| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control method that is superior in efficiency, even if it is driven at a frequency other than the resonance frequency that a linear vibration actuator has at a resonance frequency, that is decided from a spring constant and the mass of a movable section, in a linear oscillating generator have. <P>SOLUTION: A displacement x 20 of a moving segment 3 is detected by a displacement sensor 14 which is fed back to a gain controller 24 inside a controller 21. A gain determining means 25 outputs a gain variable command 20, based on a driving frequency f26 and the displacement x20. A resulting current command Ic*22 is obtained, by subtracting from a current command Ic 29 a signal obtained by multiplying the displacement x20 with a gain K28. The gain K28 can be varied by the gain variable signal 20. In this way, the apparent resonance frequency can be made to match the drive frequency at all times, allowing higher drive efficiency to be attained than by using conventional methods. <P>COPYRIGHT: (C)2009,JPO&INPIT |
