| 摘要 |
PURPOSE: To adjust and control a vibration damping device and to retain proper operation by grasping actually controlled damping force characteristics from pressure before and after a control valve, the opening area of the control valve, piston speed, piston stroke etc. CONSTITUTION: Right and left cylinder chambers 13a, 13b are communicated with each other through a communicating circuit 15. An internally filled working fluid moves between both the cylinder chambers in accordance with displacement evolved by a piston 11. The communicating circuit 15 is provided with an electromagnetic proportional control valve 30 to provide resistance force to the flow of the working fluid according to its degree of opening, generating damping force. Inputted to a controller 40 are signals from a displacement sensor 31 for detecting displacement afforded by the electromagnetic proportional control valve 30, pressure sensors 32a, 32b for detecting pressure in both the cylinder chambers. Various control amounts calculated in the controller 40 are analyzed, for example, control state amounts such as pressure before and after the electromagnetic proportional control valve 30, opening area, piston speed, piston stroke amount etc. Suitability of a damping action to its structure is determined to provide the optimum damping force characteristics. |
