| 摘要 |
PURPOSE:To improve a response to vibration of high band frequency, by amplifying an output of a vibration sensor in a signal processing part while evaluating its output in a brake control part and driving a brake device, when the vibration is decided to be in a natural frequency, so as to promptly damp the vibration of large amplitute. CONSTITUTION:A peripheral direction groove 8 of corrugated section is provided in the internal peripheral surface of a cylinder 7, and a piston-shaped damping member 10, having a similar peripheral direction groove 9, is arranged being magnetically insulated from the cylinder 7. An excitation coil 12 is concentrically provided with a rod 11 of said damping member 10, and the cylinder 7 is filled inside with magnetic fluid 15. Here the excitation coil 12, if it is excited, increases viscosity of the magnetic fluid, suppressing a motion of the dampling member 10. Accordingly, a response to a vibration of high band frequency can be improved by amplifying an output of a vibration detecting sensor in a signal processing part while evaluating its output in a brake control part and exciting the excitation coil 12, when the vibration is decided to be in a natural frequency, so as to promptly damp the vibration of large amplitude. |
