Fault detection and recovery system and method for four-channel flexray bus nodes on board

Abstract

The invention relates to a space-borne four-channel flexible ray (FlexRay) bus node failure detection and recovery system and a space-borne four-channel FlexRay bus node failure detection and recovery method. A hardware circuit is used for processing interrupt signals of two FlexRay bus controllers of a four-channel FlexRay bus-based node; the signals processed by an interrupt processing unit are transmitted to a processor, and also are transmitted to a failure detection watchdog for dog cleaning as dog cleaning signals; and the watchdog generates a hardware resetting signal to reset the two FlexRay bus controllers if not receiving the dog cleaning signals within a set time, simultaneously generates a failure interrupt signal, and notifies the processor to initialize the two FlexRay bus controllers to finish the failure recovery of the four-channel FlexRay bus-based node.

Description

technical field [0001] The invention relates to a system and method for fault detection and recovery of a star-borne four-channel FlexRay (flexible ray) bus node, belonging to the field of computer communication. Background technique [0002] FlexRay bus is a field bus for serial communication, with a transmission rate of up to 10Mbps, and has high transmission rate, reliability and real-time performance. It has been widely used in the automotive field. For example, the BMW X54.8i electronically controlled shock absorber system, the suspension system and wire control system of the 7X and Audi A8 all use the FlexRay bus. With the continuous maturity of the FlexRay bus technology, many aerospace agencies have also done some research on the FlexRay bus. For example, NASA has done some adaptive exploration on the application of the FlexRay bus in space. The bus has done some preliminary technical research. [0003] A FlexRay bus node consists of a FlexRay bus controller and a ...

AI Technical Summary

Problems solved by technology

For the electronic system on the star, the reliability of the network node communication is very high. This dual-channel redundant design exists in the FlexRay bus controller single point

Since the current FlexRay bus does not have aerospace-grade chips, the on-board FlexRay bus node circuit modules can only use non-space-grade chips. In orbit, they are easily affected by the space environment (especially space particles) and cause logical anomalies, resulting in communication abnormalities or to interrupt

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