Vibration control systems
AssigneeBAE SYSTEMS plc
InventorsSuleiman Mahmoud Sharkh, Stephen Daley, Mehdi Hendijanizadeh
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Abstract
An active vibration control system includes an electromagnetic actuator; a magnetic element; and a solenoid, the electromagnetic actuator being operable to apply a force on a base structure to which the active vibration control system is attachable such that vibrations of the base structure are actively controllable by the application of said force, wherein the electromagnetic actuator is operable to cause movement of the magnetic element through the solenoid and the solenoid is operable to apply a force on the magnetic element.
Claims20
An active vibration control system comprising:
- an electromagnetic actuator;
- a magnetic element;
- and a solenoid;
- the electromagnetic actuator being operable to apply a first force on a base structure to which the active vibration control system is attachable such that vibrations of the base structure are actively controllable by the application of said first force, wherein the electromagnetic actuator is operable to cause movement of the magnetic element through the solenoid, and the solenoid is operable to apply a second force on the magnetic element,
- wherein the electromagnetic actuator is supplied with an AC current, and the solenoid is supplied with a DC current.
A method of actively controlling vibrations of a base structure, the method comprising:
- providing an active vibration control system that includes an electromagnetic actuator, a magnetic element, and a solenoid, wherein the electromagnetic actuator is operable to cause movement of the magnetic element through the solenoid and the solenoid is operable to apply a first force on the magnetic element;
- attaching the active vibration control system to the base structure;
- and
- operating the electromagnetic actuator to apply a second force on the base structure,
- wherein the electromagnetic actuator is supplied with an AC current, and the solenoid is supplied with a DC current.
An active vibration control system comprising:
- an electromagnetic actuator including a coil and a movable member having a permanent magnet, wherein a current flowing through the coil produces a force which acts on the permanent magnet, thereby causing movement of the moveable member relative to the coil;
- a magnetic element connected to movable member of the electromagnetic actuator;
- and
- a solenoid, wherein a current flowing through the solenoid produces an attraction of the magnetic element, thereby causing movement of the magnetic element through the solenoid, and wherein a magnitude of the attraction is a function of an extent to which the magnetic element extends through the solenoid such that the magnetic element experiences a negative stiffness.
Dependencies are inferred from the claim text.