Research On Modeling And Simulation Of Electromagnetic Environment Of Launch Vehicle Flight Test

Along with the rapid development for electronic network information technique,launch vehicle,spacecraft technique etc.,to adapt launch and operation demand in the informationization condition,and enhance the applicability and viability for launch vehicle and aerocraft on orbit in complicated electromagnetic surroundings,this paper focuses on the antijamming countermeasure performance of the launch vehicle under the condition of the complicated electromagnetic surroundings.The whole process of the launch vehicle flight test is simulated,and the method of building the complicated electromagnetic surroundings is also analyzed.This paper investigates in detail the spacecraft electromagnetic countermeasure performance in the multi-dimension space of space domain,time domain,frequency domain,energy domain through the electromagnetic surroundings models and simulation system for launch vehicle.The electromagnetic situation faced by various stages of the launch vehicle test is explained,and the adverse effects of electromagnetic jamming are analyzed.The anti-jamming flight test method of the launch vehicle is proposed as well as the main purpose of the equipment test under the complicated electromagnetic surroundings is introduced,and the common and spread spectrum receiver signal power calculation model of the electromagnetic surroundings test system is given for the subsequent electromagnetic equipment modeling and scene simulation to lay the technical foundation.According to the practical needs of the electromagnetic surroundings and flight test of the launch vehicle,a variety of echo signal models are analyzed,and the mathematical model and calculation flow of the radar measurement and control equipment parameters are established.The problem of parameterization modeling of the radio measurement and control equipment during the launch of the launch vehicle is solved through adding the process of the measurement and control equipment simulation into the whole process of launch vehicle flight test simulation,comprehensively testing the performance of the measurement and control equipment in the complicated electromagnetic surroundings,and solving the quantitative analysis problem of the electromagnetic antijamming ability of the measurement and control equipment in the launch vehicle flight test.The working principle and model of the radio jammer are investigated and analyzed,and a signal model of different jamming patterns such as deception and dense false targets is set up,and the targeted construction of the complex electromagnetic surroundings of the launch vehicle is achieved.The simulation flow of the jamming signal is given,and this paper has a detailed simulation analysis for suppression jamming and deceptive jamming electromagnetic surroundings.By using the stitching method of the modular model,the integrated simulation system of the monitoring and control equipment and the jamming equipment is completed.The influence of the electromagnetic surroundings during the flight test of the launch vehicle is deduced.Through using STK and MATLAB to construct and develop the models,the simulation analysis of the rocket flight test under the electromagnetic jamming surroundings improves the cognitive level of the impact of the electromagnetic jamming surroundings and provides the basis for the reliable and stable flight test of the launch vehicle in the electromagnetic jamming surroundings.