Dual redundant fault-tolerant system based on embedded type CPU,

Abstract

The invention discloses a dual redundant fault-tolerant system based on embedded type CPU, comprising a basal plate, a first CPU module, a second CPU module, a first output switching module, a second output switching module and a communication module, wherein the first CPU module, the second CPU module, the first output switching module, the second output switching module and the communication module are arranged on the basal plate and communicate with an upper computer through the communication module; and the first CPU module and the second CPU module complete the data acquisition of a sensor and then carry out data processing and operation and finally output a result through the first output switching module or the second output switching module to drive an execution module to work. The invention solves the problem of the single-point fault of the traditional dual redundant fault-tolerant system and can still keep the system in a normal working state by switching the system to redundant backup equipment when the system is in a fault mode; in addition, the dual engine redundant fault-tolerant system has the advantages of simple method, high general reliability, structure simplification of selected parts and high cost performance.

Description

technical field [0001] The invention relates to a dual-machine redundant fault-tolerant system applied in the field of automatic control, in particular to a dual-machine redundant fault-tolerant system based on an embedded CPU. Background technique [0002] The dual-machine redundant system based on the embedded CPU has many applications in the industrial field. A large number of examples in the aerospace, power supply and distribution, and telecommunications industries show that the dual-machine redundant system in the environment with high reliability requirements generally passes through A single arbitration switch module selects the output. [0003] At present, the dual-machine redundant system based on embedded CPU is only redundantly designed for the CPU, and the arbitration switching circuit and the output module are not designed redundantly. If these parts fail, the system will have no redundant backup. When these faults cannot be performed When repairing, the syste...

AI Technical Summary

Problems solved by technology

[0003] At present, the dual-machine redundant system based on embedded CPU is only redundantly designed for the CPU, and the arbitration switching circuit and the output module are not designed redundantly. If these parts fail, the system will have no redundant backup. When these faults cannot be performed When repairing, the system will output an error and cause a fault, which will cause the system to fail to operate normally

The main disadvantage of the traditional dual-machine redundant fault-tolerant system is that there is a single point of failure in the system, which causes system failure, and the overall reliability of the system is not high.

Since the arbitration switching circuit and the output module do not adopt a redundant structure, failure of these parts will cause an unrecoverable failure of the entire system

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