Clarification of nonlinear characteristics for polygonal pattern formation phenomena in contact rotating systems and their application to prevention method

包括系统的非线性的分析模型能够确认系统的行为发生后的多边形图案形成现象。这一结果得到了实验验证，并证实了软弹簧行为与振幅响应跳跃现象的对应性。此外，我们开发的稳定性分析已被修改，可用于分析系统的稳定性，包括不同的延迟时间和有效性已通过比较传统方法的结果得到证实。

The analytical model including nonlinearity of system enables to confirm the behavior of system after occurrence of polygonal pattern formation phenomena. This result has been verified experimentally and correspondence of soft spring behavior and jumping phenomena of amplitude response has been confirmed. Additionally, our developed stability analysis has been modified to be available to analyze stabilities of systems including different delay times and the validity has been confirmed by comparing to results of conventional method.