A look-up table triple redundant signal processing method

Abstract

The invention belongs to the field of signal processing, and specifically discloses a look-up-type three-redundancy signal processing method, which includes the following steps: (1) measuring the three-way redundant channel V x1 , V x2 or V x3 (2) Calculate the difference ΔV between two pairs of three redundant signals x12 , ΔV x23 , ΔV x13 ; (3) Query the triple redundant signal lookup table: (3.1) Judgment ΔV x12 , ΔV x23 , ΔV x13 and the relationship between the fault judgment threshold value Δ, and check the table above: when ΔV x12 , ΔV x23 , ΔV x13 When it is less than or equal to Δ, the global variable K=0, indicating that the three channels are normal, and one channel is selected as the current three-redundant signal processing result; (3.2) When the global variable K is not equal to 0, continue to judge ΔV x12 , ΔV x23 , ΔV x13 The relationship with Δ, and look up the above table to get the result of triple redundant signal processing. This method can minimize the pulsation of triple redundant signal processing results.

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...

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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

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