AN IMPROVED DYNAMIC MODEL OF PNEUMATIC ACTUATORS

Authors

  • J.-C. Maré Laboratoire de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
  • O. Geider Laboratoire de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
  • S. Colin Laboratoire de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France

Keywords:

pneumatic actuator, friction, pneumatic valve, gas chambers, dynamics

Abstract

An improved predictive model of pneumatic jacks is introduced in order to develop a component oriented model li-brary for the numerical prototyping of pneumatic actuators. First, the valve orifices model is derived from the ISO stand-ard as a function of the orifice opening. Then the gas chamber behaviour is modelled using a rigorous theoretical devel-opment of conservation laws. Consequently, no assumption is required concerning the evolution of the gas only being considered as ideal. A fix parameter convective model is found acceptable to define the heat exchange between the gas and the jack environment. Finally, a representation model of the internal jack friction is proposed including the influence of pressure and working quadrant on viscous and Coulomb effects. The simulation structure is then presented and the model is validated using a step by step procedure.

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Author Biographies

J.-C. Maré, Laboratoire de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France

JEAN-CHARLES MARÉ Mechanical engineer diploma from INSA Toulouse in 1982. He spent one year in industry as aerospace testbench engineer. Then, he joined the mechanical engineering department of INSA where he is now profes-sor. He got his Doctorate of Science in 1993 dealing with the modelling, simulation and control of electrohydraulic actuators. His research activity is focused on aerospace and automotive hydraulic systems.

O. Geider, Laboratoire de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France

OLIVIER GEIDER Master of Science in 1992 at the University of Science in Toulouse. Then, he joined the Laboratoire de Génie Mécanique as a Phd student. In 1997, he presented his Phd dealing with the modelling and control of a low cost pneumatic actuator. Since 1998, he is working as a project engineer on aircraft air conditioning systems at Liebheer Tou-louse.

S. Colin, Laboratoire de Génie Mécanique, Institut National des Sciences Appliquées de Toulouse, 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France

STÉPHANE COLIN Engineer diploma in 1989 from ENSHEEIT in Toulouse. He presented his Phd in 1992 dealing with the modelling and design of a linearised flapper valve. Since this date, he works as an assistant professor at the me-chanical department of the Toulouse Univer-sity of Science. In the Laboratoire de Génie Mécanique, he focuses his research activity on the modelling of microfluidics systems.

References

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Published

2000-10-01

How to Cite

Maré, J.-C., Geider, O., & Colin, S. (2000). AN IMPROVED DYNAMIC MODEL OF PNEUMATIC ACTUATORS. International Journal of Fluid Power, 1(2), 39–47. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/650

Issue

2000: Vol 01 Iss 2

Section

Original Article