The usual way of modeling an electropneumatic servodrive system consists of supposing the homogeneity of the flow parameters in the cylinder. In order to study the influence of the transmission line effects on the dynamic behavior of a long pneumatic rodless cylinder, a generalized one-dimensional distributed parameter cylinder model is presented. The proposed numerical scheme combining the finite difference and the “characteristics” method enables the simulate of a long rodless cylinder by taking into account the servovalve boundary conditions and the piston movement. The simulated results are compared with experimental results.

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