Abstract
This study presents a novel method to estimate transfer function of flexible mechanical structures mounted on a traveling stage by utilizing only internal information of computerized numerical control (CNC) system. Disturbance force input to CNC is estimated by observer technique and cutting force is estimated based on cutting force model. Analyzing both the forces, frequency response function (FRF) of the mechanical structure is estimated by the proposed method. Assuming a simple dynamic model of the mechanical structure, modal parameters representing the dynamic characteristics of the structure are also identified. Experimental results of a face turning test indicated that the transfer function can be estimated accurately by the proposed method.
