Method and apparatus for balancing
First Claim
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1. A balancer for use in combination with a rotating assembly, said balancer comprising:
- at least one movable member which is removably deployed upon said rotating assembly and which is effective to selectively balance said rotating assembly; and
a controller, coupled to said movable member and adapted to calculate an influence coefficient value and to periodically modify said influence coefficient value and to cause said movable member to move in accordance with said calculated influence coefficient value and said modified value effective to balance said rotating assembly solely by said movement of said at least one movable member.
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Abstract
A balancer assembly 10 which automatically provides balancer limits, which achieves a balancing state while substantially minimizing short term vibration increases and which provides for multi-plane balancer dithering.
97 Citations
24 Claims
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1. A balancer for use in combination with a rotating assembly, said balancer comprising:
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at least one movable member which is removably deployed upon said rotating assembly and which is effective to selectively balance said rotating assembly; and
a controller, coupled to said movable member and adapted to calculate an influence coefficient value and to periodically modify said influence coefficient value and to cause said movable member to move in accordance with said calculated influence coefficient value and said modified value effective to balance said rotating assembly solely by said movement of said at least one movable member. - View Dependent Claims (2)
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3. A balancer for use in combination with a tool assembly of a certain type and which moves at a certain speed, said balancer comprising:
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at least one movable member which is removable deployed upon said tool assembly and which is effective to selectively balance said tool assembly;
a vibration sensor which senses a first amount of vibration of said tool assembly; and
a controller, coupled to said at least one movable member and to said vibration sensor said controller being adapted to recognize said certain type and based upon said certain type to calculate a second amount of vibration and to compare said first amount of vibration with said second amount of vibration and to move said tool assembly effective to reduce said first amount of vibration when said first amount of vibration exceeds said second amount of vibration, effective to balance said tool assembly solely by said movement of said at least one movable member. - View Dependent Claims (4)
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5. A balancer for use in combination with a tool assembly and which moves at a certain speed, said balancer comprising:
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at least one movable member which is removably deployed upon said tool assembly and which is effective to selectively balance said tool assembly solely by movement of said at least one movable member;
a vibration sensor which senses a first amount of vibration of said tool assembly in combination with some certain measurement noise; and
a controller, coupled to said at least one movable member and to said vibration sensor said controller being adapted to recognize said certain measurement noise and based upon certain measurement noise to calculate a second amount of vibration and to compare said first amount of vibration with said second amount of vibration and to move said tool assembly effective to reduce said first amount of vibration when said first amount of vibration exceeds said second amount of vibration. - View Dependent Claims (6)
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7. A balancer for use in combination with a tool assembly, which moves at a certain speed and which vibrates with a certain vibration level, said balancer comprising:
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at least one movable member movably deployed upon said balancer; and
a controller operatively connected to said first and to said second movable members and adapted to move at least one movable member effective to balance said tool assembly solely by said movement of said at least one member and without substantially increasing said vibration level. - View Dependent Claims (8)
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9. A balancer adapted for use upon a moving member, said balancer comprising:
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a movable member adapted to selectively balance said moving member upon the occurrence of a certain level of vibration of said moving member which exceeds a certain amount; and
a controller adapted to periodically change said certain amount, thereby balancing said moving member solely by said movement of said movable member.
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10. A method of balancing a tool assembly by selectively employing a balance weight correction to said tool assembly, said method comprising the steps of:
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employing a first balance weight correction to said tool assembly;
measuring an amount of vibration associated with said balance tool assembly;
estimating an influence coefficient value of said tool assembly by use of variable parameters;
dividing said measured amount of vibration by said estimate influence coefficient thereby creating a certain value;
multiplying said certain value by a gain parameter value, thereby creating a second certain value;
subtracting said second certain value from said first balance weight correction; and
applying said new balance weight correction to said tool assembly. - View Dependent Claims (11, 12, 13, 14)
providing a previously estimated influence coefficient value;
calculating a currently estimated influence coefficient value;
multiplying said currently estimated influence coefficient by a certain value, thereby creating a first new value;
subtracting said certain value from one, thereby creating a second new value;
multiplying said previously estimated influence coefficient value by said second new value, thereby creating a third new value; and
adding said second new value to said third new value.
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12. The method of claim 10 wherein said certain value equals zero.
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13. The method of claim 10 where said certain value equals one.
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14. The method of claim 10 wherein said certain value equals a value between zero and one.
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15. A method of balancing a tool assembly comprising:
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calculating a normalized measure of influence coefficient estimation convergence error;
defining at least one parameter as a function of said normalized measure of influence coefficient error;
providing a balancing rotor;
movably placing said balancing rotor upon said tool assembly; and
moving said balancing rotor in accordance with said at least one parameter thereby balancing said tool assembly solely by said movement of said balancing rotor. - View Dependent Claims (16)
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17. A method to correct a certain amount of unbalance of a rotating member, said method comprising the steps of:
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calculating said certain amount of unbalance correction;
reducing said calculated certain amount of unbalance correction by a second certain amount;
providing at least one movable balancing rotor; and
applying said second certain amount of unbalance correction to said rotating member by moving said at least one movable balancing rotor, thereby correcting said unbalance of said rotating member solely by said movement of said at least one balancing rotor.
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18. A balancer adapted for use upon a rotating member, said balancer comprising:
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first and second movable members deployed upon said rotating member; and
a controller, coupled to said first and second moveable members and which is adapted to move said movable members to substantially prevent an increase in the vibration level during the balancing of said rotating member, thereby preventing said increase in said vibration level solely by said movement of said first and said second movable members. - View Dependent Claims (19, 20, 21)
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22. A balancer assembly having a plurality of vibration sensors and at least one selectively movable balancing rotor, each of said vibration sensors generating a vibration signal, said balancer assembly adapted to allow a user to specify which of said vibration signals are to be minimized as a balance correction is made solely by the movement of said at least one selectively movable balancing rotor.
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23. A balancer which selectively balances a rotating assembly which vibrates in response to a certain amount of unbalancing, said balancer comprising:
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a plurality of sensors, each of said sensors generating a vibration signal;
at least one moveable member deployed upon said rotating assembly; and
a controller adapted to selectively move said movable member to a position which minimizes the combination of the amount of vibration of said rotating assembly, the amount of unbalance correction and a time period in which said unbalance correction is applied to said rotating assembly, thereby minimizing said combination of said amount of vibration, said amount of unbalance correction, and said time period solely by said movement of said at least one movable member. - View Dependent Claims (24)
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Specification