闭环控制经编送经系统

经编机送经控制系统是一个时刻发生变化的非线性系统，针对经编生产，特别是高速经编机生产要求，送经系统应具有快速响应性、高控制精度和稳定性的特性，为此设计了采用闭环控制的经编送经系统。主要介绍该系统的原理、方法和组件构成，以及对系统的测试分析方法。系统采用DSP数字控制器作为送经控制单元的核心部件，通过测速压辊得到经轴盘头的即时外周长和实际送经量，获取下一周期经轴电动机速度，根据送经量的偏差，再通过控制器的智能PID计算、修正，形成全闭环控制来实现送经系统的实时在线调整。对比实验结果表明，设计的经编送经闭环系统合理、可行，并具有高精度、响应性和稳定性。

Application of closed loop control on warp knitting of let-off system

The warp knitting machine control system is a nonlinear system at a time of change for the warp production. It is required to have fast response, high control accuracy and stability, particularly to high-speed warp knitting machine. The ststem was designed on the basis of the closed loop control of the let-off system of a warp knitting machine. The principle, method and components were introduced in this paper. The DSP digital controller is created as a warp core component of the control unit. It is showed that the beam motor speed for the next period is obtained by measuring wia a feedback roller. Besides to achieve the let-off system of real-time online adjustments, it is calculated and corrected in intelligent PID controller according to the deviation of amount of let-off. When a is made, it is concluded the system possesses the nature of high accuracy, response and stability.