Abstract:
A priori-embedded design of experiment and reconstruction frame is proposed for the pressure measurement of flight vehicle in the wind tunnel pressure test. An design of experiment method integrating prior information is put forward to quantitatively transfer the prior to pressure design sites. It contains feature extraction method of prior pressure distribution, clustering process of multiple cases, and the optimization of triangular panel uniformity of the initial design. In order to model the difference among the local pressure distributions, a reconstruction method based on POD, which balances the number of base modal and design sites, is proposed. Test on a typical high-speed plane shows that the mean reconstruction error is less than 0.2% and the root mean square error is less than 4%, while the maximum error is less than 30%. Reconstruction performance under multiple cases behave similar, which is meaningful for the lift curve slope. With priori-embedded design, the maximum error could be further imporved with a decrease of 0-10%. Input of this frame contains numerical results and few empirical parameters, which is suitable for pressure measurement tests of flight vehicles with complex configuration.