초록 ▼

A nonintrusive method for determining the magnitudes and spatial and temporal origins of individual dynamic (time varying) torsion loads acting in superposition on a rotating shaft or system of shafts includes combining the measurements of said shaft\s inertial response to the dynamic torsion loads

A nonintrusive method for determining the magnitudes and spatial and temporal origins of individual dynamic (time varying) torsion loads acting in superposition on a rotating shaft or system of shafts includes combining the measurements of said shaft\s inertial response to the dynamic torsion loads with the measurements of discrete relative angular displacement parameters at causally connected space-time points. Changes in the shaft\s characteristics, such as those due to change in its temperature or degradation of its structural integrity, can be monitored to provide updated torque determinations that maintain accuracy by taking these changes into account and to provide information on the onset and location of shaft fractures. Apparatus based on the method of this invention is self calibrating.

대표청구항 ▼

A method for determining the magnitudes and spatial and temporal origins of independent effective dynamic torsion loads acting in superposition upon a rotating shaft with known inertial and geometric characteristics and known torsional wave speed, a torsion load producing a torsional wave in said ro

A method for determining the magnitudes and spatial and temporal origins of independent effective dynamic torsion loads acting in superposition upon a rotating shaft with known inertial and geometric characteristics and known torsional wave speed, a torsion load producing a torsional wave in said rotating shaft, comprising the steps of: determining the inertial response of said shaft to said superposed torsion loads; determining discrete relative angular displacement parameters of said shaft at predetermined space-time points on said shaft, said space-time points being causally connected through the transmission of a torsional wave from one said point to another; and calculating the magnitudes and origins of the individual dynamic torsion loads from the inertial response and the discrete relative angular displacement parameters.