Stable, fast and simple flatness error evaluation method

Abstract

The invention belongs to the field of precision measurement and computer application, and relates to a stable, fast and simple flatness error evaluation method comprising a step 1 of acquiring a measured point set, and establishing a feature row vector set, a boundary element set and a state element set according to the measured point set; a step 2 of taking a measured point corresponding to the minimum value of the state element set as a key point, and adding the serial number of the measured point to the key point set; a step 3 of establishing an analysis matrix and an analysis column vectoraccording to the key point set; a step 4 of performing rank analysis on the analysis matrix and an augmented analysis matrix to determine whether to continue optimizing, eliminate the key point or terminate a program and obtaining an optimal value; a step 5 of solving the analysis matrix and the analysis column vector to obtain an optimizing direction; a step 6 of solving a new key point, updating a measured point set and going to the next loop; and a step 7 of terminating the program and obtaining the optimal value.

Description

technical field [0001] The invention belongs to the field of precision measurement and computer application, and relates to a stable, rapid and simple flatness error evaluation method, which can be used for flatness error evaluation and provides guidance for the improvement of its 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. Flatness error refers to the maximum distance between two parallel planes parallel to the measured plane, as shown in the attached figure 1 shown. At present, the evaluation method of flatness error is a research hotspot in the academic circle, which is mainly divided into the following five types of evaluation methods. [0003] The first category, specialized geometric evaluation methods. Using the geometric properties of paral...

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Problems solved by technology

However, this method is very sensitive to the initial value and cannot always complete the flatness error evaluation task stably

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

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