INVESTIGATION OF THE SOURCES AND CHARACTERISTICS OF ERROR COMPONENTS IN THE ADVANCED INDUCTION-BASED VIBRATION MEASUREMENT TRANSDUCER

According to the results presented in the paper, lowering the amplitude dynamic error of the improved inductive vibration sensor can be accomplished by raising the device’s natural frequency and by selecting an optimal level of relative damping. However, to minimize the phase dynamic error, the relative damping must be kept as small as possible-ideally approaching zero. During the parameter-optimization stage, intended to simultaneously reduce both amplitude and phase dynamic errors, it became evident that such dual optimization is essentially unachievable. This is due to the fact that the amplitude-frequency response and phase-frequency response are physically coupled, meaning that improving one characteristic inevitably worsens the other.