A method to optimize the magnetic susceptibility of ferromagnetic objects

With respect to the difficulty of getting the magnetic susceptibility of ferromagnetic objects in engineering, with the measured data of magnetic field, the multi dimensional optimizing model for magnetic susceptibility is established based on the element surface integral method in calculating induced magnetic field of ferromagnetic objects and the Differential Evolution algorithm with the advantage of global multi dimensional optimizing is introduced to solve it. Then, the induced magnetic field of ferromagnetic object can be fixed. Finally, a magnetic-field measurement experiment for a hollow cylinder is designed and the result shows that the multi dimensional magnetic susceptibility and the induced magnetic field of ferromagnetic objects can be calculated efficiently and accurately.