Abstract
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. 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, the power consumption of the proposing energy regenerative active vibration control system is measured by electrical power meter to show the validity of the system and the power consumption is compared with power consumption of conventional active vibration control system using linear amplifier. The result shows the power consumption of the proposing system is negative and the power consumption of the conventional system is positive. In other words, the proposing system is regenerating vibration energy in contrast with the conventional system is consuming energy from external source.
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