An improved OPAX method based on moving multi-band model

Abstract

Abstract In this paper, a transfer path analysis (TPA) method – OPAX is further improved. The new method uses multiple estimates of the dynamic mount stiffness in the multi-band OPAX method to increase the estimation accuracy. A moving multi-band model is used to establish the parametric load model. Two statistical metrics are introduced to evaluate the estimation uncertainty, and a strategy for iteratively calculating operational forces whilst quantitatively assessing estimation accuracy is proposed by combining the two metrics. A numerical case is used to illustrate the proposed method. The results show that this method not only produces better estimation than the multi-band model method, but also evaluates estimation accuracy quantitatively by itself. Then the proposed method is investigated and demonstrated by a vehicle example and a rule of thumb is formulated. Lastly, a test campaign is carried out on a full vehicle to validate the proposed method.