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On the Design of an Intelligent Suspension for Controlling Passenger Vehicle Roll Stability

[+] Author Affiliations
David E. Simon

Vibration and Sound Solutions, Ltd., Arlington, VA

Mehdi Ahmadian

Virginia Tech, Blacksburg, VA

Paper No. IMECE2002-33457, pp. 263-272; 10 pages
doi:10.1115/IMECE2002-33457
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Dynamic Systems and Control
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 0-7918-3629-0 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

This paper will address the design, laboratory testing, and road testing of a semiactive suspension system for controlling the roll stability of a sport utility vehicle. Four magneto-rheological dampers, specially designed and built for the purpose of this testing, are described along with the vehicle test setup in the laboratory. Additionally, results from a series of tests conducted on the vehicle equipped with magneto-rheological dampers operated according to different control policies are documented. Displacement and velocity-based skyhook control techniques are evaluated among the methods that are implemented on the test vehicle. The test results indicate that neither velocity nor displacement based skyhook control are particularly better than the stock passive suspension (for the system inputs tested in the laboratory). In order to realize any significant performance improvements in practice, it may be necessary to augment the skyhook control methods with additional information, such as the steering angle. The results of this study further indicate that the performance potential of various skyhook control policies is heavily dependent on the tuning of both the controllable damper and the control strategy itself. Additionally, it was shown that velocity based skyhook control exhibits improved performance relative to displacement based skyhook control. It is worth noting that the results presented in this study are greatly affected by the class of vehicle as well as the specific dampers that are used for testing. Testing with a different class of vehicle or with a different type of dampers could result in significantly different conclusions.

Copyright © 2002 by ASME
Topics: Stability , Design , Vehicles

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