High Altitude Long Endurance Uav Flight Control Computer Systems Redundancy Design Technical Research

A high altitude, long endurance unmanned aerial vehicles should be high reliability for achieving kinds of tasks. And using techniques of redundancy fault-tolerance can improve reliability. Focusing on the advance research of the flight control computer system of some type of a high altitude, long endurance unmanned aerial vehicles, this paper analyzes and research its staicture in techniques of redundancy fault-tolerance. Firstly discussing basic type of computer redundant structure and characteristic of the systems, the self-monitoring dual redundancy computer systems is brought forward as the design scheme for the required flight control computer system. The redundant structure is researched about reliability by using Markor model and is carefully designed. Also designed and researched the synchronization scheme for channels, the data transmission scheme for channels, failure logic scheme for channels, the strategies of signals voting and monitoring, computer failure checking scheme about techniques of redundant management. And then the algorithm of redundant management is embedding into embedded real-time operating system VxWorks. Finally the systems structure is simulated in digital method and is researched about fault injection so that its reliability and rationality should be validated. It shows the self-monitoring dual redundancy computer systems which is simple and rational that improve reliability of redundant systems.