Effect of feedback measurement on LQG control for Low Bandwidth Active Suspension system

Conventional suspension system is now considered to have an unsatisfying limitation in terms of all-condition performance. Selection of certain spring and damper value is preferred to fail giving the admired response. Active suspension has been studied intensively in many years to diminish this problem. Low Bandwidth Active Suspension (LBAS) is shown to be more competitive to high bandwidth one when energy and cost aspects are taken into account. In this study, the effect of the measurement which is used for feedback in the LQG control of LBAS performance is analyzed. The achievable performance of the LBAS is shown by means of carpet plot and the simulation is conducted considering the road disturbance as a stationary random process.