Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2021
Date : September 13, 2021 - September 17, 2021
In this study, we propose a seismograph controlled by a digital controller with state feedback control and absolute acceleration feedforward control. In this report, in addition to the state feedback controller designed in the previous research, the absolute acceleration feedforward controller was designed by frequency response simulation. These composite controllers were mounted on a digital controller to control the absolute displacement sensor. As a result of measuring and evaluating the frequency response and time history response, the target 0.1 Hz seismic wave was not reached, but the amplitude could be measured up to 224 times the movable range of the weight in the frequency band of 0.28 Hz to 1.5 Hz. This is a result that exceeds 100 times the range of motion of the target weight. However, the phase was not constant between 0.28Hz and 1.5Hz, and it was not possible to acquire seismic waves consisting of composite waves of various frequencies in that frequency band.
