Abstract
A model and an identification method appropriate for typical industrial, open-loop controlled, pneumatic systems are presented in this paper. The development of the mathematical model takes into consideration nonlinear flow through extended pneumatic circuits, direction dependent friction, dead volume in cylinder chamber, fittings and piping, leakage between actuator chambers, time delays due to valve switching and long lengths of tubing, polytropic temperature model and heat transfer. The identification method is evolved with a view to apply in industrial environments and takes careful consideration of flow characteristics of both charge and exhaust elements of the circuit. Model validation is presented for a standard double-acting asymmetric cylinder with different payloads. The results of the residual analysis indicate an improved system model in comparison to the published literature. The approach presented should therefore be useful in simulation-based design and analysis of pneumatic systems. It is also applicable in the development of servo-pneumatic systems.
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Harris, P.G., O’Donnell, G.E. & Whelan, T. Modelling and identification of industrial pneumatic drive system. Int J Adv Manuf Technol 58, 1075–1086 (2012). https://doi.org/10.1007/s00170-011-3447-7
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DOI: https://doi.org/10.1007/s00170-011-3447-7