A new kind of optimal fuzzy PID controller is proposed, which contains two parts. One is an on line fuzzy inference system, and the other is a conventional PID controller. In the fuzzy inference system, three adjustab...A new kind of optimal fuzzy PID controller is proposed, which contains two parts. One is an on line fuzzy inference system, and the other is a conventional PID controller. In the fuzzy inference system, three adjustable factors x p, x i , and x d are introduced. Their functions are to further modify and optimize the result of the fuzzy inference so as to make the controller have the optimal control effect on a given object. The optimal values of these adjustable factors are determined based on the ITAE criterion and the Nelder and Mead′s flexible polyhedron search algorithm. This optimal fuzzy PID controller has been used to control the executive motor of the intelligent artificial leg designed by the authors. The result of computer simulation indicates that this controller is very effective and can be widely used to control different kinds of objects and processes.展开更多
针对分数阶PID(fractional order PID,FOPID)控制器的设计问题,提出一种基于自适应布谷鸟搜索算法的分数阶PID控制器参数整定算法。为改进经典布谷鸟算法的收敛速度与计算精度,并充分发挥全局搜索和局部挖掘两者各自的优势,采用了基于...针对分数阶PID(fractional order PID,FOPID)控制器的设计问题,提出一种基于自适应布谷鸟搜索算法的分数阶PID控制器参数整定算法。为改进经典布谷鸟算法的收敛速度与计算精度,并充分发挥全局搜索和局部挖掘两者各自的优势,采用了基于系统误差的自适应步长策略。为保证布谷鸟搜索算法初始化种群的均匀性,采用佳点集法初始化种群替代经典算法中的随机初始化种群。最后对2类系统进行仿真实验,并将实验结果与现有结果进行对比,验证了基于自适应布谷鸟搜索算法的分数阶PID控制器的设计和参数整定方法的有效性和优良性。展开更多
文摘A new kind of optimal fuzzy PID controller is proposed, which contains two parts. One is an on line fuzzy inference system, and the other is a conventional PID controller. In the fuzzy inference system, three adjustable factors x p, x i , and x d are introduced. Their functions are to further modify and optimize the result of the fuzzy inference so as to make the controller have the optimal control effect on a given object. The optimal values of these adjustable factors are determined based on the ITAE criterion and the Nelder and Mead′s flexible polyhedron search algorithm. This optimal fuzzy PID controller has been used to control the executive motor of the intelligent artificial leg designed by the authors. The result of computer simulation indicates that this controller is very effective and can be widely used to control different kinds of objects and processes.
文摘针对分数阶PID(fractional order PID,FOPID)控制器的设计问题,提出一种基于自适应布谷鸟搜索算法的分数阶PID控制器参数整定算法。为改进经典布谷鸟算法的收敛速度与计算精度,并充分发挥全局搜索和局部挖掘两者各自的优势,采用了基于系统误差的自适应步长策略。为保证布谷鸟搜索算法初始化种群的均匀性,采用佳点集法初始化种群替代经典算法中的随机初始化种群。最后对2类系统进行仿真实验,并将实验结果与现有结果进行对比,验证了基于自适应布谷鸟搜索算法的分数阶PID控制器的设计和参数整定方法的有效性和优良性。