Reduction of Limit Cycle Amplitude in the Presence of Backlash

[+] Author and Article Information
Ronen Boneh, Oded Yaniv

Department of Electrical Engineering-Systems, Tel Aviv University, Tel Aviv 69978, Israel

J. Dyn. Sys., Meas., Control 121(2), 278-284 (Jun 01, 1999) (7 pages) doi:10.1115/1.2802466 History: Received December 13, 1993; Revised February 23, 1999; Online December 03, 2007


The majority of feedback systems driven by an electric motor can be represented by a two-mass system connected via a flexible drive element. Owing to the presence of backlash, the closed-loop performance such as precision speed, position and force control that can be achieved using a linear time invariant controller is limited, and it is expected that a nonlinear control would be superior. In this paper a nonlinear control structure is proposed and a systematic design technique presented. The advantages of the proposed design technique are: (i) It is robust to plant and backlash uncertainty; (ii) it is quantitative to specifications on the maximum limit cycle amplitude; and (iii) the closed loop is superior to a linear controller design both in lower bandwidth and in lower limit cycle amplitude. A design example is included.

Copyright © 1999 by The American Society of Mechanical Engineers
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