Optimization of PID controller parameters based on an improved artificial fish swarm algorithm

Yi Luo, Wei Wei, Shuangxin Wang
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引用次数: 15

Abstract

The artificial fish swarm algorithm is a new kind of optimizing method based on the model of autonomous animals. After analyzing the disadvantages of AFSA, an improved artificial fish swarm algorithm is presented. According to the ergodicity and stochasticity of chaos, the basic AFSA is combined with chaos in order to initialize the fish school. The improvement of the swarming behavior increased the precision of the algorithm. In the behavior of preying, the strategy of dynamically adjusting the parameter of step is presented in order to improve the convergence rate of the algorithm. This improved AFSA is applied in the optimization of the of PID controller parameters. The simulation results show that this improved AFSA algorithm is effective and better than the basic AFSA algorithm.
基于改进人工鱼群算法的PID控制器参数优化
人工鱼群算法是一种基于自主动物模型的新型优化方法。在分析了人工鱼群算法不足的基础上,提出了一种改进的人工鱼群算法。根据混沌的遍历性和随机性,将基本AFSA与混沌相结合,对鱼群进行初始化。蜂群行为的改进提高了算法的精度。在捕食行为中,为了提高算法的收敛速度,提出了动态调整步长参数的策略。将改进的AFSA算法应用于PID控制器参数的优化。仿真结果表明,改进的AFSA算法是有效的,并且优于基本的AFSA算法。
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