Pulse excitation technique for determining frequency response of machine tools using an on-line mini computer and a non-contacting electromagnetic exciter

Abstract

An electromagnetic pulse excitation technique for the determination of receptance data is presented. The relative performance of this in relation to the conventional stepped and swept sine methods was established in tests carried out on a horizontal milling machine. Good correspondence between the three techniques was noted, thus confirming the reliability of the electromagnetic pulse technique. The pulse excitation technique was then used for determining the relative response data of a cylindrical grinding machine. These experiments required the development of a new type of magnetic exciter with which a relative force pulse can be applied to the grinding spindle and the workpiece under conditions simulating actual grinding conditions.