Method for evaluating state of hydraulic machine based on multilayer fuzzy matching algorithm

Abstract

The invention discloses a method for evaluating a state of a hydraulic machine based on a multilayer fuzzy matching algorithm, which comprises three steps of information comparison, information fusion and judgment conclusion. The step of the information comparison is used for providing a similarity table of real-time data; the step of the information fusion is used for endowing weights for each signal based on the similarity table of the real-time data and comprehensively calculating and giving an analog quantity comprehensive index, a digital quantity index and a hydraulic machine overall condition index; and the step of the judgment conclusion is used for providing a method for establishing a system expert library of the state of the hydraulic machine, finding out the state of the highest similarity based on the similarity table of the real-time data and giving a similarity value. The invention can effectively solve the problem of highly nonlinearity of a model of the state of the hydraulic machine, and can flexibly complete the evaluation of the state of the hydraulic machine under the different use conditions and the health conditions of the hydraulic machine.

Description

technical field [0001] The invention belongs to hydraulic machine state judging technology, in particular to a hydraulic machine state evaluation method based on a multi-layer fuzzy matching algorithm. Background technique [0002] Traditional monitoring and diagnosis algorithms generally use the scheme of simple comparison between sampling state information and theoretical information. This scheme is more effective for monitoring and diagnosing digital state information of hydraulic presses, but it has relatively large defects in the measurement of analog information. Without a large amount of analog information, such as pressure, flow, speed, etc., a more effective algorithm must be used to unify analog information monitoring and digital monitoring as an indicator for monitoring the overall condition of the hydraulic machine. Contents of the invention [0003] The purpose of the present invention is to provide a method for evaluating the state of a hydraulic press based ...

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Problems solved by technology

[0002] Traditional monitoring and diagnosis algorithms generally use the scheme of simple comparison between sampling state information and theoretical information. This scheme is more effective for monitoring and diagnosing digital state information of hydraulic presses, but it has relatively large defects in the measurement of analog information. Without a large amount of analog information, such as pressure, flow, speed, etc., a more effective algorithm must be used to unify the monitoring of analog information and digital monitoring, as an indicator for monitoring the overall condition of the hydraulic machine

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