Abstract
Stochastic resonance as an important physical phenomenon has experienced a strong development in many fields in these last years. This paper concentrates on an experimental study on the application of stochastic resonance in a mechanical vibration system. A cantilevered beam with one end magnetic is used, to perform as a bi-stable non-linear vibration system. Generally, nonlinear vibration can be resulted from the elastic force of the beam and the magnetic force, excited by an ambient vibration. The nonlinear vibration of the system becomes into bi-stable status through adjusting the distance of the two magnetic-irons. Moreover, an electromagnet generator was used to provide a weak periodical vibration for producing bi-stable stochastic resonance. The conditions of the occurrence of the bi-stable stochastic resonance were evaluated with the experiments. The results indicated that the mechanical vibration system is suitable to produce the bi-stable stochastic resonance under specific conditions. Furthermore, possibility of bi-stable stochastic resonance was also validated by the theoretical analysis of the model of the mechanical vibration system, and simulating processing was also demonstrated.
