GB/Z 26958.30-2017

This standard defines the basic concepts and terminology for robust profile filters used in surface texture analysis, specifically designed to handle outliers, spikes, and irregular features in measurement data. It is applied in precision engineering and manufacturing quality control, where GPS filtration is required to separate roughness, waviness, and form components from measured profiles without distortion from non-ideal surface characteristics. The standard ensures consistent application of robust filtering methods across coordinate measuring machines, profilometers, and other surface metrology instruments.