An Active Seat Controller with Vehicle Suspension Feedforward and Feedback States: An Experimental Study

[...]of the complexity associated with the pneumatic system and its limited frequency response, the active system was only effective in reducing vertical vibration at low frequencies, less than 4 Hz and did not perform well at higher frequencies that can cause significant discomfort. [...]it is an important issue from both a cost and reliability point of view to develop an active seat suspension with a controller that requires only accessible and inexpensive system states. [...]of the improved attenuation of the seat acceleration, the controllers increased the travel of the seat suspension which, itself, is physically limited [26,27] and, consequently, both the suspension travel and actuator force limitations were included in the optimization process. [...]in this study, the fitness function that was used in the gain optimisation process was based on the seat effective amplitude transmissibility (SEAT) factor, which is defined as the ratio between the acceleration at the seat to that at the base of the seat [1].