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A Digital Control System for the Hydraulic Fatigue Stand SHM 250b

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Abstract:

Unreliable and inflexible analog control systems of fatigue test stands applied in laboratories are being replaced by systems enabling easy development and implementation of new test ideas. This paper presents a digital control system applied in the fatigue test stand SHM 250b. It is based on a new electronic system and the I/O board RT-DAQ4/PCI with the software Matlab/Simulink used for communication with the board. The control system for the fatigue test stand SHM 250b gives the possibility of performing fatigue tests under controlled strain ε(t), stress σ(t) and energy parameter W(t) which is calculated from the stress and strain signals. The applied control system is now used, depending on the performed fatigue tests, and can be developed for specific needs of material strength analysis.

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Periodical:

Solid State Phenomena (Volume 113)

Pages:

39-44

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.113.39

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Online since:

June 2006

Authors:

J.R. Słowik, L.M. Kasprzyczak, Ewald Macha

Keywords:

Computer A/D and D/A Card, Digital Control System, Energy Control, Fatigue Test Stands, MATLAB/Simulink Software, Strain Control, Stress

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] The MathWorks, Simulink, Model-Based and System-Based Design, Version 5, (2002).

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[2] T. Łagoda, E. Macha: Multiaxial Random Fatigue of Machine Elements and Structures. Part III. Generalization of the Energy Criteria of Multiaxial Cyclic Fatigue to Random Loading (Studies and Monographs 104, Technical University of Opole, Opole. Poland 1998), p.196.

DOI: 10.1520/stp13504s

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[3] W. Będkowski, E. Macha, J. Słowik: The fatigue characteristics of materials with the controller strain energy density parameter (The Archive of Mechanical Engineering, Vol. LI, No 3, 2004), pp.437-451.

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