二次曲面建模在近场目标特性中的应用

针对复杂目标的回波信号计算，采用一组平面和二次曲面（柱面、锥面和椭球面）来逼近目标表面的元素，并用一一对应的方法将其对接起来，完成了对目标模型的仿真。改进了采用面元法（用三角形或四边形单元构造目标的表面）构造的目标形体建立的目标模型面元数多、计算速度低的问题。用二次曲面的方法建立了长空靶机的目标模型，计算了目标回波信号，并与实测数据进行了对比，仿真结果和实测结果取得了较好的一致性，因此用二次曲面建立复杂目标模型的方法是可行的。

Application of Quadric Surface Modeling in Near-field Target Characteristic

Target model was simulated through approximation of target surface elements by plan and quadric surface and one by one connection of piecewise models. Computing velocity was improved using target model simulated by this method. Changkong target drone model was simulated and the target echo signal was computed. It was proved that the simulation results agrees well with the measured by comparing numerical calculation with experimental measurements. It was concluded that the modeling method is feasible for complex targets simulation.