Stable, quick, and simple-mode method for evaluating minimum circumscribed cylinder diameter

Abstract

The invention, which belongs to the field of precision metering and computer application, relates to a stable, quick, and simple-mode method for evaluating a minimum circumscribed cylinder diameter. The method comprises: step one, a set of measuring points is obtained and a feature line vector set, a boundary element set and a state element set are established based on the set of measuring points;step two, a measuring point corresponding to a maximum value of the state element set is selected as a key point and a measuring point serial number of the measuring point is added into a key point set; step three, according to the key point set, an analysis matrix and an analysis column vector are established; step four, a rank analysis is carried out on the analysis matrix and an augmentation analysis matrix to determine whether to carry out optimizing continuously, reject the key point or terminate the program, and an optimal value is obtained; step five, the analysis matrix and the analysis column vector are calculated to obtain an optimizing direction; step six, a problem is solved, a new key point is calculated, a measuring point state set is updated, and next circulation is carriedout; and step seven, the program is terminated and an optimal value is obtained.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a stable, rapid and simple method for assessing the diameter of a minimum circumscribed cylinder, which can be used for the assessment of the minimum diameter of a circumscribed cylinder of parts with a structure of a revolving body, and for its Provide guidance for the improvement of processing technology. 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 identification method of the minimum circumscribed cylinder diameter are given in the national standard and ISO standard, but the method of calculating the minimum circumscribed cylinder diameter value from the measurement data is not given. At present, the evaluation method of the mini...

AI Technical Summary

Problems solved by technology

However, this method is very sensitive to the initial value and cannot always complete the task of evaluating the minimum circumscribed cylinder diameter stably

[0008] In summary, there is still a lack of a stable, fast, and simple method for evaluating the diameter of the smallest circumscribed cylinder

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