| 摘要 |
PURPOSE:To make a piezoelectric actuator always operate in a compression stress field by computing the elongation of said actuator coupling two vibrating structures to convert it into voltage, and then applying said voltage to said actuator. CONSTITUTION:Two vibrating structures 1, 2 are connected through a vibration isolator 3 and a piezoelectric actuator 4, and provided with a load detector 5. A control part 14 obtains alternating force detected by the load detector 5 and acceleration detectors 12, 13 and the elongation of said actuator 4 corresponding to acceleration, and computes the control quantity of voltage applied to said actuator 4 for generating said elongation. Thus, said actuator 4 is always operated in a compression stress field. |
