Consideration on flow disturbance suppression and transmissibility reduction for pneumatic anti-vibration apparatuses under a multi-loop control system

This paper considers the compensation of flow disturbance, which is the pressure variation of compressed air supplied to pneumatic anti-vibration apparatuses. In the case of single-loop control system, a notch filter is used as the tunable parameter of repetitive controller so as to reduce the transmissibility of pneumatic anti-vibration apparatus. On the other hand, in the case of multi-loop control system, the transmissibility is increased. To overcome this problem, a sky-hook spring approach is employed. It is shown that by using the proposed approach, the vibration caused by flow disturbance is attenuated and the transmissibility of pneumatic anti-vibration apparatuses is improved