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。
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.
当系统发生粘滑运动时，系统响应随激励速度、系统刚度及阻尼的变化而呈周期、拟周期及混沌运动交替变化的形式。
When system is in stick-slip motion, the system response can be periodic, quasi-periodic and chaos with the change of pulling velocities, system stiffness and viscous.
系统响应通向阵发性混沌的道路有通过拟周期响应，也有通过周期响应进入，且响应在进入阵发性混沌区前一般都有幅值增大的现象；
The response routes to chaos are generally from period or quasi period to intermittent chaos. The response amplitude will increase before chaos beginning.
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