由于卷绕系统是一个复杂的、非线性系统，收卷机的卷径时刻在变化，转动惯量也难以计算。张力调节器如采用传统的控制理论进行设计，不一定能获得很好的控制效果。
Because the rolling system is complicated, nonlinear, and its load is variable, if the tension controller is designed basing on the tradition control theory, we would not achieve good control effect.
成绞机上配置张力自动调节器，可使丝线张力均匀，络交网纹清晰，减少断头，使后道退卷良好。
Tension self-regulator fitted on skeining machine offers even yam tension, distinctive traversing network, less end breakage and favourable unwinding in the post stages.
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