Passive and active vibration isolation of manually controlled axial piston pumps

This study considers vibration isolation techniques to diminish the high frequency vibratory forces experienced by operators of manually controlled axial piston pumps. A passive and an active vibration isolation technique were tested experimentally with an Eaton light duty manually controlled piston pump. Force attenuations as high as fourteen were achieved with the passive system. The active system did not produce significant force attenuations. There is strong evidence that Coulomb friction in the active system causes its poor performance. Further development will be needed to determine the validity of the active system concept. This paper includes a review of potential vibration isolation concepts for this application, details of the experimental test setup and experimental results from both the passive and active system tests.