产生显示图象。所述DPU的特点是在雷达没有信号发射时能进行显示更新。雷达图象一旦形成,由航空电子设备系统提供的信息可以改变显示图象的位置,按这种模式,载机不易遭受电子干扰。在正常工作期间,该特点还对显示清晰度有显著改善。 本文也讨论了机载多模雷达显示模式和产生显示画面的设备以及所采用的技术。 相似文献
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《电子科技文摘》2006,(4)
0610302导航显示管理计算机的设计及关键技术〔刊,中〕/郑毓琦//航空计算技术.—2005,35(4).—53-56(L)导航信息显示管理计算机通过人机交互向飞机驾驶人员提供各种飞行状态及飞行指引参数,本文以某飞机测控平台辅助导航显示管理计算机设计实现为例,介绍了导航信息显示管理计算机的工作方式、工作流程并探讨了导航信息显示管理计算机的设计特点和关键技术。参40610303芯片数据总线用双低功率和串音免疫编码方案=Duallow-Power and Crosstalk i mmune encoding scheme foron-chip data buses〔刊,英〕/Z.Khan,A.T.Erdogan//Electronics … 相似文献
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针对卫星导航接收机现有测试设备测试仪器分散、连接复杂、自动化程度低、耗费高等问题。本文设计了一种基于虚拟仪器技术的卫星导航接收机自动测试系统,通过PXI总线的工控机及高效的接口适配器为硬件平台采集接收机板的输出信号。上位机软件采用LabVIEW,对采集到的数据进行处理、显示及结果保存。该系统具有易操作、测试精度高、便于扩展、通用性强等优点,极大地提高了复杂系统的测试效率。 相似文献
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HAGA Y. ESASHI M. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2004,92(1):98-114
Great significant progress has been made in the development of biomedical microdevices in recent years, and these devices are now playing an important role in diagnosis and therapy. This paper presents a review of applications of microelectromechanical systems (MEMS) devices for in vivo diagnosis and therapy, and endoscopic- and catheter-based interventions. MEMS technology has enabled the further development of advanced biomedical microdevices for use in the human body by integration of sensors, actuators, and electronics into small medical devices for use in the body. In this paper, we discuss three categories of such devices: navigation systems, sensors and actuators for catheters and endoscopes, and other minimally invasive techniques. A brief introduction to principles, device structures, packaging, and related issues is presented. 相似文献
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Geis M.W. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1991,79(5):669-676
The author reviews some of the device properties of diamonds, as well as recently developed diamond device fabrication techniques for high-frequency, high-power transistors. Two advantages of diamond over other semiconductors used for high-frequency, high power devices are its high thermal conductivity and high electric-field breakdown. Homoepitaxial diamond has been grown by both plasma and hot-filament techniques. The device properties of homoepitaxial diamond produced by the hot-filament technique are reviewed. Much of the development necessary for the production of diamond devices already exists. Doping by homoepitaxy, diamond etching, device quality SiO2-diamond interface, and ohmic contact technology are reviewed. The remaining problems are the development of large area single crystal diamond substrates, improvement of doping techniques, and refinement in ohmic contact technology 相似文献
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在传统的底层硬件体系结构中,一个接口只能连接同种设备。在此,提出智能型接口技术的解决方案,使同一个接口可以连接异种异构设备,将音频系统与智能接口技术结合在一起,进一步完善了当前设备的应用,提高了现有资源的利用率。支持常用的USB存储设备和SD存储设备。 相似文献
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The assembly and use of more new and versatile instrumentation systems is now enhanced dramatically with the widespread application of IEEE Standard 488-1975, "Digital Interface for Programmable Instrumentation." This Standard interface provides an easy-touse high performance concept that links instruments, calculators or computers, and peripheral devices to function as automated instrumentation systems. Microprocessor technology applied to both smart instrumentation and the implementation of IEEE Standard 488's interface functions provides still further benefits to system designers and users. This article describes both the interface function concepts important to instrumentation systems and the roles played by IEEE Standard 488 and microprocessor techniques in support of these functional concepts. Microprocessor and IEEE Standard 488 interface techniques combine to provide designers and users with significant new tools for improved product performance, something neither technology alone could provide. In the near future, special LSI chips optimized to integrate the two technologies should further enhance the benefits for all concerned. 相似文献
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Fehly D. Schlachetzki A. Bakin A.S. Guttzeit A. Wehmann H.-H. 《Quantum Electronics, IEEE Journal of》2001,37(10):1246-1252
The interface between optoelectronic devices and microelectronic circuits is the crucial component in the further development of optical communications, calling for inexpensive mass-produced solutions. We present a procedure for how these diverse elements can be monolithically integrated. A stringent requirement is the compatibility with existing fabrication techniques of microelectronic circuits in silicon. We demonstrate the feasibility of our method by the monolithic integration of a photodetector, based on InGaAs-InP, with a three-stage MOS amplifier on a Si substrate in (100) crystallographic orientation. Basic performance figures (dark current, sensitivity) are comparable to those obtained with test structures on the native InP substrate. We show that the developed technologies can be extended to light-emitting diodes and laser structures displaying efficient electroluminescence 相似文献
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脑-机接口是在人脑与计算机或其它电子设备之间建立的直接的交流和控制通道,通过这种通道,人就可以直接通过脑来表达想法或操纵设备,而不需要语言或动作,这可以有效增强身体严重残疾的患者与外界交流或控制外部环境的能力,以提高患者的生活质量.脑-机接口技术是一种涉及神经科学、信号检测、信号处理、模式识别等多学科的交叉技术.本文对脑-机接口技术的发展、研究现状、工作原理以及涉及的关键技术进行了较为详细地综述,在总结脑-机接口技术存在问题的基础上,探讨了该领域进一步研究的方向. 相似文献
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Antoniac Peter Pulli Petri Kuroda Tomohiro Bendas Dan Hickey Seamus Sasaki Hiroshi 《Wireless Personal Communications》2002,22(2):161-174
HandSmart is one example of wearable device that can be used as a user interface for advanced mediaphones and it is based on MARISIL a Mobile Augmented Reality Interface Sign Interpretation Language. This paper will describe the interface and some of the applications of these new types of personal devices. The user-centered development methodology is discussed in brief at the end of the paper. Evolutions in technology have provided a variety of new opportunities for exploring and discovering virtual 3D worlds. Head-mounted displays and data gloves enable us to interact and immerse much better into the artificial generated 3D environment. Such devices have been advertised in the entertainment media and are recognized by the public as the symbols of virtual reality (VR). Augmented Reality that has the attribute of being more related to real world than VR by overlaying virtual sounds, feelings or visions onto our senses within the real world, can therefore extend our natural experiences. The authors believe that the new generation of mediaphones can embed these new techniques. 相似文献