The adaptive control for retrofit traditional milling machine

Author

Huang, Shiuh-Jer ; Yan, Mu-Tyan

Author_Institution

Dept. of Mech. Eng., Nat. Taiwan Inst. of Technol., Taiwan

fYear

1993

fDate

2-8 Oct 1993

Firstpage

2091

Abstract

One-step-ahead adaptive control with an input nonlinearity strategy is proposed to control the converted system of a traditional milling machine table with a lead screw transmission system. The control plant is a traditional lead screw actuated milling machine table which has been retrofitted with DC servomotor control. This old-fashioned machining table has nonlinear time-varying behavior due to the effects of irregular Coulomb friction of sliding surface and obvious backlash. Experimental results show that the control method has reasonable performance in terms of stability, transient response, tracking, and robustness under the influence of time delay of the simple motor driver and 1 mm backlash of each axis. This controller can overcome the nonlinear effect due to Coulomb friction and construct a stable closed-loop system

Keywords

DC motors; adaptive control; closed loop systems; electric control equipment; machine control; machining; maintenance engineering; nonlinear control systems; servomotors; stability; transient response; DC servomotor control; adaptive control; backlash; closed-loop system; input nonlinearity strategy; irregular Coulomb friction; lead screw transmission system; machining; milling machine; nonlinear time-varying behavior; performance; retrofit; sliding surface; stability; time delay; tracking; transient response; Adaptive control; Control systems; Fasteners; Friction; Machining; Metalworking machines; Nonlinear control systems; Robust stability; Servomotors; Transient response;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.299155

Filename

299155