Optimal observer control of quarter car model with active suspension

Trasportation demands for today has led to a significant growth in automotive industry as a results of technological developements. Moreover, improved road conditions helped driving safety and comfortability gained considerable importance. It is fact that suspension and proper control strategy play major role in minimization of mechanical vibration for vechicle traction, braking and comfort. Passive, semi active and full active techniques are partially studied fort his investigation and state space modelling strategy was implemented on the ¼ vechile model The system was analysed in terms of its stability, observatibilty and controlability and next it was fixed to predetermined root values after calculating state feedback coeffiecients. These state feedback coefficients were then improved by optimal control strategies. State measurements of a system output may not be possible for state feedback all the time. In this case, Luenberger observatory was employed to compute state variables through observing system inputs and outputs. For output coefficients of this observer, the optimal control system was designed by choosing the coefficients previously determined by optimal control strategy. The proposed system was modelled in MATLAB/SIMULINK environment by applying disturbance road input and system output was observed.