Research On Aircraft Landing Monitoring Method Based On Seismic Signal

The problem of heavy-landing and heavy haul often causes the destruction of runway surface.Therefore,the research on the monitoring method for aircraft landing can locate the vulnerable position of runway.Meanwhile,it can reduce the manual monitoring work and improve the efficiency of runway daily maintenance.The landing stage of the aircraft is mainly divided into two parts: the landing stage and the taxiing stage,which will generate a strong incentive effect on the airport runway.And then this effect will spread along the road surface,thus form seismic waves.The landing position of the aircraft could be located based on seismic waves.But other excitation sources will interfere with the ground motion signal and affect the positioning effect.Therefore,this paper firstly researches the signal decomposition method.According to the characteristics of the seismic wave,this paper proposes the signal decomposition method based on the Experience Wavelet Transform,which can improve the problem of redundant signal decomposition modes by using the spectral envelope instead of the original spectrum.The contrast experiment with Empirical Mode Decomposition algorithm shows that the proposed algorithm has better effect of signal decomposition.Secondly,the target location method is studied.By comparing the influence of the result of the different sensor configuration models,the isosceles right triangle layout is chosen as the experiment layout.In view of the influence of signal distortion and noise in seismic signal propagation,the short-time energy fitting curve method is proposed to implement more accurate estimation of seismic signal time delay.By comparing with the generalized cross-correlation algorithms,the proposed algorithm has better performance in precision of delay estimation.Finally,this paper estimates the location of aircraft by the measured seismic signal.And experiments show that the proposed algorithm can accurately estimate the landing position of the aircraft.