Scaling Target Echo Modeling Technology Based on Modified Highlight Model

In the near field, when a target does not move along the line, the velocity of each highlight is no longer equal to the velocity of the geometry center of the underwater target. Aiming at this problem, a typical resolving method for the highlight velocity of the moving target is presented, and hence a modified highlight model is built. Effects of torpedo-target distance, board angle of target, target speed and rotary angle speed on the echo spectrum are computed. Echo spectrum of the modified model is widened evidently, and the widening phenomenon is influenced mostly by target speed and rotary angle speed. Simulation results indicate that the proposed model can simulate the echo characteristic of underwater target more closely, and the model is feasible.