Distributed system control structure with failure protection function, and failure protection method
A distributed system, failure protection technology, applied in the direction of electrical program control, comprehensive factory control, etc., can solve problems such as non-recovery, and achieve the effect of increasing reliability and safety
Inactive Publication Date: 2012-10-10
HARBIN ENG UNIV
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[0003] Existing distributed system control structures such as figure 1 As shown, the reliability of the structure for communication or management depends on the structure of the distributed system control itself, and when the system is interrupted in communication or management, it cannot be recovered
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[0015] Below in conjunction with accompanying drawing, the present invention will be further described:
[0016] combine figure 2 , the control structure of the distributed system with fail-safe is divided into 3 layers: the first layer has 1 master control machine, the second layer has n slave machines, and the third layer has m control units under the control of each slave machine . For the second layer, slave 1 to slave n are sequentially connected, and in the third layer, the m control units under the control of each slave are connected sequentially, and the control units under the control of different control slaves are not connected.
[0017] Detect communication or management failures. When the upper node sends a control command to a node in the lower layer, the command will be sent to all lower nodes controlled by the upper layer node. After the lower node receives the command, if it is a control command for itself, it will execute the control command and return a ...
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The invention provides a distributed system control structure with a failure protection function, and a failure protection method. The method comprises the following steps of: performing failure protection on the original connection in the distributed system, starting from a second layer of the distributed system, and performing connection between neighboring nodes at the same layer; during a process of communication between upper and lower layers or management, massively transmitting a control command to the lower layer nodes connected with an upper layer node by the upper layer node, and detecting whether the communication or the management is failed according to information returned back by the lower layer nodes; and if the communication or the management is failed, performing control by the neighboring lower layer nodes to recover the failed communication or the failed management. The method provided by the invention is suitable for occasions with high requirements on safety and reliability, and especially, suitable for the systems, such as a fire alarm system, and a mine safety system.
Description
technical field [0001] The invention relates to the field of distributed system control, and also relates to a distributed system control failure protection method. Background technique [0002] The application of distributed system control is very extensive, so the reliability and security of distributed system control are particularly important. At present, the reliability of distributed system control mainly comes from the fault-tolerant mechanism of its structure itself, that is, if the global communication or management is interrupted, the local station can still maintain work, but it cannot resume the interrupted communication or management. Therefore, an effective protection method is needed, so that the communication or control controlled by the distributed system can be effectively protected after failure, even if the communication and control are still valid. [0003] Existing distributed system control structures such as figure 1 As shown, the reliability of the...
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IPC IPC(8): G05B19/418
Inventor 冯丽媛姚绪梁金鸿章曹然
Owner HARBIN ENG UNIV