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

A bus node and fault detection technology, which is applied in the field of computer communication, can solve problems such as communication anomalies, logic anomalies, and high reliability requirements of network node communication, and achieve the effect of ensuring reliability and enhancing redundancy

Active Publication Date: 2015-11-11
AEROSPACE DONGFANGHONG SATELLITE
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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

Method used

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

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Embodiment Construction

[0025] The present invention is a system and method for fault self-detection and recovery of four-channel FlexRay bus nodes on board. The watchdog is used to detect the fault of the four-channel FlexRay bus, and the fault is detected by power-off reset and software re-initialization. failure recovery.

[0026] One FlexRay bus controller supports two channels, for example, FlexRay bus controller A supports FlexRay-A bus and FlexRay-B bus; FlexRay bus controller B supports FlexRay-C bus and FlexRay-D bus; using dual-channel FlexRay bus communication Mode exists FlexRay bus controller single-point problem, in order to ensure the reliable star of satellite electronic system communication, the present invention has adopted the FlexRay bus communication mode of four channels, supports FlexRay-A bus by FlexRay bus controller A and FlexRay bus controller B, FlexRay-B bus, FlexRay-C bus and FlexRay-D bus. The four-channel mode adopts two controllers, FlexRay bus controller A and FlexR...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
Inventor 袁春柱刘思远杨芳
Owner AEROSPACE DONGFANGHONG SATELLITE
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