在织造过程中，经、纬纱张力是非常重要的参数，必须加以控制。

In weaving, the warp and filling tensions are very important factors and have to be controlled.

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纬纱张力系统是一个非线性、时变的系统，针对这一特点，采用模糊pid算法进行伺服控制。

Tension of warp system is time-variant and nonlinear system. According to characteristic of tension of warp system, Fuzzy-PID algorithm is adopted.

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当钢筘从织口处后退时，由于经纱使纬纱屈曲而产生的纬纱张力会使织物在织口处沿宽度方向收缩。

As the reed moves away from the fell, the cloth at the fell will contract width way under the influence of the tension in the weft produced by the effort of the warp to crimp it.

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