A method of full-time hot backup of control system based on data synchronization
A control system and data synchronization technology, applied in the field of control, can solve the problems of equipment function failure, long switching time, and difficult implementation, etc., and achieve the effect of simple implementation, easy maintenance, and flexible use
Active Publication Date: 2021-12-28
NAVAL UNIV OF ENG PLA
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Problems solved by technology
[0005] There are problems: the switching criterion is incomplete, and the failure of the "heartbeat" signal between the master and the slave is not equivalent to the failure of the device function
[0008] Existing problems: technical design is complicated, implementation is difficult, switching takes a long time, and hot backup cannot be realized
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[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0049] The invention provides a data synchronization-based full-time domain redundant hot backup method for a control system. The method adopts the technical scheme of "hardware configuration dual-machine, software switching master-slave", and includes two master-slave switching mechanisms of arbitration and voting.
[0050] Such as figure 1 As shown, a redundant control system constructed according to the guidance of the present invention is shown, which adopts the popular three-level control architecture in the current industrial system---top-level logic control, middle-level real-time control and bottom-level execution control. The top-level logic control is mainly realized by process control equipment A and process control equ...
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The technical solution adopted in the present invention is: a full-time hot standby method for a control system based on data synchronization: the control system includes a control device A and a control device B that communicate with each other, and the control device A and the control device B communicate with the interface device respectively Use the same method to connect and perform interactive communication, and the communication content is the same; the interface device includes multiple; it also includes a health monitoring device, and the health monitoring device is used to receive the operating status information sent by the control device A and control device B and the interface device , and set the master-slave state of control device A and control device B according to the operating state information, one of the control devices is in the master state, and the other control device is in the slave state; the interface device only processes the information sent by the control device in the master state data pack. The invention effectively improves industrial reliability.
Description
technical field [0001] The invention belongs to the technical field of control, and in particular relates to a data synchronization-based full-time hot backup method for a control system. Background technique [0002] The coupling of information flow and energy flow in complex industrial systems is becoming increasingly tight. Once the control system fails, it will lead to task failure at least, and equipment damage or even casualties at worst. Therefore, it is necessary to improve the control reliability. Controller redundancy is a method with less cost, better comprehensive performance, and widely used at present. Through the master-slave configuration, the redundancy of the control system is realized. According to the different master-slave switching methods, this method can be divided into two categories: [0003] (1) Master-slave switching is completed through the "heartbeat" signal [0004] The main idea: the master-slave sends a "heartbeat" signal at a certain time...
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IPC IPC(8): G05B9/03
CPCG05B9/03
Inventor 郭威崔小鹏刘勇李鹏飞欧阳斌廖涛李传振熊又星于嘉维陈杨科
Owner NAVAL UNIV OF ENG PLA