Microphone array optimum design method for closed wind channel aerodynamic noise measurement
A microphone array, aerodynamic noise technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., to achieve the effect of reducing the impact
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[0025] Modeling an array optimization problem:
[0026] min(R(x i )), (x i ∈Ω, MSL(x i )≤SNR,|x i -x g |≥d)
[0027] in:
[0028] R(x i ) is the resolution performance function, which is the objective function;
[0029] x i (i=1, M) is the coordinate of the array unit, and M is the number of the array unit;
[0030] x i ∈Ω is the constraint condition, Ω is the area determined by the installation space of the array in the wind tunnel, and the array
[0031] The unit coordinates must not exceed the area Ω;
[0032] |x i -x g |≥d is the constraint condition, g=1, M and g≠i, the minimum distance between two adjacent units
[0033] Not less than the specified value d;
[0034] MSL(x i )≤SNR is the constraint condition, MSL(x i ) is the array sidelobe suppression level function,
[0035] Better than the specified value SNR.
[0036] Such as figure 1 As shown, the present invention is applied to the flow chart of the microphone array optimization design method for...
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