基于S7-200高精度定量阀控制器的改进研究

Improvement of High-precision Quantitative Valve Controller Based on S7-200

关键词:  高精度定量阀  恒频脉冲控制算法  梯形曲线算法  S形曲线算法  细分驱动技术

Key Words:high-precision quantitative valve  constant frequency pulse control algorithm  trapezoidal curve algorithm  S curve algorithm  subdivided driving technology

摘要:分析定量阀结构和控制原理，将传统的恒频脉冲控制算法与梯形曲线算法、S形曲线算法进行了对比，选择用拟合S形曲线的算法控制定量阀。同时，为了有充足加减速过程，使用细分驱动技术，在不增加控制器硬件成本前提下，通过拟合7段S形曲线，最终实现了高精度定量阀的精密定位控制。

Abstract:This paper analyzed the structure and control principle of quantitative valve. After comparing the traditional constant frequency pulse control algorithm, with the trapezoidal curve algorithm, and S curve algorithm, fitting S curve algorithm was close to control the quantitative valve. At the same time, in order to have enough acceleration and deceleration process, the subdivided driving technology was applied, by fitting 7 segments S curve and without increasing hardware cost was realiged, the precision positioning control of high-precision quantitative valve was realized．