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http://dx.doi.org/10.12673/jant.2021.25.4.273

Synchronization Method Design of Redundant Flight Control Computer for UAV  

Lee, Young Seo (Aerospace/Drone R&D Lab, LIG Nex1)
Kang, Shin Woo (Aerospace/Drone R&D Lab, LIG Nex1)
Lee, Hee Gon (Aerospace/Drone R&D Lab, LIG Nex1)
Ahn, Tae-Sik (Aerospace/Drone R&D Lab, LIG Nex1)
Publication Information
Journal of Advanced Navigation Technology / v.25, no.4, 2021 , pp. 273-279 More about this Journal
Abstract
A flight control computer(FLCC) applied to an unmanned aerial vehicle(UAV) is a safety-critical item, and which is designed in a multiple structure to increase the reliability of operation by securing fault tolerance. These FLCC of multiple structure should be designed so that each independent processing/control components can perform the same operation at the same time. And for this reason, a synchronization algorithm for synchronizing the operation between FLCCs should be included in an operational flight program. In this paper, we propose a software design method for synchronization between dual FLCCs applied to UAVs. The proposed synchronization method is designed to synchronize using only the minimum hardware resources to reduce a failure rate. In addition, the proposed synchronization method is designed to minimized synchronization errors due to a timer operation by designing in consideration of operation characteristics of the hardware timer used for the synchronization.
Keywords
Flight control computer; Synchronization method; Synchronization algorithm; Redundant system;
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