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Closed loop control of hysteretic magnetization

This paper presents a novel method for closed loop control of magnetization of ferrite material using concepts from nonlinear control theory. A first principle nonlinear mathematical model of magnetization has been developed that describes the temporal dynamics of the magnetization process. Using concepts from nonlinear control theory, it is shown that the developed control system is able to maintain the magnetization of the structure at a desired level in the presence of arbitrary ambient excitation. Simulation of the nonlinear controller, and experimental PID studies are presented to illustrate the proposed method of closed loop control of magnetization.