Patent ID: 8291764

Claim:
A method of determining an amount of a mass unbalance torque and a corrective balance solution on a rotational assembly in communication with a means to transform rotational energy, wherein an axis of rotation is displaced by an axis angle of displacement from a gravitational force and the sine of said axis angle of displacement is non-zero, the method comprising the steps of: (a) measuring an average instantaneous real power of said means to transform rotational energy over an interval of time, (b) measuring a position reference of said rotational assembly coincidentally with said average instantaneous real power over said interval of time, (c) accumulating said measurements of said average instantaneous real power and said position reference for at least one of revolution of said rotational assembly, (d) performing a mathematical calculation upon said accumulation of said measurements of said average instantaneous power and said position reference to determine an angular velocity, an angular velocity phase and a peak amplitude of said average instantaneous real power and a phase of said average instantaneous real power at said angular velocity of said rotational assembly, (e) dividing said peak amplitude by said angular velocity and a scaling factor to obtain said mass unbalance torque related to rotation of an unbalanced mass, (f) subtracting said phase of said average instantaneous real power and said phase of said angular velocity to obtain an angular displacement from said position reference at said angular velocity, (g) calculating a mass unbalance torque vector equal in magnitude to said mass unbalance torque and having substantially said phase of said average instantaneous real power, (h) determining corrective balance torque vectors wherein the vector sum of said corrective balance torque vectors and said mass unbalance torque vector is substantially nullified and wherein said corrective balance torque vectors substantially coincide with a physical structure on said rotational assembly upon which a corrective weight necessary to produce each of said corrective balance torque vectors is mounted, (i) dividing the magnitude of said corrective balance torque vectors by a radial distance from said axis of rotation of said rotational assembly to determine the amount of said corrective weight at said radial distance for each of said corrective balance torque vectors, and (j) installing said corrective weight at said radial distance on said physical structure for each of said corrective balance torque vectors.