Robust H_control of ER suspension subjected to system uncertainties

Sang-Soo Han; Seung-Bok Choi

doi:10.1117/12.420892

21 March 2001 Robust H_control of ER suspension subjected to system uncertainties

Sang-Soo Han, Seung-Bok Choi

Proceedings Volume 4235, Smart Structures and Devices; (2001) https://doi.org/10.1117/12.420892
Event: Smart Materials and MEMS, 2000, Melbourne, Australia

Abstract

Vehicle suspension is normally used to attenuate unwanted vibration from various road conditions. The successful suppression of the vibration leads to the improvement of ride comfort as well as steering stability. One of attractive candidates to formulate successful vehicle suspension is to use ER(electrorheological) fluid damper. This paper presents robust control performances of ER suspension system subjected to mass and time constant uncertainties. After identifying dynamic bandwidth of a cylindrical ER damper associated with two different ER fluids(one has fast response characteristic, while the other has slow response characteristic), a quarter car model is established by incorporating with time constant of the damping force. A robust H? controller, which compensates mass and time constant uncertainties, is designed in order to suppress unwanted vibration of the vehicle suspension. Control responses such as vertical acceleration are presented in time domain. In addition, the effect of time constant of the damping force on the vibration control performance is investigated via comparative work between fast and slow dynamic characteristics of the ER damper. The control responses presented in this work will provide very useful guidelines in adopting proper ER fluids for right application devices.

Citation Download Citation

Sang-Soo Han and Seung-Bok Choi "Robust H_control of ER suspension subjected to system uncertainties", Proc. SPIE 4235, Smart Structures and Devices, (21 March 2001); https://doi.org/10.1117/12.420892

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available