Due to the rapid development in industry, rotor bearing systems such as motors, jet engines, pumps, turbines, and auto engines usually subject to high speed in order to achieve a high productivity request. In high- speed rotor-bearing systems, the unbalance and eccentricity which produced by manufacturing errors cause undesirable vibrations. The most dangerous of these vibrations are excessive lateral and torsional vibrations, which can lead to damage in bearings, seals, lubrication systems and therefore lead to a complete failure of the rotating machinery and therefore, affect the normal operation of the rotor-system. In this projec a novel method is introduced finite element analysis to enhance the stability of a Multi Rotor System