Active vibration suppressor
First Claim
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1. A system for suppressing vibrations in an elongate building structure and the like comprising:
- a seismic mass;
actuator means attached to said structure and to said seismic mass for moving said mass in a direction at right angles to said elongate structure;
vibration sensor means attached to said structure for producing control signals representative of lateral movement thereof; and
control means connected to said actuator means and said sensor means, said control means responsive to said control signals to cause said actuator means to move said seismic mass in a direction to oppose such movement of said structure.
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Abstract
An active vibration suppressor for suppressing vibrations in structures, such as buildings, has an actuator attached to the structure and an extendable rod of the actuator attached to a seismic mass which is thus moved by the actuator. A sensor is attached to the structure adjacent to the actuator and connected to a compensated power amplifier which operates the actuator. Movement of the structure is sensed and the actuator moves the seismic mass in a direction to oppose the structural displacement thereby minimizing structural vibrations.
69 Citations
21 Claims
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1. A system for suppressing vibrations in an elongate building structure and the like comprising:
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a seismic mass; actuator means attached to said structure and to said seismic mass for moving said mass in a direction at right angles to said elongate structure; vibration sensor means attached to said structure for producing control signals representative of lateral movement thereof; and control means connected to said actuator means and said sensor means, said control means responsive to said control signals to cause said actuator means to move said seismic mass in a direction to oppose such movement of said structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A closed loop system for damping vibrations in an elongate building structure and the like comprising:
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an acutator attached to said structure at a point of lateral displacement of said structure and having a movable member; a seismic mass attached to said movable member of said actuator; an accelerometer attached to said structure adjacent said actuator; a compensation circuit connected to said accelerometer for receiving output signals therefrom; and a power amplifier connected to said compensation circuit for receiving compensated output signals therefrom, said amplifier having an output operatively connected to said actuator for causing said seismic mass to move in a direction to oppose displacement of said structure. - View Dependent Claims (17, 18)
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19. A method for damping vibrations in an elongate building structure comprising the steps of:
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attaching an acutator to the structure at an area of vibration; attaching a seismic mass to the actuator; sensing lateral displacement of the structure at the area of attachment of the actuator; producing a control signal representative of the displacement; processing the control signal to operate the actuator; and moving the seismic mass in a direction to oppose the displacement. - View Dependent Claims (20, 21)
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Specification