Based on the acceleration signal evaluation method of wind tunnel tests on approximate entropy balance

An evaluation method of an acceleration signal approximation entropy-based wind tunnel balance, which is primarily the, models are mounted, a frame, an acceleration sensor in the three scales on top of the inner wall of the aircraft model, model framework and the balance, the three sensors detect the acceleration signals for each Fourier transform spectrum signals, and then calculate the approximate entropy value within 0 ~ 300Hz six frequency bands, respectively, and then calculating the difference model, with the frame to approximate entropy value of the acceleration signal, and the difference between the model and the balance with the approximate entropy value of the acceleration signal; when both the difference of these two accelerations to approximate entropy value within a predetermined range, the evaluation result of the determination trusted balance test data, or determined not credible. By mechanical balance measured data to accurately model wind tunnel test time so as to ensure reliable; to provide more accurate and reliable test data for aerospace vehicles.