nonlinear autonomous vibration 非线性自主振动
On the basis of phase space analysis about measured vibration signals, the characteristics of special nonlinear autonomous vibration about the structure included in the system were obtained.
在实测的振动信号相空间分析的基础上，得到系统所包含的结构振动的特殊非线性自主振动的特征。
The forced vibration of pendulum is described by four-dimensional phase space and the fourth order autonomous ordinary differential equation.
本文用四维相空间和四阶自洽常微分方程描写了单摆的受迫振动。
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