Investigation of Vehicle Handling and Ride Comfort Oriented Cooperative Optimization 2010-01-0722
The characteristics of suspension elastic elements (i.e.,
spring, damper and anti-roll bar) are directly related to the
handling and ride comfort performances, how to tune the
characteristics of suspensions' elastic elements is always a
big issue in developing the chassis of a vehicle. In this paper, a
multi-body dynamics model of a passenger car within MSC.ADAMS® is
integrated with iSight FD®, an optimization tool, to carry out a
multi-objective optimization for improving the behavior of vehicle
handling and ride comfort. The characteristics of suspension
elastic elements (i.e., spring, damper and anti-roll bar) are
considered as design variables. For handling, the objectives are
defined by the measurements from multi-body dynamics simulation of
typical double lane change according to ISO3888 standard. For ride
comfort, the frequency-weighted RMS (Root Mean Square) value of
vertical acceleration of the front seat rail according to ISO2631
standard is set as the objective. The optimization methods which is
suitable to the multi-objective trade-offs in vehicle development
are discussed, and some simulation results about the cooperative
optimization between handling & ride comfort are presented in
this paper.