CPU three-redundancy voting circuit applied to aviation electric heating control system

Abstract

The invention relates to a three-redundancy voting circuit applied to an aviation electric heating control system, and the voting circuit comprises a processor circuit which enables an output signal of the voting circuit and output signals of the other two voting circuits to be transmitted to a logic processing circuit. A position identification circuit transmits the position state to the logic processing circuit; the handshake signal circuit of each group of circuits outputs a handshake signal to the other two groups of voting circuits respectively; the logic processing circuit receives a signal of the position identification circuit and receives the handshake signals of the other two groups of voting circuits, outputs the handshake signals, receives the output signals and the working state signals sent by the processor, judges the working state, votes the output of the three circuit processors, and outputs according to the voting result by adopting a two-out-of-three voting mechanism. A fault circuit in the three circuits is invented, so that the defect of error switching of a dual-redundancy system is avoided, and the product reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of digital integrated circuit IP core, and more specifically relates to an IP core ultra-long path combinable certification system. Background technique [0002] With the development trend of more electric aircraft, the application of electric heating control system on board is increasing. The redundancy design of conventional aviation electric heating control system usually adopts automatic mode and manual mode. Dual-redundancy control strategy, there are two processor modules, one of which is working at the same time, and the other is backup. The two processor modules are cross-linked through communication and hard-wired signals. When the working processor module fails, the faulty processor module The module switches to the backup processor module. The key to the dual processor module is correct switching. Since the failure modes of the processor module cannot be detected by the processor module and anothe...

AI Technical Summary

Problems solved by technology

[0002] With the development trend of more electric aircraft, the application of electric heating control system on board is increasing. The redundancy design of conventional aviation electric heating control system usually adopts automatic mode and manual mode. Dual-redundancy control strategy, there are two processor modules, one of which is working at the same time, and the other is backup. The two processor modules are cross-linked through communication and hard-wired signals. When the working processor module fails, the faulty processor module The module switches to the backup processor module. The key to the dual processor module is correct switching. Since the failure modes of the processor module cannot be detected by the processor module and another processor module, and when a processor module When a fault occurs, the status information of another processor module may be misjudged. All of the above will lead to frequent mis-switching of dual CPUs, resulting in abnormal operation of the entire product and reducing product reliability.

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