Abstract
The performance characteristics of vehicle suspension systems based on two alternative forms of control law are studied, evaluated, and compared with those of the pertinent semi-active counterparts and passive suspension systems. A two-dimensional four degree-of-freedom linear vehicle model, subjected to random roadway irregularities, is adopted. Time delays inherent in the feedback loops are included. The particular combinations of state variable values of interest are derived using linear optimal control theory for both active and semi-active systems.