| 摘要 |
PURPOSE:To reduce the generation of two vibrations of the one having high amplitude of a given frequency or less and the other having low amplitude of a given frequency or more by a method wherein based on a component of a vibration frequency being a given frequency or more, the drive voltage of a piezoelectric element is controlled and based on a component of a given frequency or less, the drive current of an electromagnet is controlled. CONSTITUTION:A signal from an acceleration sensor 202 installed at a car body and a signal from an engine crank angle sensor 201 are inputted to a CPU 204. The drive current of an electromagnet 107 being an actuator and the drive voltage value of a piezoelectric element 108 are decided by the CPU 204 based on the drive state of an engine obtained by means of the respective signals. An engine rotation secondary component, quaternary component, and up to six-order component vibration are controlled. In the drive frequency of the actuator, a command is effected so that the electromagnet 107 is driven by means of a component of 200Hz or less and the piezoelectric element 108 is driven by a component by means of 200Hz or more. The electromagnet 107 is controlled by a current control circuit 207 and the piezoelectric element 108 by a voltage circuit 208. |
