摘要：The floating raft active vibration isolation system itself is a complex system with high nonlinearity, strong coupling, and multi-source excitations, so it is difficult to build a mathematical model and control the system. As an intelligent control method, the fuzzy control algorithm can provide an intelligent path for the active control of the complex floating raft system. In this article, the system identification method is adopted to establish the discrete transfer function mathematical models for the floating raft active vibration isolation system. And then for the purpose of simulation and experimental study, the fuzzy controller is designed based on dual inputs of the acceleration and its variation and single output of control voltage. Since the control effect cannot be optimized due to the fact that the quantization factors and scale factors are usually gained by trial and error method and the control rules are designed by expert experience, the quantization, scale factors, and control rules are simultaneously optimized by adopting the genetic algorithm in which hybrid coding is conducted for both real numbers and integers. The simulation and experimental results show that the fuzzy controller based on genetic algorithm is superior to the conventional fuzzy controller on vibration suppression effect.
关键词：The floating raft; active vibration isolation; system identification; fuzzy control; genetic algorithm
