激光引信低空海面探测回波特性研究OA

To address the issues of false alarms and premature detonation in laser fuze caused by interference from sea surface scattering echoes during ultra-low-altitude flight skimming the sea surface,a three-dimensional sea surface model was constructed based on an improved JONSWAP spectrum and a small amplitude theoretical model.A sea surface scattering model for laser fuze was established,and the effects of different sea states,pulse widths,incident angles,and beam divergence angles on the sea surface echoes of laser fuze were analyzed through simulation.Simulation results indicate that,after optimization,the three-dimensional sea surface model demonstrates improved performance in simulating the relative height variations and normalized energy distribution of rough sea surfaces.Comparison with published experimental data shows that the maximum absolute errors are reduced by 3.361 3%and 5.522 5%,respectively;under wide-field-of-view detection,the power of the sea surface scattering echoes received by the laser fuze increases as sea surface wind speed increases,the laser beam incidence angle decreases,and the laser pulse width increases;under narrow-field-of-view detection,the sea surface scattering echo exhibits a discrete distribution,and the critical value of beam divergence angle at which the echo signal distribution transitions from discrete to continuous is about 15°.This research provides theoretical support for the design of laser fuze resistant to sea clutter interference.