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Controlling a Shape Memory Alloy Two-Bar Truss Using Delayed Feedback Method
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DOI：10.1142/S021945541440032X.png)
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Abstract
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This work discusses the use of chaos control in smart structures. An archetypal model of a shape memory alloy (SMA) two-bar truss is treated. This system exhibits both constitutive and geometrical nonlinearities presenting a complex nonlinear dynamics response including either the snap-through or the chaotic behaviors. A constitutive model that presents a close agreement with experimental data is employed to describe the themomechanical SMA behavior. A variation of the continuous time-delayed feedback method is employed as a control strategy. This variable structure controller is applied to the stabilization of unstable periodic orbits of the SMA structure avoiding the snap-through behavior.
Keywords:
Nonlinear dynamics
von Mises truss
shape memory alloys
pseudoelasticity
chaos control
bifurcation control
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