METHOD TO DETERMINE INERTIA IN A SHAFT SYSTEM

摘要

A method to determine inertia of components of a rotating shaft system. The shaft system includes a shaft coupling a turbine to drive the rotation and a load to be driven by the rotation. The method includes steps to: apply a feedback to a forcing input to the shaft system; measure resonant frequency of the shaft; iterate steps 1.a) and 1.b) for different feedbacks; plot resonant frequency squared against gain; and determine inverse of gradient from the plot to give inertia of the turbine. Also a method to determine shaft stiffness using the inertia of the turbine.

主权项

1. A method to determine inertia of components of a rotating shaft system; the shaft system comprising a shaft coupling a turbine to drive the rotation and a load to be driven by the rotation; the method comprising steps to:
a) apply a feedback to a forcing input to the shaft system, wherein the feedback comprises a gain; b) measure resonant frequency of the shaft; c) iterate steps 0 and 0 for different feedbacks; d) plot resonant frequency squared against gain; and e) determine inverse of gradient from the plot to give inertia of the turbine.