Wind tunnel test balance assessment method based on strain signal approximate entropies
A technology of wind tunnel test and approximate entropy, which is applied in the field of calibration and evaluation of aerospace vehicle wind tunnel test balance, can solve the problems of long calibration period, many steps, difficult to determine the accuracy and reliability of mechanical data, etc., and achieve reliable Evaluation, the effect of accurate mechanical data and reliable test data
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[0041] figure 1 Shown, a kind of embodiment of the present invention is, a kind of evaluation method based on the wind tunnel test balance of strain signal approximate entropy, its steps are as follows:
[0042] A, before the test, install model three-way strain gauge 1a, frame three-way strain gauge 2a and balance three-way strain gauge 3a respectively on the top inner wall of aircraft model 1, model frame 2 and balance 3, model three-way strain gauge 1a, The signal output ends of the frame three-way strain gauge 2a and the balance three-way strain gauge 3a are connected to the signal conditioning instrument; the signal conditioning instrument is also connected to the computer through the data acquisition device;
[0043] B, simulate actual working conditions, carry out wind tunnel test to aircraft model; Test simultaneously, model three-way strain gauge 1a, frame three-way strain gauge 2a and balance three-way strain gauge 3a measure respectively the strain signal f pv (t) ...
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