| 摘要 |
PURPOSE:To satisfy a required characteristic at a resonant point, by providing means for detecting a load exerted to a cylinder support means and for generating a control signal in accordance with the transfer function of a differentiating filter to make the characteristic of the transfer function equivalent to that of a band pass filter in a predetermined range. CONSTITUTION: A Valve 48FR for controlling the flow rate of hydraulic oil fed to a cylinder 2FR, is controlled in accordance with a signal from a control unit 60 which receives signals from sensors 62 for detecting the internal pressures of cylinder 2FR and the like so that these signals are processed by means of a band pass filter 64 and thereafter delivered to a control circuit 66. The characteristic of the transfer function through this control circuit 66 is equivalent to that of the band pass filter 64, and its band is within a frequency range around an upper spring resonant point. With this arrangement, it is possible to control the dynamic spring characteristic at the resonant point, thereby it is possible to give a dynamic spring characteristic which satisfies a required characteristic at the resonant point. |
