Abstract
The magnetic field signal induced by the submarine will be captured and located by the airborne magnetic probe. In order to improve the survival rate of submarine after being located, a decoy based on the combination of multiple magnets was designed. The decoy is composed of several solenoid coils, which are arranged linearly among different solenoid coils. The rotation Angle, equivalent current and distance between magnets of each solenoid coil are optimized by genetic algorithm. The simulation results show that the degree of fitting between the decoy and the vertical component of the magnetic field of the submarine at a height of 15m reaches 71.6%, and the total length of the control decoy is less than 7m, which has a certain engineering practical value.