Method and apparatus for balancing
OwnerStephen William Dyerinventor
Life of this patent
Estimating the term…
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.
Claims19
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, wherein said influence coefficient value is calculated by recursive exponentially weighted averaging and two adaptive parameters which are adjusted during each of a plurality of control iterations.
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 adjust two adaptive parameters during at least two control iterations, wherein said controller is effective to cause said at least one movable member to move in accordance with said influence coefficient value and said two adaptive parameters to balance said rotating assembly.
A balancer for use in combination with a rotating tool assembly, which rotates at a certain cutting speed and has a certain amount of imbalance at said certain cutting speed, said balancer comprising:
- at least one movable member which is deployed upon said tool assembly, said at least one movable member having a certain weight distribution, wherein said at least one movable member is effective to be repositioned upon said tool assembly to cause said certain weight distribution to balance said amount of imbalance;
- a vibration sensor which is effective to determine said amount of imbalance and to generate an error signal which represents said amount of imbalance;
- and
- a controller which is coupled to said at least one movable member and said vibration sensor, wherein said controller receives said error signal and calculates an influence coefficient value to select an adaptive gain parameter and an adaptive forgetting factor which are used to calculate a position at which said at least one movable member is moved upon said tool assembly in order to balance said tool assembly.
A method for balancing a rotatable tool assembly, said method comprising the steps of:
- measuring an amount of imbalance within said tool assembly during a certain control interval;
- calculating an influence coefficient value during said certain control interval;
- adjusting two adaptive parameters based upon said calculated influence coefficient;
- providing a balancing rotor which may be removably deployed upon said tool assembly;
- defining a correction movement of said balancing rotor as a function of said influence coefficient value;
- and
- causing said balancing rotor to follow said correction movement.
Dependencies are inferred from the claim text.