Patent ID: 6530270
Filing Date: 2003-03-11
Classification: G01H,G01L,G01M

Abstract:
An assembly for analyzing an apparatus, said assembly comprising:a controller which is operable under stored program control and which selectively communicates a signal which is indicative of at least one pseudo-random wave form to a signal generator; an excitor assembly which is coupled to said apparatus; a signal generator which receives said signal from said controller and generates at least one pseudo-random wave form based upon said received controller signal, wherein said signal generator communicates said pseudo-random wave form to said excitor assembly; a selectively programmable torque generator which selectively emits a signal having a constant frequency and amplitude, said signal representing a mode of operation, wherein said selectively programmable torque generator communicates said signal to said excitor assembly and in response to said communicated signal and said communicated pseudo-random wave form, said excitor assembly creates a vibration signal and applies said vibration signal to said apparatus; and a plurality of sensors which sense at least one attribute of said applied vibration signal and communicate said at least one attribute to said controller, wherein said controller determines a first and a second error based upon said received at least one attribute, said controller creating at least one frequency response signal and a response curve which fits said at least one frequency response signal, said created curve being effective to identify at least one torsional mode of said apparatus, thereby analyzing said apparatus.