Table look-up three-redundant-signal processing method

Abstract

The invention belongs to the field of signal processing and particularly discloses a table look-up three-redundant-signal processing method. The method comprises the following steps: (1) measuring values of three redundant channels Vx1, Vx2 and Vx3; (2) calculating difference values delta Vx12, delta Vx23 and delta Vx13 between every two of three redundant signals; and (3) looking up a three-redundant-signal look-up table. The third step includes two sub steps: (3.1) judging the relationship between delta Vx12 and a fault judging threshold delta, between delta Vx23 and the fault judging threshold delta and between delta Vx13 and the fault judging threshold delta and looking up the above table, wherein, when delta Vx12, delta Vx23 and delta Vx13 are smaller than or equal to delta, a global variable K is equal to 0, which suggests that the three channels are normal, and any of the channels is taken as the current three-redundant-signal processing result; and (3.2) continuing judging the relationship between delta Vx12 and delta, between delta Vx23 and delta and between delta Vx13 and delta when the global variable K is not equal to 0 and looking up the above table to obtain a three-redundant-signal processing result. The method can enable the pulse of a three-redundant-signal processing result to be minimized.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a table look-up type triple-redundancy signal processing method. Background technique [0002] At present, the reliability requirements of my country's aerospace vehicles are getting higher and higher, and correspondingly, the reliability requirements of each component are also increasing. Especially, the reliability of the servo mechanism controlled by the aerospace vehicle as the most basic layer of the entire system is even more important. up. Redundancy design is generally an effective means to improve the reliability of servo mechanisms, especially triple-redundant configurations are used more and more frequently, which brings about the problem of triple-redundant signal processing methods. The commonly used three-redundant signal processing method is the majority voting method, that is, find the two closest signals among the three signals, and take their average...

AI Technical Summary

Problems solved by technology

However, usually the signals are continuously changing, and the three redundant signals are often interleaved and pass through each other. If the majority voting method is adopted, the voting result must be constantly switched between the three redundant signals, so even if the signals are all normal There will also be large-scale, multi-frequency pulsations, which are often brought into the processing results as a disturbance

Images