基于MECT软件包的DMIS软件接口设计

论述了基于MECT软件包的DMIS标准化的软件接口设计.该软件接口通过面向对象编程技术可实现DMIS格式数据与MECT软件包的动态数据通信,完成DMIS程序控制下的自动化测量.提供了一个对现有坐标测量软件进行升级使之符合DMIS规范的实例,对尺寸测量软件的DMIS标准化具有很好的借鉴意义.     

New low cost avionics with INS/GPS for a variety of vehicles

Development of a new vehicle avionics suite is described, including integration of a low-cost, tightly-coupled integrated Inertial Navigation System/Global Positioning System (INS/GPS) to support vehicle guidance, navigation, and control (GN&C). A wide variety of next-generation low-cost launch vehicles could potentially benefit from integrated INS/GPS technology for GN&C and/or range safety applications. Coleman Aerospace Company (CAC) has developed a new low-cost avionics suite, the generic Integrated Mission Guidance & Tracking System (IMGTS), an open architecture, modular system that supports the requirements for various guidance applications and range safety tracking. As part of this development, Boeing North American, Inc. is supplying its Modular Miniature Integrated GPS/INS Tactical System (M-MIGITS^TM) Military-Off-The-Shelf (MOTS) INS/GPS product to support CAC's IMGTS GN&C     

GPS/BDS/INS tightly coupled integration accuracy improvement using an improved adaptive interacting multiple model with classified measurement update

An Extended Kalman Filter (EKF) is commonly used to fuse raw Global Navigation Satellite System (GNSS) measurements and Inertial Navigation System (INS) derived measurements. However, the Conventional EKF (CEKF) suffers the problem for which the uncertainty of the statistical properties to dynamic and measurement models will degrade the performance. In this research, an Adaptive Interacting Multiple Model (AIMM) filter is developed to enhance performance. The soft-switching property of Interacting Multiple Model (IMM) algorithm allows the adaptation between two levels of process noise, namely lower and upper bounds of the process noise. In particular, the Sage adaptive filtering is applied to adapt the measurement covariance on line. In addition, a classified measurement update strategy is utilized, which updates the pseudorange and Doppler observations sequentially. A field experiment was conducted to validate the proposed algorithm, the pseudorange and Doppler observations from Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS) were post-processed in differential mode. The results indicate that decimeter-level positioning accuracy is achievable with AIMM for GPS/INS and GPS/BDS/INS configurations, and the position accuracy is improved by 35.8%, 34.3% and 33.9% for north, east and height components, respectively, compared to the CEKF counterpart for GPS/BDS/INS. Degraded performance for BDS/INS is obtained due to the lower precision of BDS pseudorange observations.     

基于MOTOROLA D15手机模块的无线发送模块的设计

应用Motorola D15手机模块设计GPS系统中的无线发射部分，在硬件设计部分介绍了手机模块与微处理器的连接关系，而在软件部分介绍了AT指令、编码过程和发送过程。     

Advanced Data Management Experiment

This project is to demonstrate and refine a computer programming concept known as Generalized Data Management as exemplified by the Advanced Data Management (ADAM) System developed by the MITRE Corporation for the Electronic Systems Division/MITRE Systems Design Laboratory. ADAM is designed to provide generalized routines for functions common to a large class of command and management problems. Although earlier implementations of the Generalized Data Management concept have been demonstrated, ADAM has not been demonstrated in an operational application. The Air Force Logistics Command has provided an application (Category I and IIR Consumption Item Requirements Computation System) with which to test ADAM. The Requirements System provides Logistics Command managers with information concerning stock items to buy, procurement contracts to terminate, items to repair, and budgets. ADAM implementation will provide an on-line real-time information system; the present Requirements System operates in a non-real-time batch processing mode. The usefulness of providing an on-line system, which can be easily modified, will be evaluated.     

基于ARINC 615A的无人机地面站软件加载设计研究

当前无人机地面站软件升级缺乏标准,而地面站软件架构复杂、规模巨大,需要一套标准的软件升 级协议保证无人机地面站软件升级的安全性和高效性。本文在深入研究ARINC 615A 数据加载协议的基础上, 根据地面站领域的实际情况,对ARINC 615A 协议进行了裁剪和适用性优化,设计了一套适合地面站领域的标 准软件升级协议,用于保证无人机地面站软件升级的标准、安全和高效。     

