动力学特性对单站动态雷达散射截面的影响分析

Analysis of the influence of dynamic characteristics on single station dynamic radar cross section

针对目前动态RCS仿真中动力学建模方面研究较少,无法获取目标飞机参数,常用的简化动力学模型得出的仿真结果准确性无法保证的问题,将典型航路飞行动态RCS作为研究对象,分别建立基于六自由度全量模型与三自由度简化模型下的航路仿真动力学模型,并利用动态在线联合仿真计算,获得飞机在典型航路下的动态RCS数据,通过统计学分析和相关性分析,对比分析两种动力学模型对应的动态RCS差异。仿真结果表明:在机动飞行阶段,由于姿态角变化导致RCS产生误差,但从整个航路过程来看,在不同飞行速度和不同雷达探测频段下,两种动力学模型下的RCS变化趋势基本相同,表现为极强相关,三自由度航路仿真模型基本能够满足航路飞行过程中动态RCS特性的建模需求。

At present,there are fewer studies on dynamic modeling in dynamic RCS simulation,the target aircraft parameters cannot be obtained,and the accuracy of simulation results from the com-monly used simplified dynamic model cannot be guaranteed.Taking the dynamic RCS of a typical trajectory as the research object,the dynamic model is established on the basis of the full 6DOF model and the simplified 3DOF model under the simulation of a trajectory,and the dynamic online joint simulation is used to obtain the dynamic RCS data under a typical trajectory through statistical analysis and correlation analysis.The dynamic RCS data of the aircraft under typical flight paths are obtained,and the differences in the dynamic RCS corresponding to the two dynamic models are com-pared and analysed by statistical analysis and correlation analysis.The simulation results show that in the manoeuvring flight phase,the attitude angle changes lead to the RCS error,but from the per-spective of the whole flight process of the flight path,under different flight speeds and different radar detection bands,the RCS trends under two dynamics models are basically the same,which show extremely strong correlation,and the 3DOF simulation model is basically able to satisfy the requirements for the modelling of the dynamic RCS characteristics in the course of the flight path.