电阻点焊的变论域模糊控制方法

Variable universe fuzzy control methods for resistance spot welding

中文关键词  模糊控制  电阻点焊  自适应控制  变论域  伸缩因子

英文关键词  fuzzy control  spot welding  adaptive control  variable universe  extension-contraction factors

中文摘要

      为提高电阻点焊模糊控制适应性和稳定性差的缺点, 根据变论域控制理论, 提出了电阻点焊的变论域模糊控制方法. 首先, 讨论了变论域模糊控制的基本原理. 其次, 设计了输入隶属函数、输出隶属函数、模糊控制规则、伸缩因子, 开发了一种基于规范化因子的电阻电焊变论域模糊控制器, 并使用模糊规则选择变论域的伸缩因子,给出了算法实现的具体步骤. 最后, 进行了不同控制方案的实验研究, 分析了实验结果, 验证了该控制算法的优越 性.

英文摘要

      In order to enhance the adaptability and stability of resistance spot welding(RSW), the variable universe RSW control method is put forward based on the variable universe control theory. First, the basic theory of variable universe fuzzy control theory is discussed. Second, the inputting membership functions, the outputting membership functions, the fuzzy control rules and the extension-contraction factors are designed; thus, a fuzzy controller based on normalized factors is developed. The extension-contraction factors are selected according to the fuzzy rulers in proposed controller. The detailed calculation steps of the algorithm are given. Finally, a practical prototype is tested with different control methods. The test results are analyzed and discussed; and the advantages of the proposed control algorithm are verified.