A domain adaptation method based on interpolation and centroid representation for open-set fault diagnosis of bearing

•This paper proposes a DAMICR method for bearing fault diagnosis under OSDA scenarios where the target domain may contain previously unknown fault categories.•The proposed method utilizes interpolation mechanism and centroid representation to identify known categories and unknown categories.•The interpolation mechanism can effectively reduce the influence of spurious correlations between label and domain.•The experimental datasets of bearing show the validity and superiority of the proposed method.