Research on low frequency expansion of magnetoelectric vibration sensors based on lag compensation method
To improve the response performance of magneto electric vibration sensors in the low frequency range,a low-frequency extension method for magneto electric vibration sensors based on hysteresis compensation is proposed.Firstly,the working principle and mathematical model of the magneto electric vibration sensor were analyzed to identify the key parameters that affect the low-frequency measurement performance of the sensor.Then a second-order hysteresis compensation circuit was designed,a low-frequency compensation filtering link was introduced to optimize the transfer functions of input and output,and MATLAB software was used for simulation verification.Finally,a vibration comparison testing system was established for experimental verification.The results showed that the low-frequency extension method of magneto electric vibration sensor based on hysteresis compensation can extend the measurement bandwidth of a mag-neto electric vibration sensor with a natural frequency of 2.02 Hz to 0.202 Hz,verifying the feasibility of this method and providing important technical support for promoting the application of small magneto electric vibration sensors in low-fre-quency measurement scenarios.
vibration sensorlow frequency extensionsensitivitynatural frequencycompensation circuit
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