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Anti-Lock Braking Control of an Electromagnetic Brake-by-Wire System

[+] Author Affiliations
Sohel Anwar

Purdue School of Engineering and Technology

Paper No. IMECE2005-79149, pp. 303-311; 9 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Dynamic Systems and Control, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 0-7918-4216-9 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


This paper presents a nonlinear sliding mode type controller for slip regulation in a braking event for an electromagnetic brake-by-wire system equipped automobile. The electromagnetic brake -by-wire system under consideration consists of a set of eddy current brakes attached to the automobile wheels. The anti-lock braking controller modifies the brake torque command generated by a supervisory controller which, in turn, is based on the driver’s command sensed via brake pedal sensors. The modified brake torque command is then generated by a closed loop actuator control algorithm to control the eddy current brake (ECB) system. It is shown in this paper that the proposed anti-lock braking control system is stable in the sense of Lyapunov. Experimental results are presented for a test vehicle equipped with an electromagnetic brake-by-wire system. Experimental results show that the proposed anti-lock brake control algorithm provides very good slip regulation in a braking event on low friction coefficient surfaces (wet Jennite) when compared with that of a non anti-lock braking event. Experimental results also indicate that the proposed anti-lock braking control system provided a very smooth stop for the vehicle.

Copyright © 2005 by ASME



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