THE DEVELOPMENT OF A DISPLACEMENT AND VELOCITY SENSOR FOR VIBRATION CONTROL

Abstract

This paper proposes a new type of seismic-type sensor based on the principle of servomechanism. The low natural frequency of the sensor is realized by using a positive feedback of the relative displacement and velocity signal, and a negative feedback of the relative acceleration signals between the measured object and the inner mass of the sensor. Based on this principle, a sensor with a light mass and hard spring was constructed. It is shown that a sensor of small size and which is lightweight can have a measuring frequency range in the low region. The results are demonstrated through both simulation and experimentation.