模糊PID控制在光电跟踪控制系统中的应用

Application of fuzzy-PID control in system of photo-electric tracking

频率特性法和PID控制是光电跟踪控制系统中普遍采用的方法,对于稳态过程它们具有良好的控制性能,但对控制环境以及目标状态发生较大变化时却无法处理。介绍一种既能改善控制系统的过渡过程、减小超调量,又能保证系统跟踪精度的模糊PID控制算法,并给出了相应的实验数据。实验结果表明,模糊PID控制可显著改善控制系统对高速动态目标的捕获跟踪能力,提高跟踪精度,增强系统的鲁棒性。

Frequency characteristics and PID control, performing well for steady-state process, are widely adopted in the real-time control of photo-electronic tracking system, however they do not adapt to various variation of environment and sharply changing of target status. This paper presented a fuzzy PID control method, which shortened the transient time, reduced the overshoot and enhanced the tracking accuracy. Matlab simulation and experiment were carried out to verify effectivity of the method The result shows that it helps to advance the ability to track the high-speed target, improve the tracking accuracy and robustness of control system.