Dynamic drift control strategy under extreme conditions
We focus on the stability control of rear-wheel-drive vehicles under extreme drifting conditions,aiming to broaden the boundary of vehicle control domains based on traditional chassis control strategies.With thorough considerations of conventional driving strategies on straight or small-curvature sections and extreme drift control strategies on large-curvature sections,we propose a dynamic drift control strategy for dynamic drift scenarios by adopting a control mode switching strategy integrating both.It primarily comprises a conventional driving strategy based on lateral LQR and longitudinal feedforward-feedback control,a drift control strategy based on MPC,and a control mode switching strategy based on the desired yaw rate.Our simulation results demonstrate our strategy enables the vehicle to switch between conventional driving control modes on straight and small-curvature roads and drift control modes on large-curvature roads.It also allows the vehicle to navigate smaller turning radii without compromising speed.Compared with the conventional driving,our drift control strategy performs U-turns faster with less lateral deviation.When navigating tight curves,the vehicle employing our drift control strategy exhibits much greater maneuverability and a more flexible posture.
active drift controlmotion controldrift strategy analysiscontrol strategy switching
国家科技期刊平台
NSTL
万方数据
