电光调制器偏置电压控制算法的研究

发布时间：2017-12-27 22:19

  本文关键词：电光调制器偏置电压控制算法的研究　出处：《长春理工大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 电光调制器 偏置电压 静态工作点 控制算法

【摘要】：如今,电光调制技术在光通信领域中应用广泛。电光调制器是用来完成将电信号加载于光这一过程的设备,它是基于电光效应原理工作的。电光调制器在调制信号时,其直流偏置电压的设定决定了其静态工作点。控制调制器工作在理想的工作点,才能保证信号不失真,完成线性调制。本文根据电光调制器的工作原理和工作时的要求,分析了工作点和偏置电压设定之间的关系,并且通过建立自动控制系统来实现对偏置电压的控制。着重分析了几种常见控制算法的特性,针对系统受到干扰时工作点的漂移和调制器控制中参量的特点,提出了不断处理偏差量实现控制偏压改进的逐次递推、分程逐次递推的自适应PID的控制算法。并分析了控制算法在调节过程中各个状态量转换关系。建立实验环境对算法进行验证。对比未加偏置控制算法和使用不同的控制算法控制透过率的结果。相比之下,逐次递推和分程逐次递推的自适应PID算法对稳定被控量起到了效果。其中,分程逐次递推的算法效果更好,可以在工作点产生漂移时,稳定其透过率值并保持工作点处于线性区中点。
[Abstract]:Nowadays, electro-optical modulation technology is widely used in the field of optical communication. An electro-optic modulator is a device used to complete the process of loading electrical signals to light. It works based on the principle of electro-optic effect. When the electro-optic modulator is modulated, the setting of the DC bias voltage determines its static working point. The control modulator works at the ideal working point to ensure that the signal is not distorted and the linear modulation is completed. According to the working principle and working requirements of electro-optic modulator, the relationship between working point and bias voltage setting is analyzed, and the control of bias voltage is realized by establishing automatic control system. Focuses on the analysis of the characteristics of several kinds of common control algorithm, characteristic parameter drift and modulator control for disturbance the working point of the proposed adaptive PID control algorithm to realize the control of successive processing deviation bias improved recursive and recursive process of successive. And the change relation of each state quantity in the control process is analyzed. The experimental environment is established to verify the algorithm. The results of the transmission rate are controlled by comparing the non biased control algorithm and using different control algorithms. In contrast, the adaptive PID algorithm with successive recursive and successive recursive recursive algorithms has the effect of stabilizing the controlled quantity. Among them, the step by step recursive algorithm has a better effect. It can stabilize the transmission rate and keep the working point in the middle point of the linear region when the work point is drifting.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN761
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本文编号：1343425