Research On Direction Finding Based On Ormia Ochracea Coupled Auditory Mechanism

Radio direction finding is the process of determining the direction of the radiation source.The traditional direction finding technology uses interferometer system to realize direction finding by using the relationship between large aperture antenna array and azimuth angle.Auditory localization is the key to survive and realizes by two-ear time difference or pressure.Research shows that the insects with small ear spacing have excellent acoustic position capabilities,especially the Ormia Ochracea can determine the direction of the source of interest with minimal receiving aperture,It provides inspiration for the research of ultra-short baseline positioning.Based on anatomical and physiological basis,foreign scholars established a simple mechanical model of the Ormia Ochracea.We studied the dynamic characteristics of the coupled auditory structure and the mechanism of sound source localization.A bionic coupling processing system is established based on the frequency domain relationship between output and input.Under the background of Gaussian random noise,the system performance and coupling parameters,received signal frequency and azimuth is qualitatively studied by MATLAB.In order to improve the applicability of the coupling processing system,according to the electromechanical system theory,the equivalent coupling circuit model is obtained,and the response sensitivity can be achieved through the coupling circuit parameters.The ADS analysis is carried out to analysis the coupling circuit model and verifies the effectiveness.The research shows that the coupling process amplifies amplitude difference and phase difference simultaneously,based on the two different sensitivities,a coupling parameter optimization algorithm is proposed,which lays a theoretical foundation for frequency transplantation.Finally,combined with the conventional direction finding system,a radio direction finding algorithm based on bionic coupling processing is proposed to provide a theoretical basis for engineering realization.