CFD数据交易标准及其软件实现

论述推行统一的CFD数据交换标准的必要性 ;报告在研制通用航空气动力数值模拟系统ANSS2 0 0 0过程中 ,建立内部数据接口文件规范的尝试 ;推荐国际上主流的空气动力学和CFD数据库标准———CGNS ;讨论CGNS在ANSS2 0 0 0中的实现 ;大力呼吁同步使用与国际接轨的CFD数据交换标准。     

卫星导航进近技术进展

全球卫星定位系统（GNSS）增强系统能提供全天候无间断的卫星导航信号，可以辅助飞机进行进近。本文介绍了全球卫星导航系统进近着陆系统的基本组成、工作原理和功能特点，并对国内外研究进展进行了阐述。针对GNSS进近研究中的热点问题，重点论述了地基增强系统（GBAS）、星基增强系统（SBAS）、用户自主完好性监测（RAIM）等技术的发展现状，指出了GNSS进近技术实际工程应用仍然存在的问题，探讨了GNSS进近技术未来的发展方向。     

General aviation aircraft avionics: integration & system tests

The avionics of current-day aircraft is termed as modular integrated full glass cockpit. Unlike lots of dials and gauges, the pilot will interact with Multi-Function Displays (MYD). This means that the systems are coupled with multi-function displays, communication and navigation radios with control units, multi-mode interactive instruments for control and navigation, recording and fault management systems, airframes and health monitoring diagnostic capabilities. Pilot Vehicle Interface (PVI) is an important measure of good avionics and cockpit layout, which implies the optimization of man-machine interface, enhancement of the economy, and safety of flight operations. This presents the avionics architecture of a 14-seat Light Transport Aircraft (LTA) for general aviation, which has multi-role commuter capabilities. LTA is a twin turbo-prop, multi-role aircraft, with air taxi and commuter services as its primary roles. The avionics is built on the digital communication mode for both command and control with current requirements of TCAS, digital Autopilot, and AMLCD multi-purpose glass displays. The LTA Avionics suite is grouped into six major groups based on functionality: Display System, Communication System, Navigation System, Recording System, Radar System, and Engine instruments and other cockpit displays. This paper also covers details about the extensive tests carried out to prove the avionics design in terms of functionality, inter-operability, interference, and compatibility. Various practical integration and flight-test issues, methodologies, and details of the scenarios is presented herein.     

液体火箭发动机地面试车故障检测的自适应阈值算法

提出一种自适应阈值故障检测算法,其检测阈值由实时估计的参数均值、标准差及由训练算法得到的带宽系数计算。用某发动机22次点火试验的试车数据进行离线故障检测,结果表明其综合性能优于红线系统和SAFD算法。     

A novel optimal data fusion algorithm and its application for the integrated navigation system of missile

For Inertial Navigation System(INS)/Celestial Navigation System(CNS)/Global Navigation Satellite System(GNSS) integrated navigation system of the missile, the performance of data fusion algorithms based on the Cubature Kalman Filter(CKF) is seriously degraded when there are non-Gaussian noise and process-modeling errors in the system model. Therefore, a novel method is proposed, which is called Optimal Data Fusion algorithm based on the Adaptive Fading maximum Correntropy generalized high-degree...     

中央维护系统概念及其应用

二十世纪八十年代以来,国外航空界研制开发了民用直升机的健康与使用状况监控系统(HUMS),并将这一概念引入军机,先后建立了用于军用直升机的联合先进飞机健康与使用状况监控系统(JAHUMS)项目和用于歼击机的故障预测与健康管理(PHM)项目,本文基于当前国外HUMS的发展状况,借鉴JAHUMS和PHM的构想,将HUMS概念引入到民用固定翼飞机中央维护系统(CMS)中,对CMS概念、应用和其关键技术进行了初步探讨。     

Safe Flight 21: ground broadcast service system

The FAA-initiated Safe Flight 21 program is a cooperative government/industry effort to evaluate enhanced aerodome and aircraft capabilities based on evolving communications, navigation and surveillance (CNS) technologies. Safe Flight 21 will demonstrate the in-cockpit display of traffic, weather, terrain, and obstacle information for pilots and will provide improved information to controllers. The Ground Broadcast Service (GBS) System will act as the main communication service between the Safe Flight 21 sensors and both the avionic and ground vehicle users. The data, collected and processed by multiple sensors, is routed to the GBS System for formatting, broadcast timing coordination, filtering, and transmission to the end-users. This paper provides an overview of the GBS System as part of the FAA Safe Flight 21 program. It also presents the GBS System's complete functional requirements as well as user interface formats and protocols necessary for compliance with the Safe Flight 21 Program architecture.     

