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在分析已有混沌发生机构的基础上,结合混沌中的倍周期分叉现象,设计了一种新的混沌激振器。该激振器由2个偏心轮构成,2个偏心轮之间的约束由传统的光滑铰链改为沿圆形轨道滑动,从而使系统产生倍周期现象的条件大幅度放宽。建立了该混沌激振器的动力学模型,通过仿真试验分析其动力学特性。结果表明,较普遍应用的三连杆混沌激振器,该混沌激振器具有更强的混沌特性和更为宽松的参数选择,因而具有更大的使用范围。
Based on the analysis of existing chaos generating mechanism, a new chaotic vibration exciter is designed based on the doubling bifurcation in chaos. The exciter is composed of two eccentric wheels. The constraint between the two eccentric wheels is changed from the traditional smooth hinge to the circular orbit, which greatly relax the system’s condition of doubling period. The dynamic model of the chaotic vibration exciter is established, and the dynamic characteristics of the chaotic vibration exciter are analyzed through the simulation test. The results show that the more commonly used three-link chaotic exciter, the chaotic exciter has more chaotic characteristics and more relaxed parameter selection, which has a greater scope of use.