Method for comprehensively evaluating key parameter errors of complicated mechanical systems

A technology of key parameters and mechanical systems, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as error evaluation of key parameters of complex mechanical systems

Inactive Publication Date: 2018-05-08
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a comprehensive evaluation method for key paramet

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  • Method for comprehensively evaluating key parameter errors of complicated mechanical systems
  • Method for comprehensively evaluating key parameter errors of complicated mechanical systems
  • Method for comprehensively evaluating key parameter errors of complicated mechanical systems

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[0023] In order to illustrate the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0024] combine figure 1 , a complex mechanical system key parameter error comprehensive evaluation method of the present invention, comprising the following steps:

[0025] Step 1. Construct the key parameter error evaluation index system of the complex mechanical system based on AHP: By analyzing the influencing factors of the evaluation, useless parameters are eliminated, and then the key parameter hierarchical structure error evaluation system of the complex mechanical system is constructed based on the idea of ​​AHP. details as follows:

[0026] Step 1.1, clear assessment needs:

[0027] Analyze the performance characteristics of the complex mechanical system, combine the key parameters and their errors for system accuracy, and analyze the factors...

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Abstract

The invention discloses a method for comprehensively evaluating key parameter errors of complicated mechanical systems. The method includes rejecting useless parameters by means of analyzing evaluation influence factors, and then constructing systems for evaluating the key parameter hierarchical structure errors of the complicated mechanical systems on the basis of the idea of AHP (analytic hierarchy processes); converting sorting computation on evaluation indexes into pairwise comparison on the evaluation indexes by the aid of characteristic vector processes on the basis of improved Delphi processes, measuring the importance of the various evaluation indexes by the aid of scales, computing pairwise ratios and constructing judgment matrixes; allocating weights of indexes for comprehensively evaluating key parameters and then comprehensively evaluating and analyzing the key parameters by the aid of power exponent comprehensive evaluation processes; acquiring influence of parameters of bottom layers on parameters of each upper layer according to power exponent evaluation models and ultimately acquiring influence of the key parameters on the precision of the complicated mechanical systems by parity of reasoning. Vectors corresponding to characteristic values of the judgment matrixes are relative weight number sorting relation vectors of the evaluation indexes. The method has the advantage that the influence degrees of input parameters on the precision of the complicated mechanical systems can be effectively analyzed by the aid of the method.

Description

technical field [0001] The invention belongs to the field of mechanical design, and in particular relates to a comprehensive evaluation method for key parameter errors of complex mechanical systems. Background technique [0002] The accuracy of complex mechanical systems has always been the focus of attention of designers, and the degree of influence of numerous input parameters on the accuracy of complex mechanical systems is one of the difficulties in research. Therefore, it is an urgent problem to efficiently and accurately evaluate the impact of input parameter errors on the accuracy of complex mechanical systems. [0003] Analytical Hierarchy Process (AHP) is a systematic and hierarchical analysis method that combines qualitative and quantitative analysis. Delphi (Delphi) method is essentially an anonymous feedback correspondence inquiry, which has the characteristics of anonymity, feedback and statistics. There are many deficiencies in the traditional Delphi method o...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 钱林方尹强刘太素陈龙淼徐亚栋羊柳
Owner NANJING UNIV OF SCI & TECH
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