THE CLUSTER DATA PROCESSING SYSTEM: A DISTRIBUTED SYSTEM IN SUPPORT OF A CHALLENGING SCIENTIFIC MISSION

The Cluster mission is aimed at the study of small-scale structures that are believed to be fundamental in determining the behaviour of key interactive processes of cosmic plasma. The mission will be controlled from the European Space Operations Centre (ESOC). ESOC is also in charge of the commanding of the scientific payloads on-board the four Cluster spacecraft after negotiation with the Cluster Principal Investigators (PIs) and of collecting and distributing the mission's scientific results to the Cluster community. This paper describes the process of translating the scientific requirements of the Cluster mission into a data-processing system supporting the mission via the definition of an appropriate operational scenario. In particular, the process of negotiation between the PIs and ESOC to command the spacecraft is mediated by the Joint Science Operations Centre (JSOC) and finalised by the Cluster Mission Planning System (CMPS) while the return of the data to the Cluster community is actuated by the Cluster Data Disposition System (CDDS). The Cluster Mission Control System (CMCS) provides the interface between these two systems and the spacecraft. These elements constitute the Cluster Data-Processing System (CDPS).     

用于航空电子系统升级的二进制翻译系统

针对目前航电系统硬件平台的升级而导致的原有的经过验证的软件资源不可用的问题,提出了一个用于航空电子系统升级的二进制翻译系统(BTASUP).该系统将解释和动态二进制翻译结合起来,在PPC上实现了对1750A二进制可执行代码的透明执行.采用了快速模拟、直接替换段等技术提高了系统的运行效率及适应性.开发的验证工具VERBT验证了系统的功能及效率.验证结果表明系统能对原有的环境进行正确的仿真(/模拟),代码的运行速率满足原系统的要求.     

Open systems architecture for integrated RF electronics

The Integrated Sensor System (ISS) program is defining an Open System Architecture (OSA) for Radio Frequency (RF) electronics, which represent the largest portion of an advanced aircraft's avionics flyaway cost. An integrated architecture is used to reduce costs in a number of ways, including time-sharing, centralization of resources, and reduction of the number of unique module types. The OSA approach extends these cost reductions by simplifying technology insertion, using well-understood standards, and increasing use of commercial hardware and software. This paper describes interim results. The work was funded by the Open Systems Joint Task Force (OS-JTF)     

飞机维修信息管理系统

基于机载中央维护系统(CMS),提出了飞机维修信息管理系统(AMIMS),以进一步提高飞机的安全性,降低维修和运行成本;并详细讨论了AMIMS的组成、功能、关键技术及其解决途径。     

Measuring Aircraft Carrier Flexure in Support of Autonomous Aircraft Landings

This paper quantifies the experimental measurements of aircraft carrier flexure (deformation) at sea in support of the United States Department of Defense sea-based Joint Precision Approach and Landing System (JPALS) that aims to deliver automatic landing capabilities to inbound aircraft aboard aircraft carriers. The methodology for measuring ship flexure using the Global Positioning System (GPS) and inertial sensors is described. Results indicate that flexure on the aircraft carrier used for testing has a standard deviation of approximately 1–2 cm. For the ship tested, the most significant flexure effects are in the port/starboard direction and correlate best with roll or lateral acceleration.     

New approach to a multistatic passive radar sensor for air/spacedefense

A method to apply the latest technology in Global Navigation Satellite Systems (GNSS), in particular the U.S. NAVSTAR GPS (NAVigation System for Timing And Ranging Global Positioning System) and the Russian GLONASS (GLObal'naya Nqvigatsionnaya Sputnikovaya Sistema), as a silent multistatic or parasitic radar for air defense is described. These satellite systems serving as navigational aids are well suited for low power radar applications due to the similarity and compatibility of the transmitted satellite signals with modern radar signals, such as spread spectrum modulation and Pseudo Random Noise (PRN) codes. Preliminary flight tests with airships, jet and propeller aircraft, helicopter, anti tank missiles and spaceborne targets (MIR) to study effects have been conducted     

Tracking of DABS-Equipped Aircraft

The Discrete Address Beacon System (DABS) is scheduled to replace the Air Traffic Control Beacon System (ATCRBS) as the prime sensing tool for air traffic control in the 1980's. The design of DABS requires knowledge of the tracking accuracy obtainable as a function of various system parameters. In particular, the potential value of air-to-ground telemetry of turn-rate data and its effect on intermittent positive control (IPC) must be assessed. The design of DABS tracking algorithms is discussed, and the results obtained with a Kalman tracker simulation are given. The major finding is that turn-rate telemetry of moderate accuracy can improve tracking by a factor of 6 to 10.