METHOD AND SYSTEM FOR CALCULATING CORE SHIFT OF ROTATING BODY

摘要

There is provided a simple method for calculating misalignment of a rotational body. The method for calculating misalignment of a rotational body includes the steps of: deriving radial displacement amounts of the rotational body for at least four or more measurement points along an outer surface in a circumferential direction based on measured values measured by a displacement gage while rotating the rotational body; selecting three arbitrary points among all the measurement points to calculate a calculated circle from the radial displacement amounts and rotation angles; calculating calculated circle values for all the measurement points from the calculated circle; calculating differences between the calculated circle values and the radial displacement amounts as error amounts at the measurement points; summing the error amounts to derive a total error amount value; repeating calculation for combinations of three measurement points among all the measurement points to calculate each total error amount value; selecting a calculated circle with a minimum total error amount value among obtained total error amount values for all combinations as a most probable circle; and calculating deviation between the center of the most probable circle and the center of rotation of the rotational body as misalignment data of the most probable circle.