Abstract
The active control of vehicle suspensions and steering systems in cornering on uneven roads is analyzed by means of LQR control theory, assuming that cornering forces depend on normal tire loads in addition to tire slip angles. The effectiveness of an active suspension, an active rear wheel steering and the integrated control of both systems is discussed in comparison with their contribution to the vehicle stability on curvy and random roads . By simulations of these active control systems under a preview driver control, it is furthermore confirmed that mauneverability is much improved for safer cornering along a desired curve on uneven roads.