Research On The Interference Equivalent Evaluation Model Of The Terminal-sensitive Projectile Millimeter Wave Detector

This paper researches the jamming effect equivalent evaluation model for the millimeter wave(MMW)detector of Terminal-sensitive projectile.The model is used for obtaining the equivalent jamming effect and evaluating the jamming effect of the Terminal-sensitive projectile jammer indoors.It consists of two parts: the Jamming Effect Equivalence Model and the Jamming Effect Evaluation Model.Firstly,the thesis establishes mathematical models respectively for the detection process and interference process of MMW passive detector on Terminal-sensitive projectile,and based on that,the working principle and interference mechanism of the passive detector are studied,which provides theoretical basis for the establishment of the jamming effect equivalence model and the jamming effect evaluation model.Secondly,the propagation characteristics of MMW in Fresnel region are studied and then the paper simulates and analyzes the MMW's energy attenuation in space.The thesis studies the methods of constructing the jamming effect equivalence model from the aspects of shielding cavity size,jamming distance attenuation and the Terminal-sensitive projectile's scanning process.Then the overall design scheme of the jamming effect equivalence model is given.Thirdly,combined with the jamming effect equivalence model of MMW detector,the jamming effect evaluation model based on machine learning classification algorithm is proposed.Support vector machine(SVM)algorithm and back propagation(BP)neural network algorithm are used respectively to build jamming effect evaluation model,and their parameters are tuned for better algorithm performance.The performances of the two evaluation models are compared and then a jamming effect evaluation model with better performance is proposed.Finally,the jamming effect equivalence model and the jamming effect evaluation model of the MMW detector are integrated to construct the jamming effect equivalent evaluation model.The software and hardware implementation of the model is completed and a high tower test platform is built to verify the model's equivalent performance,then the performances of the model's jamming effect equivalence and jamming effect evaluation are verified,respectively.