抄録
Energy consumption to drive actuator is thought as a disadvantage of active vibration control. However, the actuator of active vibration control system absorbs energy from vibrating structure to suppress the vibration. In other words, the actuator regenerates energy from the vibrating structure. Especially, piezoelectric actuator can regenerate energy effectively, because it has few internal energy loss. Recently, class D amplifier based on switching circuit has been utilized due to its high-efficiency. It can drive the actuator with few energy loss and regenerate energy from the actuator. Therefore, the energy regenerative active vibration control system can be realized by using the class D amplifier to drive the piezoelectric actuator. The validity of the system has been shown by numerical simulation. In this paper, a cantilever beam with the energy regenerative vibration control system is produced and power consumption of the class D amplifier and the piezoelectric actuator of the system is measured by electrical power meter to show the validity of the system experimentally. The result shows power consumption of the class D amplifier and the piezoelectric actuator is negative and energy of the vibrating beam is regenerated as electrical power.
