Correction of step response curve in wind tunnel test

Dynamic matrix control has been proved to be an effective wind tunnel control method. However, the estimation may be biased if the step response curve between input and output is unknown, which leads to the reducing of control effect. In this paper, the estimated step response curve is corrected using area method by the data measured from the wind tunnel test. First, the step response curve is transformed into a discrete transfer function model by using area method. By comparing the response curves under different operating conditions, the conclusion is obtained that there is only one gain difference between the curves. Based on this, the model of the condition without the response curve is parameterized by unknown gains. And then least square method is used to estimate the unknown gain so that the correction of the response curve is realized. The effectiveness of the proposed method is verified by real wind tunnel test results.