Robust Control of Active Suspensions Using Sliding Modes


Tr.J. of Engineering and Environmental Science, vol.25, pp.79-87, 2001 (Refereed Journals of Other Institutions)

  • Publication Type: Article / Article
  • Volume: 25
  • Publication Date: 2001
  • Title of Journal : Tr.J. of Engineering and Environmental Science
  • Page Numbers: pp.79-87


In this study, a four degrees of freedom vehicle model is used in order to design and check the performance

of sliding mode controlled active suspensions. Force actuators are mounted parallel to the suspensions and

a non-chattering control is realized. Sliding mode control is preferred because of its robust character since

any change in vehicle parameters should not a
ect the performance of the active suspensions. The aim is

to improve ride comfort by decreasing the amplitudes of motions of the vehicle body. Body bounce and

pitch motions of the vehicle are simulated both in the time domain, in the case of travelling over a single

rectangular bump type road pro le, and the frequency domain. Also the phase plane plots of them are

checked. Simulation results are compared with the ones of the passive suspensions. The robust character

of the controller has been demonstrated using di
erent system parameters which it is possible to change

depending on the conditions of the journey. At the end of the study, the performance of the controller and

the improvement in the system performance have been discussed also by considering the ride comfort.