摘要
为改善温控系统的性能,提高PID控制算法的适用范围,提出了一种基于STM32微处理器为控制核心,铂电阻 Pt1000和MAX31865构成温度采集电路,半导体制冷器 TEC和H 桥逻辑驱动电路实现对温度的调节,上位机通过无线传输电路接收实时的温度数据进行PID调节,将调节输出值发送给下位机软件实现一次闭环的温度调节控制。此外,使用基于微分器的PID控制算法实现系统的温度的调节,该方法不仅对输入信号进行高频滤波,同时得到输入信号的微分信号,具有处理携带噪声的输入信号的能力。实验结果表明,基于微分器的PID控制算法相比于常规的位置式PID、结合Bang-Bang控制的PID、微分先行的PID、步进式PID及变积分PID具有系统响应速度快、超调量小、误差小、鲁棒性等特点,提高了系统的动态性能,在工程温度控制方面具有一定的实用价值和应用价值。
In order to improve the performance of temperature control system and the application scope of PID control algorithm,the control core based on STM32 microprocessor is designed,and platinum resistance PT1000 and MAX31865 are used to collect temperature.Semiconductor cooler TEC and H bridge are performed to adjust the temperature.The computer software transfers the real-time temperature data through wireless communication and the output PID value is sent to the control core to achieve a closed-loop temperature control.Besides,the PID control algorithm based on differentiator is used to adjust the temperature of the system,which not only filters the input signal with high frequency,but also obtains the differential signal,and has the ability to process the input signal with noise.The experimental results show that the PID control algorithm based on differentiator has fast response,smaller overshoot,smaller error and robustness compared with the conventional position PID,PID combined with Bang-Bang control,differential first PID,step-by-step PID and variable integral PID.It improves the dynamic performance of the system and has the practical and application values in engineering temperature control.
作者
姚立平
刘伟章
吴文明
黄德群
陈军
顾珩
YAO Li-ping;LIU Wei-zhang;WU Wen-ming;HUANG De-qun;CHEN Jun;GU Heng(Institute of Medicine and Health,Guangdong Academy of Sciences,Guangzhou 510500;College of Mathematics and Informatics,South China Agricultural University,Guangzhou 510642)
出处
《环境技术》
2021年第6期120-125,共6页
Environmental Technology
基金
广东省科技厅科技计划项目(2019A050510026)
省基-面上项目(2020A1515010954)
省重点领域重大项目(2018B090904004)
广东省科学院科技计划(2021GDASYL-20210103028,2020GDASYL-20200402002,2021GDASYL-20210102012,2018GDASCX-0103)
中国博士后科学基金面上项目(2020M6823631)。
关键词
温控系统
半导体制冷器TEC
PID控制算法
动态性能
temperature control system
semiconductor refrigerator TEC
PID control algorithm
dynamic performance
