Research On Uncertainty Analysis Method Of Complex Target Based On RCS Benchmark

Radar Cross Section(RCS)is a key physical quantity to characterize the stealth performance of a target.In the process of actual RCS testing,the uncertainty causes the difference between the actual measured results and the actual results of the target.Uncertainty analysis has become a key component of RCS testing,representing the reliability and confidence of test results,and has great application and research value.RCS uncertainty analysis usually takes a long time and bears a high cost,so it is very difficult to obtain the uncertainty introduced by complex target testing in practical engineering applications.In order to solve the above problems,this Thesis proposes a complex target uncertainty analysis method based on a typical RCS benchmark.This method has higher degrees of freedom and operability,and is more suitable for practical engineering applications.This Thesis mainly conducts the following research:(1)The first is the research on the selection method of RCS benchmark.Due to the different scattering mechanisms of complex targets,the premise is to select a suitable benchmark.This Thesis proposes a typical standard body selection method based on AHP,and quantitatively analyzes the selection and decision-making process.The feasibility of the method is verified by a calculation example.(2)The second is to analyze the uncertainty introduced by the benchmark test.The source of RCS uncertainty is complex,and it is difficult to build a complete mathematical model.This Thesis obtains the uncertainty of benchmark,and establishes a database of test uncertainty of typical benchmark.(3)Direct uncertainty analysis of complex targets is time-consuming and costly.This Thesis proposes an uncertainty analysis method for complex targets based on D-S evidence reasoning.This Thesis transforms the problem into a quantitative inference problem that utilizes a set of typical benchmarks to infer the uncertainty of complex targets.Finally,this Thesis constructs a complex target uncertainty analysis method and process based on a typical RCS benchmark.Based on the example verification of three different complex targets,the results show that the method has the advantages of strong feasibility,easy operation,cost reduction and efficiency improvement.