Research On Mission Rehearsal And Simulation Technology Of Unmanned Reconnaissance Aircraft

Mission rehearsal is the process of simulating and deducing the content of mission planning by using computer simulation modeling technology.After the mission plan is completed and assigned,the mission is pre-executed through the mission rehearsal step until the conditions are met.Mission rehearsal system of unmanned reconnaissance aircraft is based on mission planning,and performs signal-level simulation and real-time display on the execution process of the mission.With the help of simulation results,it evaluates the rationality of the mission planning content,and assists the mission planner to adjust the content.In this paper,the mission rehearsal system of unmanned reconnaissance aircraft is taken as the research goal,and the structural design of the system and the establishment of the simulation model are deeply studied.The main work of the paper is as follows:1.According to the needs of the project,the system requirements,objectives and module are analyzed.The structure diagram of the unmanned reconnaissance aircraft mission rehearsal system is designed and the function of each module is analyzed in detail.On this basis,the overall structure and deduction process of the deductive simulation system are designed.2.The extraction technology of emitter parameters used in the deduction process is studied.Firstly,the transmitting signal model,interception model,and time domain parameter measurement model are established and the high-efficiency digital channelization model of the polyphase filter structure is derived.Then,the direction finding principle of phase interferometer and several deblurring methods are studied.The simulation results of the interferometer direction finding algorithm based on extended baseline are presented.All the algorithm model is verified by software simulation.3.The technology of sorting and identifying the emitter signals used in the deduction process is studied.Firstly,the principle of the traditional K-Means algorithm is studied.However,due to the application defects of the traditional K-Means algorithm,this paper adopts an improved K-Means algorithm.The improved algorithm does not need to set the number of clustering centers in advance and can greatly reduce the sensitivity of the algorithm to noise and outliers.Then the principle and steps of the main sorting algorithm PRI transform method and the modified algorithm of radar signal are studied.All the algorithm model is verified by software simulation.4.The design and implementation of the unmanned reconnaissance aircraft mission rehearsal software system was carried out.The mission rehearsal software was developed in C# language under the Windows operating system,focusing on the design of database interface,the implementation of file loading and management,the setting of deduction parameters,the establishment and calculation of deduction simulation model,the control of the deduction process,the digital map,the real-time display of the table,and the statistical analysis were carried out.Finally,the function of the system was tested and verified in the task scenario.