Research on Control Strategy of Excitation Coil for Magnetic Focused Torque Sensor
To measure the torque of a rotating shaft under different working conditions,an excitation coil control strategy based on magnetic focusing torque sensor was proposed.This control strategy was based on controlling the stable output amplitude of the sensor to be 2 mV electrical signal.The induction voltage mathematical model and orthogonal experimental method were combined to design the excitation coil control strategies under various working conditions.Theoretical calculations and finite ele-ment simulation verification were conducted on each control strategy using MATLAB and COMSOL software.To simulate the noisy signal obtained by sensors in bench experiments,Gaussian white noise was added to the simulated output electrical signal,and MATLAB simulation software was used to filter and optimize the noisy signal.The simulation results show that this control strategy can enable the sensor to stably output a sinusoidal voltage signal with an amplitude of 2 mV under different working conditions of the rotating shaft,verifying its feasibility.
magnetic focusingtorque sensorexcitation coil control strategycircumferential coilsfilter optimization
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