In order to explore the multidisciplinary design optimization strategy of centrifugal compressor and improve the optimization efficiency,an optimization system was development based on Proper Orthogonal Decomposition. Firstly,initial samples were selected to format the snapshot matrix. By retaining only the most significant components after POD analysis,a reduced order model of design space was constructed,in which the POD coefficients were acted as the new shape design variables. The method significantly r...