自适应PID温度控制系统的研究

发布时间：2018-03-02 18:48

本文选题：PID　切入点：模糊控制　出处：《长春理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：基于TEC的自整定PID温度控制系统具有结构简单,控温精确等特点,被广泛应用于国防,医疗,科研等领域。然而在外界环境温度发生变化时不但导致受控对象温度发生变化,更直接影响散热器的温度并导致TEC温度变化,使得系统原本参数需要调整,自整定PID控温系统在整定过程中,不但容易引起受控对象的温度波动,也需要一定的温度收敛时间,影响了整个系统的稳定性。针对此问题,本文基于嵌入式系统设计出带有双温度检测功能的自适应PID温度控制系统。该系统通过两个温度传感器同时对散热器和受控对象的温度实时监测。当散热器的温度变化时,控温系统能根据散热器的温度快速确定适当参数,从而减小了在参数整定过程中的温度波动和整定耗时。经测试表明,本文系统在温度变化过程中能将温度控制在±0.2度以内,相比于模糊PID控制,本文系统温度波动更小,且能更快地达到稳定状态。
[Abstract]:Self-tuning PID temperature control system based on TEC is widely used in national defense, medical treatment, scientific research and other fields because of its simple structure, precise temperature control and so on. More directly affect the radiator temperature and lead to the TEC temperature change, make the original parameters of the system need to be adjusted, the self-tuning PID temperature control system in the setting process, not only easy to cause the temperature fluctuation of the controlled object, but also need a certain temperature convergence time. Affect the stability of the whole system. In this paper, an adaptive PID temperature control system with dual temperature detection function is designed based on embedded system. The system monitors the temperature of radiator and controlled object simultaneously through two temperature sensors. The temperature control system can quickly determine the appropriate parameters according to the temperature of the radiator, thus reducing the temperature fluctuation and setting time in the process of parameter setting. The test results show that the temperature of this system can be controlled within 卤0.2 degree in the process of temperature change. Compared with fuzzy PID control, the temperature fluctuation of the system in this paper is smaller, and the stable state can be achieved more quickly.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273

【相似文献】