Abstract: The stability robustness for uncertain system models of elastic vehicles is studied in time-domain. A criterion for measuring stability robustness of system is obtained by analysing the stability robustness of output feedback regulator control system of elas-tic vehicle. A concept on measure of stability robustness to show an inherent quality of system is also defined.Finally, optimal stability robustness synthesis of system is presented by dislocating the actuator/sensor position and adjusting feedback law.A method for elas-tic vibration suppression is given too.

Key words: time-domain, control system of elastic vehicle, stability robustness.