NDLI: Modeling of pivot friction using relay function and estimation of its frictional parameters

Content Provider	IEEE Xplore Digital Library
Author	Chang, H.S. Baek, S.E. Park, J.H. Byun, Y.K.
Copyright Year	1999
Description	Author affiliation: Electro Mech. Lab., Samsung Adv. Inst. of Technol., Suwon, South Korea (Chang, H.S.)
Abstract	One way of modeling frictional effects that arise from pivot ball bearing in rotary disk drive actuator requires a special experimental setup. In this paper, a revised model from two-slope and three-slope model with omission of first slopes from both position and velocity feedback and an addition of relay, is presented. The hysteresis characteristics of ball bearing are much more accurately described by a relay added on the velocity feedback. For parametrization, a mathematical description of the frictional relay is obtained, and both linear and nonlinear terms in the friction model are treated simultaneously by using conventional recursive-least-square method incorporating a new technique that extracts V/sub th/ threshold parameter. The effectiveness of the new friction model is tested by a parameter estimation scheme, and simulation and experiment of the estimation algorithm are also demonstrated for overall performance.
Starting Page	3784
Ending Page	3789
File Size	501383
Page Count	6
File Format	PDF
ISBN	0780349903
ISSN	07431619
DOI	10.1109/ACC.1999.786216
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-06-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Friction Relays Ball bearings Feedback Disk drives Pneumatic actuators Hysteresis Mathematical model Testing Parameter estimation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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