As a straightness error separation method,frequency domain method is usually used by assuming that the straightness error meets the periodic condition of Fourier transformation.

Method of error separation based on photoelectric sensor in measurement of cylindricity;

The evolution forms of a multistep method for roundness error separation and their harmonic restraint analysis;

Angle Indexing Error Separation Technique for Prism--Multi-displacement Method;

A technology of dynamic measure round error and error separating;

The part is evaluated using the techniques such as curve matching, curved face matching and error separating.

Comparison of evaluating precision of straightness error between least square method and least envelope zone method;

Design and application for evaluating straightness error software based on VB;

Optoelectronic non contact measuring method for straightness error;

Accurate linear error assessment based on LINGO;

The evaluation process of linear error evaluation base line was analyzed in order to improve the motion precision in dynamically measured rolling linear guide pair, and GA (genetic algorithm) was used to optimize the target line.

The linear error of main crankshaft which is often apt to change in the producing process.

Automatic measuring system of alignment error based on laser collimator technique;

Automatic measuring and evaluating system of alignment error based on PC;

With the combination of the equal thickness interference formed by an air wedge and the CCD image-processing technique,a new method is presented to measure spatial alignment error.