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A real-time redundant communication system based on RS422 and CAN bus heterogeneity

A CAN bus, RS422 technology, applied in the field of real-time redundant communication devices, can solve problems such as communication failure, system paralysis, hardware reliability impact, etc., and achieve the effects of avoiding data conflict, improving reliability, and high reliability

Inactive Publication Date: 2019-05-07
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) There is only one bus for communication, and there is a single-point link. Once a software communication failure occurs and cannot be recovered, communication failure will occur, which will affect system reliability.
[0005] (2) It does not have self-diagnosis and self-recovery functions, that is, when a communication node fails to communicate, there is no remedial measure, resulting in system failure
[0006] (3) Affected by the reliability of the hardware for communication, when there is a hardware or transmission line failure, it will cause communication failure and system paralysis

Method used

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  • A real-time redundant communication system based on RS422 and CAN bus heterogeneity
  • A real-time redundant communication system based on RS422 and CAN bus heterogeneity
  • A real-time redundant communication system based on RS422 and CAN bus heterogeneity

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing and embodiment the present invention is further introduced:

[0036] A heterogeneous real-time redundant communication system based on RS422 and CAN bus, including intelligent single machine I and intelligent single machine II, wherein the intelligent single machine I includes an RS422 interface and a CAN interface, and the intelligent single machine II includes an RS422 interface and a CAN interface; an RS422 bus is provided between the two RS422 interfaces, and a CAN bus is provided between the two CAN interfaces.

[0037] Combining RS422 effective data into message frames, each frame of data includes frame header, frame length, frame identifier, data area, checksum and frame tail, where the frame header and frame tail are fixed bytes, and the frame length indicates that it needs to be sent The total length of valid data.

[0038] The RS422 bus frame format convention is:

[0039] Signal name: frame header; byte count: ...

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PUM

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Abstract

The invention belongs to the technical field of dual-redundancy servo control systems, andparticularly relates to a real-time redundant communication system based on RS422 and CAN bus heterogeneity, which is used for communication of different intelligent single machines of a servo system for rocket flight control, realizes high-reliability communication with relatively low cost, has self-diagnosis and self-recovery functions, and ensures high reliability of flight control systems such as a rocket. The system comprises an intelligent single machine I and an intelligent single machine II, the intelligent single machine I comprises an RS422 interface and a CAN interface, and the intelligent single machine II comprises an RS422 interface and a CAN interface; An RS422 bus is arranged between the two RS422 interfaces, and a CAN bus is arranged between the two CAN interfaces; And combining the effective data of the RS422 into a message frame, each frame of data comprising a frame header, a frame length, a frame identifier, a data area, a check and a frame tail, the frame header and the frame tail being fixed byte bytes, and the frame length representing the total length of the effectivedata needing to be sent.

Description

technical field [0001] The invention belongs to the technical field of dual redundant servo control systems, in particular to a heterogeneous real-time redundant communication device based on RS422 and CAN bus. Background technique [0002] To complete complex motion control in a large-scale servo system, multiple intelligent stand-alone machines are required to coordinate their work, while the higher-level system requires a unique node and interface for the servo system, corresponding to a 1553B bus site. It is against this background that the present invention adopts the internal design of the servo system to design a highly reliable redundant communication network to solve the distributed control requirements. Specifically, it is a communication system implemented by RS422 bus and CAN bus, which is used in the servo system. The communication of different intelligent single machines is a communication system with low cost, high reliability, self-diagnosis and self-recovery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40
Inventor 王效亮曾宪科栾婷张成浩张华张建国
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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