612 圧電アクチュエータとD級増幅器による非コロケーション系のエネルギー回生振動制御(振動制御応用,OS-12 スマート構造システム,総合テーマ「伝統を,未来へ!」)

概要

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Energy consumption to drive actuator is thought as a disadvantage of active vibration control. However, the actuator of the active vibration control system absorbs energy from vibrating structure to suppress the vibration. In other words, the actuator regenerates energy from the vibrating structure. The authors proposed energy regenerative active vibration control using class D amplifier and piezoelectric element. The validity of the proposing method has been shown by numerical simulations and experiments. However, the previous study is concerned with only simple collocation system and does not have generality enough. Energy regeneration seems to be also achieved in non-colocation systems from the viewpoint of energy conservation. However, a paper shows that energy regeneration is not achieved in a 2 DOF system with passive damper and skyhook control. In this paper, power consumption of actuator in collocation system and non-collocation system is considered generally and power flow in the 2 DOF system with skyhook control is analyzed and investigated. The result shows that the power from the actuator to the 2DOF system is positive but the total of the power from the actuator to the 2DOF system and the power from the passive damper to the 2DOF system is negative. The result means that energy regeneration can be achieved by replacing a part of function of passive damper with actuator with velocity feedback control.
2010-09-14