Design of a Hardware Observer for Active Machine Tool Control

[+] Author and Article Information
E. E. Mitchell

Weapons and System Engineering Department, U. S. Naval Academy, Annapolis, Md.

E. Harrison

Mechanical Engineering Department, Clemson University, Clemson, S. C.

J. Dyn. Sys., Meas., Control 99(4), 227-232 (Dec 01, 1977) (6 pages) doi:10.1115/1.3427112 History: Received October 18, 1977; Online July 13, 2010


Observer theory is applied to design an active controller for a machine tool such as a lathe to reduce the chatter tendency and forced vibration effects that can be detrimental to a workpiece surface finish. An observer is used to estimate difficult to measure relative motion between the cutting tool and workpiece. The estimated motion is used in conjunction with measured states in a second application of observer theory to design a control system that causes the cutting tool to track the workpiece, negating relative vibratory motion. Hence, the entire control system with the cutting tool position as an output is an observer of workpiece motion. Stability of the controlled system as a function of mismeasurements of dynamical parameters and its ability to reduce forced vibration effects are discussed. Performance calculations are based on a second order machine tool-workpiece dynamical model; however, the presented methods of design and analysis can be extended to higher order systems.

Copyright © 1977 by ASME
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In