Claims
- 1. A vibration suppressing structure comprising:
- a main structure;
- a vibration suppressing section disposed in an upper portion of said main structure, wherein said vibration suppressing section is comprised of: an auxiliary structure adapted to undergo vibration in response to the vibration of said main structure occurring due to a disturbance, detecting means for detecting an amount of state variable of said auxiliary structure caused by the vibration, an auxiliary mass, an actuator for controlling said auxiliary mass by an amount of movement in which the amount of displacement of said auxiliary structure detected by said detecting means is multiplied by a predetermined proportional constant, and a damper; and
- setting means for adjusting the proportional constants of said vibration suppressing section which are included in a mass matrix M.sub.T for said vibration suppressing section, a damping matrix C.sub.T, a stiffness matrix K.sub.T, a location vector i.sub.T of a disturbance, in such a manner that the relationships of
- (.omega..sub.T.sup.j).sup.2.M.sub.T.i.sub.T =K.sub.T.i.sub.T
- 2h.sub.T..omega..sub.T.sup.j.M.sub.T.i.sub.T =C.sub.T.i.sub.T
- hold, with respect to a natural frequency .omega..sub.T.sup.j of a j-th mode and a predetermined damping factor h.sub.T.
- 2. A vibration suppressing structure according to claim 1, wherein a plurality of said vibration suppressing sections are superposed one on top of another in the upper portion of said main structure.
- 3. A vibration suppressing structure comprising:
- a main structure;
- a plurality of vibration suppressing sections disposed respectively in an upper portion of said main structure and in an intermediate story of said main structure where an element of an eigen vector of a specific higher mode becomes large, wherein each of said vibration suppressing sections is comprised of: an auxiliary structure adapted to undergo vibration in response to the vibration of said main structure occurring due to a disturbance, detecting means for detecting an amount of state variable of said auxiliary structure caused by the vibration, an auxiliary mass, an actuator for controlling said auxiliary mass by an amount of movement in which the amount of displacement of said auxiliary structure detected by said detecting means is multiplied by a predetermined proportional constant, and a damper; and
- setting means for adjusting the proportional constants of said vibration suppressing section which are included in a mass matrix M.sub.T for said vibration suppressing section, a damping matrix C.sub.T, a stiffness matrix K.sub.T, a location vector i.sub.T of a disturbance, in such a manner that the relationships of
- (.omega..sub.T.sup.j).sup.2.M.sub.T.i.sub.T =K.sub.T.i.sub.T
- 2h.sub.T..omega..sub.T.sup.j.M.sub.T.i.sub.T =C.sub.T.i.sub.T
- hold, with respect to a natural frequency .omega..sub.T.sup.j of a j-th mode and a predetermined damping factor h.sub.T.
- 4. A vibration suppressing structure according to claim 3, wherein the plurality of said vibration suppressing sections are superposed one on top of another in the upper portion of said main structure.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-127806 |
May 1991 |
JPX |
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Parent Case Info
Division of application No. 07/882,013 filed May 13, 1992, now U.S. Pat. No. 5,263,387.
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Divisions (1)
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Number |
Date |
Country |
Parent |
882013 |
May 1992 |
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