This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Road Preview Control for Active Suspension System
Abstract:
The industrialization of the measurement systems of road profiles enabled the
deployment of the road preview control strategies for the vehicle-controlled
suspensions. This article proposes a new active suspension control strategy in
which a model reference controller (MRC) is improved through the road preview
capability. The road preview control uses the feed-forward road input signals
and the feedback vehicle state signals as controller inputs. A thirteen
degree-of-freedom (DOF) full vehicle vertical dynamics model including
stabilizer bars is used. Eight proportional integral derivative (PID)
controllers for sprung and unsprung masses have been used in the control
strategy. The controller parameters including the preview distance have been
obtained by using a gradient-based optimization routine with an objective
function that includes both ride comfort and road holding. The ride performance
of the road preview control strategy is evaluated by using a measured stochastic
road profile. The results illustrated the potential of the road preview control
strategy to improve the ride performance compared with the MRC without road
preview control.