A Fast, Stable and Simple Evaluation Method of Cylindricity Error

Abstract

The invention belongs to the precision metering and computer application field, and relates to a quick, stable and simple-mode cylindricity error evaluation method. The quick, stable and simple-mode cylindricity error evaluation method includes the following steps: 1) acquiring a testing point set, according to the testing point set, establishing a characteristic row vector set, a boundary elementset and a state element set; 2) taking the testing point corresponding to the minimum of the state element set as the key point, and adding the sequence number of the key point into a key point set;3) according to the key point set, establishing an analysis matrix and an analysis row vector; 4) performing sequence analysis on the analysis matrix and an augmentation analysis matrix so as to determine whether to continue searching optimization, to reject the key point or to terminate the program to obtain the optimal value; 5) solving the analysis matrix and the analysis row vector to obtain the optimization searching direction; 6) tracing the problem to solve a new key point, updating a testing point state set, and entering the next time of circulation; and 7) terminating the program andobtaining the optimal value.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a stable, fast and simple cylindricity error evaluation method, which can be used for the evaluation of cylindricity error of parts with revolving body structure, and improves its processing technology Provide guidance. Background technique [0002] Dimensional error and shape error (abbreviation of shape error and position error) directly affect product quality, assembly and service life. It is of great significance to quickly and accurately calculate part error. The definition and discrimination method of cylindricity error are given in the national standard and ISO standard, but the method of calculating the cylindricity error value from the measurement data is not given. At present, the evaluation method of cylindricity error is a research hotspot in the academic circle, which is mainly divided into the following five types of evaluation methods. ...

AI Technical Summary

Problems solved by technology

However, this method is very sensitive to the initial value and is not always stable for the task of cylindricity error evaluation

[0008] To sum up, there is still a lack of a stable, fast and simple form of cylindricity error evaluation method

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