• DEVELOPMENT OF A NETWORK-CENTRIC DATA ACQUISITION, RECORDING, AND TELEMETRY SYSTEM

      Moodie, Myron; Newton, Todd; Abbott, Ben; Southwest Research Institute (International Foundation for Telemetering, 2007-10)
      The growth of the Internet and the resulting increasing speeds and decreasing prices of network equipment have spurred much interest in applying networks to flight test applications. However, the best-effort, variable-latency nature of network transport causes challenges that must be addressed to provide reliable data acquisition and timing performance. This paper describes the major issues that must be addressed when designing and implementing real-time networking applications. An overview of a recently implemented large-scale, network-centric data acquisition, recording, and telemetry system for commercial flight test applications provides a real-world example of what is currently achievable.
    • MANAGEMENT OF NETWORK-BASED FLIGHT TEST SYSTEMS

      Moore, Michael S.; Grim, Evan T.; Kamat, Ganesh U.; Moodie, Myron L.; Southwest Research Institute (International Foundation for Telemetering, 2007-10)
      Network-based instrumentation systems are rapidly replacing traditional fixed serial interconnected instrumentation in both commercial and military flight test environments. Modern network-based flight test systems are composed of large numbers of devices including high-speed network switches, data acquisition devices, recorders, telemetry interfaces, and wireless network transceivers, all of which must be managed in a coordinated fashion. Management of the network system includes configuring, controlling, and monitoring the health and status of the various devices. Configuration by hand is not a realistic option, so algorithms for automatic management must be implemented to make these systems economical and practical. This paper describes the issues that must be addressed for managing network-based flight test systems and describes a network management approach that was developed and employed to manage a large-scale network-based flight test system.
    • A WIRELESS NETWORK-BASED RFNET SOLUTION FOR FLIGHT TEST

      Xuming, Fan; Xiaoxian, Bai; Baoqiang, Zhao; Junmin, Zhang; Chinese Flight Test Establishment (International Foundation for Telemetering, 2007-10)
      An rfNET solution based on IEEE 802.11 wireless network is presented to perform one-way remote transmission of airborne instrumentation data and multi-channel video images in flight test by modifying the wireless network bridge and UDP protocol. Its architecture and structure is introduced briefly and the results of ground transmission test and flight demonstration transmission are provided. It also points out the major problems of this solution for engineering application and their solutions.