PHYSICALLY REALIZABLE FEEDBACK CONTROLS FOR A FULLY ACTIVE PREVIEW SUSPENSION APPLIED TO A HALF-CAR MODEL

An optimal preview type active suspension with feedback control based on easily measured relative displacements, velocities and acceleration s is proposed. Measurements relative to the road, except by the previe w sensor, are not required and the front and rear spring rates are qui te arbitrary. Also, state estimators or observers are unnecessary and as a practical alternative the body accelerometers may be replaced by load cells. The effects of preview on the performance, for a theoretic al step type road input and an analogous random road input, are descri bed. The definition of the optimum preview function, and its consequen t effects on performance, receives attention and an example is given.