Abstract: Aiming at the function of accumulator absorbing hydraulic pulsation, on the basis that the influence of the joined-pipeline and oil-in is ignored, the air cavity’s stress is analyzed and the accumulator is divided into gas cavity, bladder, and oil cavity, the second-order mathematics model of the accumulator is established. Simulation model of the accumulator is establashed by Matlab/Simulink®. The simulation work has been done. The experiment systems are upbuilt separatly in hydraulic system of reeling machine and high-speed bar cutter machine, and the cybernation and acquisition are finished with dSPACE. The experiment work is put up. After comparing the numerical data of the simulaiton and experiment, the accuracy of the model is verified. And the conclusions, i.e. when accumulator absorbs pressure pulsation, selection of the charged pressure should be finished by the principle that the damping ratio is optimum in the model, are drawn.

Key words: Absorbing hydraulic pulsation, Charged cubage, Charged pressure, Mathematics model, Principle of parameter choice, Exechon, Parallel kinematic machine, Stiffness modeling, Substructure synthesis