Design of fuzzy controller for smart structures using genetic algorithms

Abstract

In this paper, the genetic algorithm is used to optimize the membership functions of a fuzzy logic controller for smart structure systems. With the performance requirement of vibration control, a new encoding method and a fitness function with variable factors are put forward for the genetic algorithm. A constraint problem, which the new encoding method will face, is discussed and solved. The effectiveness of the genetic algorithm is demonstrated with a cantilever beam attached with piezoelectric materials.

Classification and Learning Using Genetic Algorithms

“…Xue et al [502] have also studied the application of genetic algorithms for optimization of fuzzy systems in prediction and control. Genetic algorithms are used in [285] to optimize the membership functions of a fuzzy logic controller for smart structure systems. A new encoding method and a fitness function with variable factors are proposed.…”

Hybrid control of vibrations of a smart von Kármán plate

“…Fuzzy control is a suitable tool for the systematic development of nonlinear active control strategies and can be fine-tuned if no experience exists or if one designs more complicated control schemes [11][12][13]. The techniques provided by the classical control for a design of nonlinear controllers are not developed well.…”

Experimental Demonstration of H∞ Control based Active Vibration Suppression in Composite Fin-tip of Aircraft using Optimally Placed Piezoelectric Patch Actuators

“…Though there are several papers (Dosch and Inman, 1995;Bu et al, 2003;Lu et al, 2003;Hossain et al, 2004) describing active vibration control in simple structures such as rods, beams, and plates, the nature of forcing is either restricted to single frequency excitation; or to impulse/pulse excitation where even though all frequencies are excited initially, only the fundamental frequency dominates with the passage of time. This is very different from the real life situations, such as in the case of vibration of fin-tip of an aircraft executing complex maneuvers.…”