一种舰船磁场信息保护方法

摘要

To deal with the problem that ship magnetic field information is easily measured when they go through foreign ports and main channels, a ship magnetic field information protection method is proposed by adjusting degaussing coils currents to control the amplitude of magnetic field and the magnetic moments.Firstly, the amplitude of ship magnetic field and the magnetic moments are calculated when the degaussing system operates optimally (to minimize the amplitude of magnetic field) or is off.A mathematical model is built with the coils currents as the optimized parameters for the purpose of both controlling amplitude of magnetic field to a certain level and reducing the relativity of the magnetic moments.Then, the particle swarm optimization (PSO) is used to calculate the coils currents.Lastly, the effectiveness of the method is verified by a ship model example.The results show that the method can protect the ship magnetic field information amplitude,the magnetic moments and the passing curve features.%针对舰船在经过他国港口和主要航道期间磁场信息易被测获的问题,提出了通过调整消磁绕组控制磁场幅值和磁矩来实现磁场信息保护的方法.首先,分别计算消磁系统最优状态下(最大限度减小磁场幅值)工作和关闭时舰船磁场的幅值和磁矩,以绕组电流为优化对象、以控制磁场幅值到设定水平和减小磁矩相关性为目标,建立数学模型;然后,采用粒子群算法求解绕组电流;最后,通过船模实例验证了该方法的有效性.结果表明:该方法能够有效保护舰船磁场幅值、磁矩和磁场通过曲线特性等磁场信息.