Digital control systems based on Matlab/Simulink software for strength machines

Abstract

This paper presents the stands for strength tests of materials and structures with digital control systems, designed and built at the Department of Mechanics and Machine Design, Opole University of Technology. The authors described electrohydraulic strength stands for tests under uniaxial tension – compression, biaxial tension – compression of cruciform specimens, and electromechanical stands for tests under cyclic bending and torsion with phase shift, and under polyharmonic bending with torsion. Fatigue tests which could be performed on these stands as well as algorithms of controllers were presented.

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“…Since then, many successful works in industrial and academic fields have explored this field further, making popular the usage of fuzzy models. Although fuzzy modeling provides an effective solution for real-life plants that are complex, uncertain and illdefined, it lacks available mathematical theories and systematic designs (Lin JW, 2011Lin ML, 2009-b, 2012aLiu KC, 2010;Liu KC et al, 2012;Liu KFR, 2009Liu TY et al, 2011Macha et al, 2012;Mahmoud, 2012;Manna, 2012;Shen et al, 2011;Shih CH et al, 2010Shih BY et al, 2010a-c, 2011a-c, 2012aSumathi, 2011, 2012).…”

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“…Following this, a decoupled adaptive neural network controller is derived at the same time to stabilize and control the system. In the end, an example, in the form of a numerical simulation, is provided to demonstrate the effectiveness of the control methodology, which is displayed to rapidly and efficiently control nonlinear multi-variable systems (Chen CW, 2004;Liu, 2010;Liu KC et al, 2012;Liu KFR, 2011;Liu TY et al, 2011Macha et al, 2012;Mahmoud, 2012;Manna, 2012;Shen et al, 2011;Shih CH et al, 2010Shih BY et al, 2010a,b, 2011a-e, 2012aSoundarrajan andSumathi, 2011, 2012;Su et al, 2011;Tang et al, 2011). automated the conditionbased maintenance process.…”

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“…The parallel parking management scheme addresses three issues: trajectory planning, decisional kernelling, and trajectory tracking management. The design of the control scheme is composed of several techniques: genetic algorithms, Petri nets, and fuzzy logic control (Lin CL et al, 2009;Lin ML, 2009Liu KC, 2010;Liu KFR, 2009Liu TY et al, 2011Lin JW, 2011Li et al, 2012;Liu KC et al, 2012;Macha et al, 2012;Mahmoud, 2012;Manna, 2012). It is the GA that is used to decide the feasible parking locations.…”