模糊PID在核酸提取工作站温控系统中的应用

Application of Fuzzy PID in Temperature Control System for the Nucleic Acid Extraction Station

针对常规PID温控方法难以满足核酸提取工作站对温度精度高、响应快、静态稳定性好的控制要求,提出了一种基于模糊PID的复合式温度控制策略,并在STM32硬件平台上实现。提出依据系统温差自动选择不同温控策略的复合式温控算法,分别设计其中的PID控制部分与模糊控制部分,通过与常规PID温控算法的实验对比,验证该算法对核酸提取工作站的适用性。实验结果表明:基于模糊PID的复合式温控算法具备了模糊控制动态性能良好、适应性强的特点,同时保留了常规PID控制静差小、静态稳定性好的优点。

In view of the fact that the conventional PID temperature control method is difficult to meet the control requirements of the nucleic acid extraction station which requires high temperature accuracy,fast response and good static stability,a composite temperature control strategy based on fuzzy PID is proposed,and realized on the STM32 hardware platform.This paper proposes a hybrid temperature control algorithm which can automatically select different temperature control strategies based on the system temperature difference.The PID control part and the fuzzy control part are designed respectively.Experimental results show that the hybrid temperature control algorithm based on fuzzy PID has the characteristics of good dynamic performance and strong adaptability of fuzzy control,while retaining the advantages of small static difference and good static stability of conventional PID control.