The Oblique Shot Induced Time-lag Error and Its Correction in Acoustic Target
Bo Song · Tance yu kongzhi xuebao · 2008
In this paper,the influence of oblique shot on time-lag estimation is studied.The method,making use of a circular array to correct the time-lag error induced by the oblique shot,is presented.According to the geometrical relation of the circularity array,an approximate calculation function for the angle between ballistic trajectory projection and target surface is deduced.Through the curve fitting,the almost real angle is obtained,which is used in the correction of the time-lag error.The numerical results show that the influence of oblique shot on position accuracy can be reduced through correcting the error of time-lag and the method is feasible.