Bionic array design method based on bat receiving sound field
A design method and array technology, applied in the direction of sound wave re-radiation, calculation, instrument, etc., can solve the problems of large error in the transfer function of the bionic array, without considering the high-frequency broadband characteristics of the bat receiving sound field and the high-order frequency response components, etc., to achieve The effect of reducing structural complexity and reproduction error
Active Publication Date: 2019-08-16
NORTHWESTERN POLYTECHNICAL UNIV
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However, because the high-frequency broadband characteristics and high-order frequency response components of the bat's receiving sound field are not considered, the error of the relative transfer function between the bionic array and the bat head based on this method is relatively large
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[0049] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0050] The bionic array design method based on the bat receiving sound field of the present invention is characterized in comprising the following steps:
[0051] Step 1: Use the sliding frequency window average processing method to smooth and filter the measured data of the bat head related transfer function, filter out the high-order components of the amplitude spectrum in the head related transfer function, and use the smoothed filtered head related transfer function as a bionic array design a recurring sample of
[0052] Step 2: Using a uniform planar array with the same number of array elements in the x and y directions, based on the array manifold vector, a beamforming model of the bionic array broadband FIR filter is derived. This model transforms the array design problem into a weight optimization problem, and completes the Reproduction or approximation ...
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The invention relates to a bionic array design method based on a bat receiving sound field, and the method comprises the following steps of performing smooth filtering on the measured data of bat headrelated transfer functions by using a sliding frequency window averaging method, removing high-order components in a frequency response function, and retaining main features of the bat head related transfer functions; establishing a beam-forming model of the bionic array wideband FIR filter combined with the FIR filter by using an uniform planar array with the same number of elements in the x andy directions for the bionic array; and finally solving the optimization problem by using the regularized least squares algorithm to obtain an optimal weight of the bionic array. The structural complexity and recurring errors of the bionic array can be reduced using the method provided by the invention. The method uses the smoothly filtered head related transfer function to perform the bionic array design, the global average error between the bionic array and the bat head related transfer function is 12.13%, and the spectral distortion is 2.99.
Description
technical field [0001] The invention belongs to the technical field of bionic design, and relates to a bionic array design method based on bat receiving sound field. Background technique [0002] From the perspective of biological evolution, the bionic array provides the basis and guarantee for the bionic positioning algorithm to take advantage of its own advantages. Therefore, the research on the design of the bionic array is very important for the realization of bionic high-precision positioning. At present, the bionic receiving device based on the bat sound field has defects such as poor flexibility and poor practicability. Using the bionic array to reproduce the bat receiving sound field can effectively solve the problems existing in the existing methods. Generally speaking, the design of bionic array based on the sound field received by bats mainly includes the following steps: [0003] Step 1, bat head related transfer function data acquisition; [0004] Step 2, esta...
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Login to View More IPC IPC(8): G01S15/00G01S7/521G01S7/527G06F17/50
CPCG01S15/006G01S7/521G01S7/527G06F30/20
Inventor 梁红杨长生苏梦娜
Owner NORTHWESTERN POLYTECHNICAL UNIV