Anti-interlocking circuit for preventing fault-tolerant system channel from being locked and redundancy fault-tolerant system

Abstract

The invention discloses an anti-interlocking circuit for preventing a fault-tolerant system channel from being locked and a redundancy fault-tolerant system. The anti-interlocking circuit comprises amonitoring result judgment sub-circuit, a delay sub-circuit and an anti-noise sub-circuit. Three-layer processing of judgment, time delay and noise resistance is carried out on effective signals of the power supply in the aspect of circuit design; in the judgment part, the monitoring result is judged through a comparison circuit; in the time delay part, the purpose of signal delay is achieved by charging a capacitor, and the influence of other channels on the channel is eliminated; in the anti-noise part, through the design of a hysteresis circuit, noise interference is suppressed, false overturn caused by level jitter is effectively prevented, and finally processed signals are introduced into channel fault logic, so that the system can correctly obtain the working state of each channel soas to switch and close the channels. The problem that in an existing fault-tolerant system, channels are deadly locked due to desynchrony among the channels, power supply characteristic difference and the like is solved.

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...

AI Technical Summary

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

Images