基于改进PSO的蝶形半导体激光器温控系统的设计

Design of Temperature Control System for Butterfly Semiconductor Laser Based on Improved PSO

提出了基于改进粒子群优化算法(Particle Swarm Optimization,PSO)的蝶形半导体激光器温度控制系统。利用蝶形半导体激光器内部热电冷却器(Thermo-Electric Cooler,TEC)作为被控对象求出其传递函数,并在Simulink仿真工具中搭建温度控制系统仿真模型,分析温度对激光器工作的影响。基于改进PSO算法来优化比例积分微分(Proportional-Integral-Derivative,PID)控制器参数以达到良好的温度控制效果。实验结果表明,通过将改进PSO算法优化后的PID控制器参数应用到温控电路,可以保证激光器在安全平稳运行的前提下,达到激光器TEC温控系统稳定性高、响应速度快的目标,2 h内温度最大浮动误差为0.13℃,温度稳定性提升至0.52%。

In order to ensure the stability of the operating temperature of a butterfly shaped semiconductor laser,a temperature control system based on improved particle swarm optimization(PSO)was proposed.The internal TEC(Thermo Electric Cooler)of the butterfly shaped semiconductor laser was used as the controlled object to calculate its transfer function.A temperature control system simulation model was built in Simulink simulation tool to analyze the impact of temperature on the laser operation.Based on the improved PSO algorithm to optimize PID(Proportional Integrated Derivative)controller parameters to achieve good temperature control effect,the experimental results showed that optimizing PID controller parameters through the improved PSO algorithm could ensure the safe and stable operation of the laser in the temperature control circuit,and achieve the goal of high stability and fast response speed of the laser TEC temperature control system.The maximum temperature fluctuation error within two hours was 0.13℃,and temperature stability increased to 0.52%.