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半导体激光器输出波长随温度变化而变化,为了使半导体激光器稳定工作,要保持它的温度稳定,而温度PID控制效果与其比例、积分和微分三个参数密切相关,采用粒子群算法对半导体激光器温度PID控制系统参数进行优化,选取控制误差绝对值时间积分函数(ITAE)作为适宜度函数,并与Ziegler-Nichols算法整定参数进行比较。仿真结果表明,这种优化算法加快了收敛速度,实验中调节时间由150s降到50s,超调量由18%降到4%,有效改善了系统的动态性能。
The output wavelength of the semiconductor laser varies with temperature. To keep the semiconductor laser stable, the temperature of the semiconductor laser must be kept stable. The effect of the temperature PID control is closely related to the three parameters of the proportional, integral and differential. The particle swarm optimization algorithm is used to measure the temperature of the semiconductor laser, The control system parameters are optimized. The ITAE is selected as the fitness function and compared with the Ziegler-Nichols algorithm tuning parameters. The simulation results show that this optimization algorithm can speed up the convergence rate. The experimental time is reduced from 150s to 50s, and the overshoot is reduced from 18% to 4%, which effectively improves the dynamic performance of the system.