Actuator and system for controlling vibration of structure

Details Actuator and system for controlling vibration of structure Actuator and system for controlling vibration of structure

1990-06-12

1992-04-28

Chilcot, Jr., Richard E.

Static structures (e.g., buildings)

Controlled by condition responsive means

52167DF, E04B 198

Patent

active

051076349

ABSTRACT:
A vibration control system for a structure comprises an actuator connected in a truss structure as a structural member, for varying an axial stiffness in response to a control signal, at least one vibration sensor for producing a sensor signal representing a vibratory motion of the structure, and a controller for controlling vibrations of the structure by producing the control signal in accordance with the sensor signal. Preferably, the actuator comprises inner and outer tubes axially movable relative to each other, and a piezoelectric element which can change the axial stiffness of the actuator by allowing and preventing the relative movement between the inner and outer tubes.

REFERENCES:
patent: 4799339 (1989-01-01), Kobori et al.
patent: 4841685 (1989-06-01), Masri et al.
patent: 4964246 (1990-10-01), Kobori et al.
patent: 5005326 (1991-04-01), Ishimaru et al.
Document 1: "Dai 31 Kai Uchukagakugijutsukoenkaikoenshu", 1987, pp. 400-401.
Document 2: "Dai 32 Kai Uchukagakugijutsukoenkakikoenshu", pp. 334-335.
Document 3: "Dai 31 Kai Uchukagakugijutsukoenkaikoenshu", pp. 256-257.
Document 4: "Dai 31 Kai Uchukagakugijutsukoenkaikoenshu", pp. 398-399.
Document 5: "Dai 31 Kai Uchukagakugijutsukoenkaikoenshu", pp. 258-259.

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