Anti-interlock circuit and redundant fault-tolerant system to prevent channel locking of fault-tolerant system

Abstract

The invention discloses an anti-interlock circuit and a redundancy fault-tolerant system for preventing channel locking of the fault-tolerant system. The anti-interlock circuit includes: a monitoring result judgment sub-circuit, a delay sub-circuit, and an anti-noise sub-circuit. In the circuit design, the effective signal of the power supply is processed in three layers: judgment, delay, and anti-noise; in the judgment part, the monitoring result is judged by the comparison circuit; in the delay part, the purpose of signal delay is achieved by charging the capacitor, and other The impact of the channel on this channel; in the anti-noise part, through the design of the hysteresis circuit, the noise interference is suppressed, the false flip caused by the level jitter is effectively prevented, and the final processed signal is introduced into the channel fault logic, so that the system can correctly obtain each The working status of the channel, in order to switch and close the channel. It solves the phenomenon of inter-channel locking caused by asynchrony between various channels and differences in power supply characteristics in the existing fault-tolerant system.

Description

technical field [0001] The invention relates to but is not limited to the technical field of fault-tolerant system airborne computer design, and relates to an anti-interlock circuit and a redundant fault-tolerant system with high reliability and high stability to prevent channel locking of the fault-tolerant system. Background technique [0002] Fault-tolerant system, as the key technology of airborne computer reliability design, has been widely used in aerospace field. In the redundancy fault-tolerant system design, each redundancy, that is, each channel has independent communication capabilities, and the system manages the status of each channel according to different control strategies. The purpose of introducing a monitoring circuit is to locate, isolate and switch channels after a fault is found. [0003] In practical applications, it is found that due to the asynchrony between channels and differences in power supply characteristics, when the signal monitored by one o...

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Problems solved by technology

[0005] The embodiment of the present invention provides an anti-interlock circuit and a redundant fault-tolerant system to prevent channel locking of the fault-tolerant system, so as to solve the problems caused by the out-of-synchronization between channels and the difference in power supply characteristics in the existing fault-tolerant system. lock-up phenomenon

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