On the nonlinear dynamics of a thermomechanical shape memory alloy oscillator excited by ideal or non-ideal energy sources

When the excitation is not influenced by the response, it is called ideal or ideal en-ergy source. On the other hand, when an excitation is influenced by the system response, it is known as non-ideal. This paper discusses the nonlinear responses of a shape-memory non-ideal oscillator, with an unbalanced motor of excitation with limited power supply. The re-storing force provided by the shape-memory device is described by a thermomechanical mod-el capable to describe hysteretic behavior via the evolution of a suitable internal variable. Computer simulations are carried out via a numerical approach showing qualitative results concerned with regular and non-regular motions, and comparing with those obtained for the reference ideal system.