Research On Dual CPU Hot-Redundancy Technology Of Flight Control Computer

Most countries in the world attach importance to the use of Long-time UAV (unmanned aerial vehicle) in the military. The kernel question of Long-time UAV is how to improve the reliability of flight control computer. The research of how to improve the reliability of flight control computer has became more and more important today. The paper studies the project of improving the reliability of flight control computer by using the Dual CPU Hot-redundancy technology. We implement the Dual CPU Hot-redundancy technology into the common UAV which used PC/104 in our country. The reliability of flight control computer can be improved rapidly only if we increase a little hardware and software by the Dual CPU Hot-redundancy technology. The method can be used for many flight control computers easily. The Dual CPU Hot-redundancy technology became a method to improve the reliability of flight control computer.Firstly, we complete the design of the Dual CPU Hot-redundancy Flight Control System project by the comparison of fault-tolerant projects.Secondly, we analyze the reliability of the Dual CPU Hot-redundancy Flight Control System by the Combined Model Theory in this paper.Thirdly, the hardware design of Dual CPU Hot-redundancy is completed with in this paper, which is based on the project. The hardware includes dual-port RAM and I/O switch electric circuit.Fourthly, the software design of Dual CPU Hot-redundancy is completed with in this paper, which is based on the project and hardware.Finally, the fault-tolerant design adopts the technology of Dual CPU Hot-redundancy in the sample UAV. The result shows that the design is conscientiously feasible in project by the analysis effect of the sample UAV.