Identification of Machining System Dynamics by Equation Error Minimization

[+] Author and Article Information
K. Srinivasan

Shell Development Company, Houston, Tex.

C. L. Nachtigal

Automatic Control Center, School of Mechanical Engineering, Purdue University, West Lafayette, Ind.

J. Eng. Ind 100(3), 332-339 (Aug 01, 1978) (8 pages) doi:10.1115/1.3439434 History: Received August 05, 1977; Online July 15, 2010


The application of a sequential equation error minimization method to the identification of the dynamics of machining systems is described here. The development of the identification method was motivated by the need for models of machining system dynamics for the design of active chatter controllers. The dynamic cutting force parameters as well as the machine structure transfer function parameters are required for this task. This identification method is novel in the machine tool area in that it identifies both cutting force parameters and structure parameters with the same experimental data. A convenient excitation of the system dynamics is chosen. The system response is prefiltered before being processed and the equation error minimization scheme is refined to insure the validity of the results obtained. The correctness of the identification scheme is verified by using it to identify parameters in analog computer simulations of practical maching systems. The results of structural identification for experimental plunge cutting operations are also presented here.

Copyright © 1978 by ASME
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