Research On Submarine Multidimensional Magnetic Field Compensation Based On Improved Whale Algorithm

Submarines are complex ferromagnetic ships composed of hulls,weapon systems,and power units.Under the magnetization of the geomagnetic field,the induced magnetic field generated in the local space of the submarine is superimposed with the geomagnetic field vector,resulting in the distortion of the space magnetic field,which will expose the location of the submarine.In order to avoid space magnetic field distortion,a multi-dimensional magnetic field compensation strategy can be used to make the longitudinal,transverse and vertical windings of the submarine generate compensation magnetic fields that are equal in magnitude and opposite to the induced magnetic field,so as to improve the magnetic stealth capability of the submarine.Whale Optimization Algorithm(WOA)has the advantages of strong local search ability and simple parameter setting,and has been widely used to solve various optimization problems.Therefore,this thesis conducts research on the multi-dimensional magnetic field compensation of submarines based on the improved whale algorithm.The main work contents are as follows:According to the ferromagnetic structure of the submarine,the submarine ship model is built;through 3D modeling and grid division,the finite element model of the induced magnetic field of the submarine ship model is obtained;the measured value of the induced magnetic field of the submarine ship model is compared with the simulation data of the finite element model,which verifies the accuracy of the finite element model of the induced magnetic field of the submarine ship model.An improved whale algorithm based on nonlinear weights and simulated annealing algorithm is proposed.The convergence speed of individual whales in the spiral encirclement phase and the bubble network attack phase is adjusted by nonlinear weights,and the simulated annealing algorithm is introduced to adjust the position of the original population,which enhances the global optimization ability of the whale algorithm.The induced magnetic field generated by the geomagnetic field acting on the submarine is decoupled,and the induced magnetic field generated by the geomagnetic field in the longitudinal,transverse and vertical directions is obtained.Define the multi-dimensional magnetic field compensation objective function of longitudinal,transverse and vertical induction magnetic fields,and use the standard whale algorithm,genetic algorithm and improved whale algorithm to calculate the optimal solution,and get the improved whale algorithm in longitudinal,transverse and vertical induction magnetic field The multi-dimensional magnetic field compensation efficiencies of the magnetic field are 89.21%,86.72%,and 89.69%,respectively,which are 10.03%,9.13%,and 9.44% higher than the standard WOA,respectively,which verifies the superiority of the improved whale algorithm in the multi-dimensional magnetic field compensation of submarines.The development of submarine magnetic field stealth engineering has certain guiding significance.