ARINC 429 communication redundancy method based on vxworks operation system

Abstract

The invention discloses an ARINC 429 communication redundancy method based on a vxworks operation system, mainly solving the problems of unreliability, low instantaneity and complex design of the redundancy method in the existing instant communication system. The method of the invention has the follow realizing procedures: in an upper computer and a CPU communication system, the upper computer communicates with CPU via two independent ARINC 429 channels, namely a main channel A and a spare channel B; the working sequence and the transmitted data of the two channels are identical; CPU stores data received from the two channels via two different circular buffer zones; before receiving data each time, CPU calls a channel choice function; firstly, the channel choice function judges the number of bytes in the two buffer zones, and detects and chooses a channel according to different situations of the number of bytes in the two buffer zones. The method fully utilizes the circular buffer zone operation function in vxworks, and simplifies the process of anomaly detection and information synchronization to treat faults in time, so that the reliability and the instantaneity of the system can be ensured in software.

Description

technical field [0001] The invention relates to the technical field of communication of real-time systems, in particular to an ARINC429 communication redundancy method based on vxworks. Background technique [0002] The Vxworks operating system is an embedded real-time operating system designed and developed by Winder River Corporation of the United States in 1983. The system provides high-efficiency real-time multitasking while providing good scalability, that is, the main components of the system can be implemented according to the requirements of the application. Add or subtract. [0003] ARINC429 is an aerospace-specific serial communication bus protocol. Due to the high speed and reliability of the information transmitted by ARINC429 itself, it has been used as a general serial transmission bus standard in almost all aircraft avionics systems. However, various environmental factors on the aircraft, such as jitter, high and low temperature, humidity and electromagnetic...

AI Technical Summary

Problems solved by technology

[0004] At present, the simplest and most effective redundancy technology often used in communication systems is hardware redundancy technology. To detect faults, thereby realizing communication redundancy, this method has the following technical bottlenecks: (1) when the hardware detection circuit itself breaks down, it cannot monitor the state of the master-slave channel, nor can it complete the automatic switching function of the master-slave channel; (2) ) Due to the need to design hardware circuits, the design and implementation of communication systems are complicated, and additional unreliable factors are introduced

[0005] Another example is the "Design and Realization of Information Redundancy" mentioned in the article "The Redundancy Design of Aviation ARINC429 Bus Communication", which is the ARINC429 communication redundancy realized by cyclic redundancy check (CRC). The disadvantage of redundancy, but the encoding is more complicated, which increases the load of the link

[0006] In addition, real-time performance is an important requirement in the communication technology field of real-time systems. The redundancy methods mentioned above increase the complexity of the system and the difficulty of design to a certain extent, which will inevitably reduce the real-time performance of the system.

Images