Principal resonance response of a stochastic elastic impact oscillator under nonlinear delayed state feedback

• 作者: 徐伟 谢文贤 韩群 黄冬梅
• 来源期刊: 中国物理B（英文版）
• 关键词: elastic impact system time delay frequency island jump avoidance
• 年，卷（期）: 2015,（4）
• 页码范围: 040502-1-040502-10
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/4/040502

摘要

In this paper, the principal resonance response of a stochastically driven elastic impact (EI) system with time-delayed cubic velocity feedback is investigated. Firstly, based on the method of multiple scales, the steady-state response and its dynamic stability are analyzed in deterministic and stochastic cases, respectively. It is shown that for the case of the multi-valued response with the frequency island phenomenon, only the smallest amplitude of the steady-state response is stable under a certain time delay, which is different from the case of the traditional frequency response. Then, a design criterion is proposed to suppress the jump phenomenon, which is induced by the saddle-node bifurcation. The effects of the feedback parameters on the steady-state responses, as well as the size, shape, and location of stability regions are studied. Results show that the system responses and the stability boundaries are highly dependent on these parameters. Furthermore, with the purpose of suppressing the amplitude peak and governing the resonance stability, appropriate feedback gain and time delay are derived.