アクティブ絶対変位計への現代制御理論適用に向けたシステムの改良

抄録

This study proposes a new type of active Vibrometer measuring vibration possessing long period and wide dynamic range. In order to lower the natural frequency and expand the detectable amplitude, the sensor with the low natural frequency is realized by using feedback control. A digital feedback controller using classical control theory in previous study had problems such as limitation of measurement range, and mismatch of the measurement signal in large amplitude vibration. In order to improve measurement performance more, we aim to introduce the controller with modern control theory. In this report, to measure the relative displacement of the sensor in order to do modern control with two state variables, a photo-reflector is introduced and its property is examined.