Fluid mount with active vibration control
First Claim
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1. An apparatus for controlling the amount of vibration induced by a first member in a second member, comprising:
- a) a housing;
b) a first fluid-filled compliant chamber;
c) a second fluid-filled compliant chamber;
d) means for interconnecting said first and second chambers;
e) at least one piston having a first side for transmitting energy from the fluid in said first chamber through said interconnecting means to said second compliant chamber and a second side for transmitting energy from said fluid in said second chamber through said interconnecting means to said first compliant chamber, said transmitting of energy from both said first and second chambers being responsive to relative movement between said first vibrating member and said second member, said piston being connected to one of said first and second members;
f) energy input means consisting essentially of an actuator fluidically interconnecting said first and second compliant chambers to actively augment the transmission of energy caused by said at least one piston;
whereby the amount of vibrational energy in said second member can be controlled in a desired manner.
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Abstract
A fluid mount with the capability of actively controlling the amount of vibrational energy transmitted thereacross. An actuator is provided in series or in parallel with the inertia track passageway of a double pumper isolation mount to permit the dynamic stiffness of the mount to be varied so as to control the amount of vibrational energy transmitted in a desired manner. A control system for permitting frequency-shaped force feedback control of the device is also disclosed. Utilization of the device as a tuned absorber is also described.
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Citations
20 Claims
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1. An apparatus for controlling the amount of vibration induced by a first member in a second member, comprising:
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a) a housing; b) a first fluid-filled compliant chamber; c) a second fluid-filled compliant chamber; d) means for interconnecting said first and second chambers; e) at least one piston having a first side for transmitting energy from the fluid in said first chamber through said interconnecting means to said second compliant chamber and a second side for transmitting energy from said fluid in said second chamber through said interconnecting means to said first compliant chamber, said transmitting of energy from both said first and second chambers being responsive to relative movement between said first vibrating member and said second member, said piston being connected to one of said first and second members; f) energy input means consisting essentially of an actuator fluidically interconnecting said first and second compliant chambers to actively augment the transmission of energy caused by said at least one piston; whereby the amount of vibrational energy in said second member can be controlled in a desired manner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. Apparatus for controlling operation of an isolation system which has stiffness means for attaching a disturbance source which, in operation has a plurality of excitation frequencies which define a disturbance spectrum, to a structure to be isolated and actuation means for imparting a controlled force between the disturbance source and said structure to be isolated, said apparatus comprising:
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a) signal generation means including i) sensing means for measuring a force transmitted by said isolation system to said structure to be isolated, and ii) means for generating a signal responsive to at least a portion of said disturbance spectrum; b) compensation means for filtering said generated signal and developing an output, said compensation means having a frequency content generally similar to that of said at least a portion of said disturbance spectrum; c) control means for activating said actuation means in such a manner as to reduce said magnitude of said transmitted force. - View Dependent Claims (18, 19)
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20. An active fluid isolation mount for isolating an aircraft engine from its support structure comprising
a) a housing, said housing being adapted for attachment to said engine; -
b) a piston mounted in said housing, said piston adapted for connection to said support structure; c) means for isolating said piston from said housing, said means including i) elastomeric means bonded to said piston and said housing; ii) a first fluid-filled chamber having a first volume stiffness on one side of said piston; iii) a second fluid-filled chamber having a volume stiffness which is substantially similar to said first volume stiffness on another opposite side of said piston; iv) at least one passageway fluidically interconnecting said first and second fluid-filled chambers in order to enable the transmission of vibrational energy between said chambers; v) an actuator associated with and directly fluidically interconnected to said at least one passageway for actively altering an amount of vibrational energy transmitted between said chambers in order to control the amount of vibrational energy in said support structure in a desired manner.
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Specification