Four-redundancy signal monitoring method and device

Abstract

Provided are a four-redundancy signal monitoring method and device. The method includes: setting three monitoring thresholds for four-redundancy signal monitoring, namely, a return gate L1 with a minimum threshold value, a storage gate L2 with an intermediate threshold value, and a fault gate L3 with a maximum threshold value; When the absolute value of the difference between one of the signals and the voting value of the redundancy signal is greater than the fault gate L3 and continuously exceeds the first predetermined time, it is determined that the signal is permanently faulty and the use is abandoned; when the absolute value of the difference between one of the signals and the voting value of the four redundancy signals When the absolute value of the difference between the determined abnormal signal and the voting value returns to the return gate L1 and continues for more than the third predetermined time, it is determined again Signal is normal. The monitoring method realizes the initial diagnosis and confirmation process of redundant signal faults, reduces false alarms and false alarms in fault diagnosis, ensures the accuracy of high-redundant signal acquisition, and slows down the speed of fault degradation of redundant signals.

Description

technical field [0001] The present disclosure relates to fault monitoring of a fly-by-wire flight control system, in particular to a three-door method and device for four-redundancy signal fault monitoring. Background technique [0002] The application of fly-by-wire flight control system provides an opportunity to optimize aircraft performance and reduce the burden on pilots, but it also brings certain risks. For example, a failure of the flight control computer or sensors in the fly-by-wire flight control system would immediately render the aircraft uncontrollable. In order to solve this problem, redundant fault-tolerant architecture is generally adopted in the design of fly-by-wire flight control system. That is, there is a margin in the configuration from the flight control computer, sensors to actuators. [0003] Redundancy management technology is the key to fly-by-wire flight control system design. Its purpose is to improve the safety and reliability of the fly-by-...

AI Technical Summary

Problems solved by technology

Therefore, the strategy of changing the threshold cannot solve the contradiction between choosing a large and small monitoring threshold, and because the variable threshold makes the monitoring threshold wider, it also introduces the problem of common thresholds.

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