Model-Free Based Digital Control for Magnetic Measurements
For researchers in magnetic measurements, this work offers a practical control method that handles hysteresis-induced nonlinearities without requiring a system model.
The paper presents a model-free digital control strategy for a magnetic material characterization bench, achieving accurate magnetic induction waveform control despite nonlinear magnetization curves. Experimental results demonstrate effective dynamic performance across varying operating conditions.
This paper presents a novel digital control strategy successfully implemented for a soft magnetic material characterization bench (Epstein frame type). The main objective is to control the magnetic induction waveform whatever the applied excitation and the material under study. Given the nonlinear nature of the magnetization curves of magnetic materials, an original model-free based control technique is considered. Special mention should be made of the interesting dynamic properties in closed-loop against the changes of the operating point related basically to the hysteresis form. The operation and the performances of the digital control method are illustrated in different working conditions through both simulation and experimental measurements.