Optimization Of Underwater Acoustic Countermeasures Based On Passive Sonar Simulation

Sonar and torpedo promote and restrict each other.On the one hand,the attacker fires the torpedo and continuously upgrades to hit the target.On the other hand,the defender continuously develops new equipments to guard against the torpedo attack.The underwater acoustic confrontation is the process where the two sides compete against each other.The game between the torpedo and the defender includes our platform(defender)and torpedo(attacker).The scene starts with the enemy launches a torpedo to attack on our side,and our opponent how to fight against the torpedo with effectiveness and strategy.Due to the characteristics of high torpedo speed,short process time,and complex battlefield environment during the confrontation,it is difficult to carry out the actual combat-type complete confrontation.Based on this,from the perspective of the defender,this article builds a set of underwater acoustic countermeasures simulation system based on passive sonar,and specifically optimizes the problems found in the countermeasure system from the aspects of tactics and anti-interference.Performance is iteratively transplanted to a three-generation underwater acoustic parallel system,and the performance optimization is completed in terms of deduction.In order to implement the underwater acoustic countermeasure simulation system based on passive sonar,this paper first simulated the modules of the marine environment(sound field,noise),torpedo radiated noise,acoustic signals of countermeasure equipment(jammers,acoustic bait)and passive sonar signals.According to the preset battlefield situation,this paper analyzes the results of passive sonar processing.It is observed that our passive sonar is affected by the placement of countermeasure equipment.It is difficult to identify the torpedo position on the time-direction chart.The line spectrum and modulation spectrum of the torpedo are also difficult to be detected and identified.This paper conducted the anti-jamming optimization and tactical strategy optimization on the underwater acoustic countermeasure system.Due to the impact of the launch of countermeasure equipment on our passive sonar,this paper used the adaptive beamforming,nulling beamforming,and blocking array preprocessing methods to resist interference from specific orientations.Secondly,as a defender,in order to achieve a better confrontation effect,this paper explores the effects of two types of countermeasures,jammers and acoustic decoys,then creates an evaluation criterion using the distance of the torpedo and our submarine.The adaptive mutation particle swarm optimization algorithm is used to optimize the run time of the acoustic bait and the jammer,the turning radius of our submarine,and the time to change to direct route.By using the anti-jamming optimization and the tactical strategy optimization,it can be seen that the performance of the optimized results has been improved in terms of passive sonar processing effect and countermeasure success rate,which verifies the effectiveness of the optimization.In the end,the underwater acoustic countermeasure system based on passive sonar is implemented on a parallel processor.The results through anti-jamming optimization and tactical strategy optimization are better than the before results.The conclusion is consistent with the previous simulation results,which verifys the effectiveness of the optimization and the engineering realization of the adversarial system.