Cross channel (CH) data link system of fly-by-light flight control system

Abstract

The invention discloses a cross channel (CH) data link system of a fly-by-light flight control system, comprising a field programmable gate array (FPGA) module, a two-port random-access memory (RAM), an optical / electrical switching circuit, an electrical / optical switching circuit, a 2*2 photoswitch and a wavelength division multiplexer (WDM), wherein the FPGA module respectively communicates with the two-port RAM, the optical / electrical switching circuit, the electrical / optical switching circuit and the 2*2 photoswitch; and flight control computers 2 and 3 are respectively connected with the 2*2 photoswitch by the WDM. On the aspect of hardware of the CH data link system provided by the invention, the photoswitch and the WDM are adopted to realize fault inspection and multi-fault operation; meanwhile, a serial transmission protocol of universal serial buses (USB) is taken, thus ensuring the reliability of information transmission.

Description

technical field [0001] The invention relates to a cross-channel data link system of an optical flight control system, which belongs to the technical field of optical cross data links in flight control systems or the technical field of optical flight control Background technique [0002] Modern aircraft adopt Fly-By-Wire (FBW), which further reduces the weight and volume of the flight control system, saves design and installation time, and improves the quality of the flight control system. However, as the performance requirements of future aircraft continue to increase, electronic equipment will become increasingly complex, leading to an increase in the amount of cables and more complex circuit layouts. The defects of the fly-by-wire control system itself are beginning to emerge, the most important of which is that it cannot defend against electromagnetic interference (EMI). ) and electromagnetic pulses (EMP) caused by lightning, etc. At the same time, future aircraft expect...

AI Technical Summary

Problems solved by technology

Literature [6] presents an optical cross-channel data link implementation scheme, which realizes single-fiber bidirectional information transmission and ring network topology by using an optical wavelength division multiplexer. The advantage is that the number of optical fibers is reduced, But at the same time, it only has single-link fault tolerance, which cannot meet the needs of the development of modern flight control systems in terms of reliability.

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