Title :
Stochastic Resonance in a Harmonic Oscillator with Randomizing Damping by Asymmetric Dichotomous Noise
Author :
Jiang, Shiqi ; Feng Guo ; Zhou, Yurong ; Gu, Tianxiang
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
The stochastic resonance phenomenon in a harmonic oscillator with randomizing damping coefficient by asymmetric dichotomous noise is investigated. By using the random average method and Shapiro-Loginov formula, the exact solution of the average output amplitude gain (OAG) is obtained. It is applicable to a stable under-damped, critical-damped or over-damped oscillator. Numerical results show that OAG depend non-monotonically not only on the intensity and the correlation time but also on the asymmetry of the random damping in a stable oscillator in detail, that is, stochastic resonance occurs. The maximum OAG can be achieved in the proper noise. The effect of asymmetric dichotomous noise on OAG versus frequency is similar to decreasing the damping coefficient.
Keywords :
damping; harmonic oscillators (circuits); random processes; OAG; Shapiro-Loginov formula; asymmetric dichotomous noise; harmonic oscillator; output amplitude gain; random average method; randomizing damping coefficient; stochastic resonance phenomenon; Acoustical engineering; Analog circuits; Circuit noise; Damping; Noise level; Noise shaping; Oscillators; RLC circuits; Stochastic resonance; Strontium;
Conference_Titel :
Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on
Conference_Location :
Kokura
Print_ISBN :
978-1-4244-1473-4
DOI :
10.1109/ICCCAS.2007.4348225
