Besides the equilibrium and periodic solution, the almost periodic solution, which sometimes appears as quasi-periodic solution, is also a long term regular motion of nonlinear system.
非线性系统的长期规则运动除了平衡点和周期解以外，概周期解，或有时表现为拟周期解也是一种长期规则运动。
In this paper, we obtain the existence, uniqueness and the convergence of a periodic solution of the full system for general nonlinear systems under asymptotically stable conditions.
本文针对一般非线性系统，在渐近稳定的条件下，得到了完全系统的周期解的存在性、唯一性及收敛性。
Finally, the periodic and chaotic motions of a nonlinear vibration-isolation system for on-board machinery are investigated.
最后以船舶机械非线性隔振系统为例，分别分析了该改进方法在系统呈现周期运动和混沌运动时的应用。
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