swing curve meaning in English

摆动曲线
摇摆曲线

Both complicated and simple model of transient stability analysis are integrated in the software , applying the model of each component to different degree of precision respectively . joined with the power system diagram editor , the transient stability analysis can be carried out in a graphical way . some auxiliary models are introduced , such as the classes of fault information and swing curves , etc . these models turn out to be essential to make the procedure of transient stability simulation vivid and intuitionistic , with the swing curves of different variables during the transient period being showed and printed conveniently
针对电力系统各元件模型的不同精确程度，采用成熟的数值解法实现了复杂模型的暂态稳定计算和简化模型的暂态稳定计算，并与已有的面向对象的电力系统图编辑器进行了很好的连接，实现了暂态稳定分析的图形化；实现了故障信息类、变化曲线类等辅助对象，使得整个暂态稳定仿真计算的过程形象直观，且能对暂态过程中各量的变化曲线进行方便地显示和打印输出。