Variable Medium Trajectory Analysis And Formation Design Of Airborne Acoustic Source Under Multiple Constraints

Acoustic detection is the main means of remote detection.The explosion sound source studied in this paper has the advantages of high energy level and low frequency.It is a good auxiliary sound source for remote detection.Helicopter deployment of sound sources has the characteristics of large launch radius,flexible dispatch and strong concealment,which is a common way to deploy sound sources in antisubmarine warfare today.In the process of underwater detection with the aid of airborne sound source and sonar system,the explosion depth,explosion position,explosion formation and other parameters of the aid sound source directly affect the detection accuracy of sonar,and these parameters are mainly determined by the trajectory of the aid sound source during the whole process from leaving the aircraft to entering the water.Therefore,the ballistic optimization simulation of airborne sound source with elastic medium under multiple constraints is carried out.Air-dropped sound source bombs exploded in formation under water can improve the detection effect of the detection system.The sound source bomb goes through the process of forming different formations from different media to underwater when being dropped from helicopters.There are a lot of constraints,including dropping conditions,aerodynamic characteristics of the sound source bomb itself,dropping wind field environment,water flow environment,dropping point,formation,etc.Under these constraints,the trajectory of the sound source bomb is analyzed.According to the analysis results,the dropping conditions are optimized so that the sound source bomb can drop to the designated drop point under various constraints to form the designated formation explosion,so as to achieve the purpose of improving the detection effect of the detection system.In this paper,based on the theory of flight mechanics,the trajectory and its optimization of airdrop sound source elastic medium are studied.Firstly,the product and technology of submarine sound source at home and abroad,as well as the research situation of air-dropped trajectory and variable medium ammunition are introduced,and the advantages and disadvantages of explosion sound source and traditional electronic sound source are compared.Considering the force,movement and disturbance of aerial,water and underwater sound source projectile,the dynamic and kinematic models of aerial,water and water are constructed.The simulation results of Newton iterative method,geometric estimation method and prior data search method are compared among three array modes: "straight line","zigzag" and "parallel line".In this paper,the principle of explosion source assisted submarine exploration technology is studied,and the method of solving target position information by a single explosion source is given,and the advantages of deploying multiple explosion sources for submarine exploration are illustrated.The trajectory of a single sound source projectile and the scattering of multiple sound sources projectiles are optimized and simulated,and the simulation results are analyzed.The trajectory and landing point in air,water and water are optimized by convex optimization method.