초록 ▼

A hydraulic variable damping device for installation in the frame of a structure to control vibrations while evaluating the damping property of the structure during seismic disturbances. Control means for this device include a command value judging circuit for comparing the plus or minus sign of a d

A hydraulic variable damping device for installation in the frame of a structure to control vibrations while evaluating the damping property of the structure during seismic disturbances. Control means for this device include a command value judging circuit for comparing the plus or minus sign of a differential pressure value between hydraulic chambers within the device with that of a generated damping force command value to output a valve opening command value for fully opening a flow regulating valve when the signs of the command value and the differential pressure value are different from each other. A pressure controller is provided for making a correction based on the feedback of the pressure valve when the signs of the damping force command value and the differential pressure value are the same to generate a valve opening command value. A valve controller circuit is provided for making a correction by feeding back a detected valve opening value of the flow regulating valve with respect to the valve opening command value signal received from the command value judging circuit or the pressure controller to generate a valve opening control command value.

대표청구항 ▼

In a variable damping device for a seismic response controlled structure, said variable damping device having a piston slidably mounted in a hydraulic cylinder and said piston being adapted to reciprocate therein, said cylinder being connected to said frame main body or to one of the said variable s

In a variable damping device for a seismic response controlled structure, said variable damping device having a piston slidably mounted in a hydraulic cylinder and said piston being adapted to reciprocate therein, said cylinder being connected to said frame main body or to one of the said variable stiffness elements; said piston being connected to one of said variable stiffness elements or to said frame main body; hydraulic chambers in said hydraulic cylinder being provided on opposite sides of said piston; a flow passage for interconnecting said hydraulic chambers with each other; and a flow regulating valve provided on said flow passage; the improvement comprising: control means for controlling the opening of said flow regulating valve, said control means including damping force judging means for judging a damping force to be generated by said device on the basis of the responses of said structure by the vibrational and external force and for generating the value corresponding to said damping force as a generated damping force command value S1; valve opening detection means for detecting the opening of said flow regulating valve and for generating the value corresponding to said opening as a detected valve opening value S5; pressure detection means for detecting the hydraulic pressure of said both hydraulic chambers and for generating the value corresponding to said hydraulic pressure as detected hydraulic pressure values S6 and S7, respectively; a subtraction circuit for generating the value corresponding to the difference between said both detected hydraulic pressure values S6 and S7 as a differential pressure value S8; a command value judging circuit for judging the sign of said generated damping force command value S1 and that of said differential pressure value S8 and for generating the value corresponding to said generated damping force command value S1 as a pressure command value S2 when said signs are the same, while generating the value corresponding to the value where the opening of said flow regulating valve is fully opened as a valve opening command value S3 when said signs are different; a pressure controller circuit for feeding back said differential pressure value S8 with respect to said pressure command value S2 to make a correction and for generating the valve opening command value S3 corresponding to the correction value; a valve opening controller circuit for feeding back said detected valve opening value S5 with respect to said valve opening command value S3 to make a correction and for generating the valve opening control command value S4 corresponding to the correction value; and operating means for actuating said flow regulating valve on the basis of said valve opening control command value S4.