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Network control method of dual-redundancy CAN bus

A CAN bus and CAN controller technology, applied in the field of avionics and space, can solve problems such as bus driver or controller abnormality, transmission medium bus network influence, etc., to achieve easy programming, ensure system reliability, and improve fault tolerance. Effect

Active Publication Date: 2010-01-20
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

However, unlike ordinary industrial applications, the aerospace field has higher requirements for the reliability of the entire system, and in practical applications, the abnormality of the bus driver or controller, damage to the transmission medium, and environmental interference will cause the entire bus network influences

Method used

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  • Network control method of dual-redundancy CAN bus
  • Network control method of dual-redundancy CAN bus
  • Network control method of dual-redundancy CAN bus

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Embodiment Construction

[0029] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] The application environment of the present invention is a distributed control network based on the CAN bus, and its basic composition is as follows: figure 1 As shown, it includes the master control node and a series of measurement devices and execution devices. Each node is a programmable intelligent node with self-check function. Each device is connected through a dual-redundancy CAN bus, and the nodes adopt figure 2 In the controller redundancy design shown, the single-chip microcomputer (or other microprocessor) controls two CAN controllers simultaneously through different ports and interrupts. The CAN controller supports extended functions such as read / write access error counting, programmable error alarm limit register, and CAN bus error interrupt.

[0031] The network control method of a kind of double redundancy CAN bus of...

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Abstract

The invention provides a network control method of a dual-redundancy CAN bus, which comprises five major steps: step 1: switching on a system and carrying out node initialization; step 2: detecting the initialization of the system; step 3: carrying out normal work and cycle detection; step 4: carrying out treatment of abnormality during the operation of the system; and step 5: carrying out the treatment after switching over a main channel and a standby channel. The method fully utilizes a mature CAN device for constructing a dual-redundancy bus network, carries out error detection and specifies control authorities of different nodes through application software, realizes a network control strategy of distributed monitoring and centralized management, simultaneously provides a detailed fault detection method of the CAN bus system and carries out classification on different errors, thereby being easy to realize programming and having strong universality. The network control method improves the fault-tolerant capacity of the CAN bus system and fully utilizes the redundancy mechanism to ensure the reliability of the system; and the network control method has wide practical value and application prospect in the field of mechanical and electrical control.

Description

1. Technical field: [0001] The invention relates to a network control method of a dual-redundancy CAN (controller local area network) bus, which is used to improve the reliability of CAN bus application in the electromechanical control field, and belongs to the field of avionics and space technology. 2. Background technology: [0002] Considering the transmission rate, reliability, application cost and other factors, the mature CAN bus technology has gradually been recognized in the design of aircraft, especially in the application of UAVs. The basic CAN protocol adopts error detection measures such as short frame format, non-destructive bit arbitration technology, CRC (cyclic redundancy check) check and intra-frame response, which greatly guarantees the correctness and reliability of message transmission. However, unlike ordinary industrial applications, the aerospace field has higher requirements for the reliability of the entire system, and in practical applications, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L12/24H04L1/22
Inventor 祝明姜光泰郑泽伟吕明云
Owner BEIHANG UNIV
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