Study on the Delay of UAV Data-Link Based on TDMA and Aloha Channel Access Protocol

Abstract:

The existing test method for properties of UAV data-link is usually the actual flight test or field "distance" test, which has long test cycle and difficulty for the extraction of test data. In view of this situation, we in this work adopted the data-link semi-physical simulation test platform based on darkroom calibrate-link method, establishing and analyzing the space natural decline model, atmospheric environment model, and aircraft attitude angle model that affecting the transmitting and receiving of signals. Meanwhile, the average delay from-terminal-to-terminal and the fluctuation of the average delay of the UAV under different MAC channel access protocols are discussed using the darkroom calibrate-link method. In order to improve the response characteristics of the UAV, time delay is compensated using optimal control methods, and the effectiveness of the compensation method is validated based on and the platform we built. The simulation results show that, the design of UAV data-link can be calculated by this theory, and the introduction of the optimal control method significantly improves the dynamic response characteristics of the UAV.

• Periodical: Applied Mechanics and Materials (Volumes 333-335)
• Pages: 723-728
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.333-335.723
• Online since: July 2013
• Authors: Wen Zhun Huang
• Keywords: Aloha Channel, Calibrate-Link Method, Delay, TDMA Access Protocol, UAV Data-Link

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