长导轨方位角积分修正与横偏轨迹重构补偿方法OA

Conventional static,segmented measurement methods suffer from splicing errors and data drift on ultra-long guide rails,making one-shot dynamic continuous measurement infeasible.To address this issue,an error-compensation method based on azimuth-angle integration correction and lateral-offset trajectory reconstruction is proposed.First,azimuth-angle signals throughout forward and reverse traversals are acquired by a high-precision gyroscope.Second,attack-angle and sideslip-angle disturbances are separated by a continuous-integration calibration strategy,directly yielding a continuous,unspliced lateral-offset trajectory.Third,the lateral-offset curve is subjected to a fast Fourier transform,and,based on the root-mean-square error criterion,low-order harmonics with large amplitudes and high error-reduction contributions are adaptively selected.Finally,the trajectory is reconstructed using the selected sensitive harmonic components to obtain the compensated offset.Repeated experiments at speeds of 0.1～0.9m/s show that the maximum difference between forward and reverse lateral offsets is reduced by an average of 63.3%.Straightness measurements of a 75 m guide rail are found to be(0.446 2±0.002 8)mm(horizontal)and(0.438 2±0.002 5)mm(vertical),outperforming traditional autocollimator and laser-interferometry methods.These results demonstrate that high precision and high repeatability are offered by the proposed approach,providing a new technical pathway for straightness measurement of ultra-long guide rails.