基于PID控制的半导体激光器温度控制系统的设计

The design of thesemiconductor laser temperature control system based on PID control

针对传统的PID控制在温控系统的应用中存在调节时间较长和超调量较大的问题,本文利用实际温度与设定温度的偏差和偏差的变化率来动态调整控制参数,并设计了一套基于PID控制的半导体激光器温度控制系统。首先,介绍了系统的总体结构,采用单片机、高精度热敏电阻和TEC半导体制冷器作为系统的处理器、温度敏感器和温控的执行器件;然后,建立了温控系统的数学模型,对传统的PID控制算法进行了改进;最后,利用仿真实验和系统实验对其进行验证,并与传统的PID控制算法进行了定性和定量的比较。实验结果表明,改进的PID控制算法缩短了调节时间,超调量减小了90%,控制精度达到±0.05℃,控制效果明显优于传统的PID控制系统。

Aiming at the existing problems of long regulation time and large overshoot in the application of temperature control system in the traditional PID control,a semiconductor laser temperature control system based on PID control is designed,which uses the deviation and deviation change rate of actual temperature and setting temperature to dynamically adjust the control parameters. Firstly,that paper introduces the overall structure of the system by using single- chip microcomputer,high precision thermistor and TEC semiconductor refrigerator as the executor system processor,temperature sensor and temperature control. And then,that paper establishes the mathematical model of temperature control system by improving PID control algorithm of the traditional. Finally,that paper validates the system by experiment and simulation,and compares with the traditional PID control algorithm by qualitative and quantitative.The results indicate that this system reduces settling time,and the overshoot is reduced by 90%,the temperature control accuracy of ± 0. 05°C,is superior to the temperature control system based on the traditional PID control algorithm.