A LQR-based controller with estimation of road bank for improving vehicle lateral and rollover stability via active suspension Articles uri icon

publication date

  • October 2017

start page

  • 1

end page

  • 20

issue

  • 10 (2318)

volume

  • 17

International Standard Serial Number (ISSN)

  • 1424-8220

abstract

  • In this article, a Linear Quadratic Regulator (LQR) lateral stability and rollover controller has been developed including as the main novelty taking into account the road bank angle and using exclusively active suspension for both lateral stability and rollover control. The main problem regarding the road bank is that it cannot be measured by means of on-board sensors. The solution proposed in this article is performing an estimation of this variable using a Kalman filter. In this way, it is possible to distinguish between the road disturbance component and the vehicle's roll angle. The controller's effectiveness has been tested by means of simulations carried out in TruckSim, using an experimentally-validated vehicle model. Lateral load transfer, roll angle, yaw rate and sideslip angle have been analyzed in order to quantify the improvements achieved on the behavior of the vehicle. For that purpose, these variables have been compared with the results obtained from both a vehicle that uses passive suspension and a vehicle using a fuzzy logic controller.

keywords

  • Bank
    LQR
    Active suspension
    Kalman filter
    Roll angle
    Yaw rate
    Sideslip
    Load transfer