• Research on Application Technology of Intelligent Wireless Sensor Network in Flight Test

      Chen, Peng; Jiang, Hongwei; Yan, Yihong; Chinese Flight Test Establishment (International Foundation for Telemetering, 2018-11)
      Aimed at the problems of many test parameters, complicated lead wires, large additional weight, lack of flexibility and expandability as well as low level of intelligence and networkability of existing aircraft test flight test systems, with the application requirements of intelligent wireless sensor network for flight test technologies as the lead, this paper makes research on key technologies of intelligent wireless sensor network in aircraft flight test, and focuses on the synchronous acquisition system architecture, real-time protection method, and data transmission reliability checking method and the development of acquisition and recording system for wireless sensor networks based on the iNET standard for aircraft flight test. Besides, this paper also performs simulation and engine ground test verification which laid the foundation for the application of intelligent wireless sensor network technology in aircraft flight test.
    • A Testing Method of Measuring Time Delay of the Flight Test AFDX Avionic System Caused by Data Acquiring Network

      Wang, Jianjun; Peng, Guojin; Yan, Yihong; Chinese Flight Test Establishment (International Foundation for Telemetering, 2018-11)
      Full Duplex Switched Ethernet AFDX is gradually replacing the traditional 1553B as the architecture of the new generation avionics system. AFDX bus has the characteristic of Ethernet delay. However, special needs for measuring avionics AFDX network delay are required to meet in flight test. According to the characteristics of flight test, this paper proposes a method of data acquisition network delay measurement for AFDX avionics system to solve the puzzle of delay measurement. The experiments on a test aircraft demonstrate that the method can improve the calculation accuracy of an avionics system and it’s effective in engineering applications.