“…The acceleration signal generated by the machine tools' straightness error in the Y direction of the X-axis was measured. The data fusion algorithm was used to extract the high, medium and low speed test signals and extract the space [0.0025, 0.01], [0.01, 0.1], [0.1, 2] bands, respectively; according to the test speed, the corresponding time and frequency were calculated as [0.8, 3.2], [1.6, 16], [8,160], respectively. The algorithm that has been proposed in this paper was used to fuse and remove the error of the integral trend term, and finally the corresponding straightness error curve was calculated.…”