セミアクティブダンパーの減衰性能および制御特性に関する基礎研究

摘要

Structural vibration control is categorized into passive control, active control and semi-active control. Semi-active control using a variable damper stabilizes building responses in an earthquake better than the conventional passive control and active control. This paper used variable hydraulic damper and MR damper. The servo valve of variable hydraulic damper controls the oil flow between two rooms of the cylinder divided by the piston. MR damper changes its damping force by changing the magnetic field acting on the MR fluid according to an electric current. As the first step of the research, in order to evaluate the performance expected from the theoretical study, a dynamic loading test was conducted. Next, authors conducted experiment by the base-isolated specimen of two-degree-of-freedom structure. Finally, the damping performance and control characteristics of semi-active damper were verified.%現在実用化されている構造制御手法は，パッシブ制御，アクティ ブ制御およびセミアクティブ制御に分類できる。パッシブ制御は， その機構がシンプルであり，また外部エネルギーを必要としない反 面，構造物に作用する外乱の周波数特性や入力レベルの変化に対す る追従性には限界がある。