针对传统恒张力机构的弊端，提出了一种新型恒张力机构。
A new tension_constant unit is presented in respect to shortcomings of traditional tension_constant unit.
分析了高速走丝线切割机使用重锤式恒张力机构存在的缺点，并详细阐述了两种新型的双贮丝筒恒张力控制装置是如何实现电极丝恒张力控制的。
The paper have analysis on the defect of HSWEDM which use gravity takeup. Detail analysis have been made on two new kind constant tension system of double canisters how to achieve constant tension.
介绍了复贴机卷绕机构恒张力控制的基本原理和数学模型，并提出了串级PID控制策略，运用计算机仿真工具MA TLAB及其SIMULINK进行仿真调试。
The paper presents the affixture machine winding tension control and deduced mathematic model. The cascade PID control system of testing components is used. It is simulated by MATLAB and SIMULINK.
介绍了复贴机卷绕机构恒张力控制的基本原理和数学模型，并提出了串级PID控制策略，运用计算机仿真工具MA TLAB及其SIMULINK进行仿真调试。
The paper presents the affixture machine winding tension control and deduced mathematic model. The cascade PID control system of testing components is used. It is simulated by MATLAB and SIMULINK.
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