基于模糊PID的磁柱式断路器温度控制系统

Fuzzy PID-based Temperature Control System for Magnetic Column-type Circuit Breakers

当前磁柱式断路器温度控制系统设计主要采用固定的控制参数,缺乏对温度变化的自适应调整,忽略了温度变化的非线性特性,导致系统控温的温度变化范围大,为此设计基于模糊PID的磁柱式断路器温度控制系统。首先,改用STM32F103R8T6处理器芯片和Pt100型温度传感器,软件设计部分采集磁柱式断路器的温度数据,为后续的温度控制提供基础数据。然后,设计模糊PID温度控制器,结合模糊逻辑和传统PID控制算法,以应对温度控制中的不确定性和非线性问题。最后,通过制定一系列的模糊规则,实现对温度的精确控制。测试结果表明:在2 h的控温期间,温度区间中的10个温控点的温度变化范围为0.0017~0.0043℃,均未超过0.005℃,控温稳定度高,运行状况良好。

The current temperature control system design for magnetic column-type circuit breakers mainly adopts fixed control parameters,lacking adaptive adjustment to temperature changes and ignoring the nonlinear characteristics of temperature changes,resulting in a large range of temperature variation.Therefore,a temperature control system for magnetic column-type circuit breakers based on fuzzy PID was designed.Firstl STM32F103R8T6 processor chip and Pt100 temperature sensor were introduced to replace conventional components,and the collected temperature data of magnetic column-type circuit breakers was used in software design to provide basic data for subsequent temperature control.Then a fuzzy PID temperature controller which combines fuzzy logic and conventional PID control algorithm is designed to address the uncertainty and the nonlinearity in temperature control.Finally a series of fuzzy rules are formulated to achieve precise temperature control.The designed system achieved during 2 h temperature control period a temperature variation within the range of 0.0017~0.0043℃for all the 10 control points,of which the difference did not exceed 0.005℃,indicating its high stability and satisfactory operation condition in temperature control of magnetic column-type circuit breakers.