Satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system

A CAN bus, self-recovery technology, applied in the field of spaceborne CAN bus, can solve the problems of two controllers returning to normal sending and receiving, low reliability and real-time performance, etc., to achieve high reliability, high monitoring reliability, and improved reliability. Effect

Active Publication Date: 2011-05-11
AEROSPACE DONGFANGHONG SATELLITE
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Problems solved by technology

The above method has the following problems: the fault detection is all realized by software functions, and the reliability and real-time performance of the detection are relatively low; in some fault situations, only the CAN controllers of bus A and bus B can not be reinitialized by software to make the two The controller resumes the normal sending and receiving function

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  • Satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system
  • Satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system
  • Satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system

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Embodiment Construction

[0027] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028]In order to ensure the reliability of communication, the existing spaceborne CAN bus network generally adopts dual CAN bus network, that is, each CAN bus communication node has two communication channels, and the nodes are connected by two cables to form two independent communication channels. When a communication channel fails, another communication channel can be used for communication, and only one communication channel is communicating at any time. Each communication channel includes a CAN bus communication controller and a CAN bus transceiver, and each communication node also includes a processor. The connection relationship is that the processor of the communication node is connected with the CAN bus controller, the CAN bus controller is connected with the CAN transceiver, and the CAN transceiver is connected with the CAN b...

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Abstract

The invention relates to a satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system. Interrupt signals of two CAN controllers based on a double-CAN bus communication node are processed by adopting hardware logic and operation, on the one hand, the output signals are transmitted to a processor for receiving interruption of data, and on the other hand, the output signals are used for generating pulse signals so as to clear a failure monitoring hardware watchdog; when the watchdog does not receive a watchdog clearing signal in the setting time, hard restoration signals are generated to restore the two CAN controllers, and simultaneously, a failure alarm interruption signal is generated to inform the processor to initialize the two CAN controllers so as tofinish the failure restoration of the CAN communication node, therefore, the reliably and the real-time problems of failure detection are solved, meanwhile, the automatic removal of failure is ensured.

Description

technical field [0001] The invention relates to an on-board dual CAN bus node fault self-recovery system, which belongs to the technical field of on-board CAN buses. Background technique [0002] CAN (Controller Area Network) bus is a serial communication field bus, which has the advantages of high reliability, good real-time performance, strong anti-interference ability, flexible communication mode, simple networking, etc., so it has been introduced into the star at home and abroad. Electronic system, even as the backbone network on the star to complete the information transmission between the devices on the star. [0003] The electronic system on the star has high requirements on the reliability of CAN bus network node communication. In order to improve reliability, usually each communication node adopts dual CAN buses, CAN bus A and CAN bus B. However, since most of the circuit modules of the current spaceborne CAN bus nodes are implemented by non-aerospace-grade devices...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L12/24
Inventor 刘思远申泽庶刘胜利杨芳张晓敏
Owner AEROSPACE DONGFANGHONG SATELLITE
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