Cooperative Coevolution Fuzzy Control of MR Damper for Damage Reduction of Structures

In this research, damage reduction of structures is studied using semi-active control of MR dampers. Fuzzy control is an intelligent control method in contrast to classical control with some specific capabilities such as handling non-linear and complex systems, adaptability and robustness to errors and uncertainties. However, due to lack of learning ability of fuzzy controller, it is used in combination with a genetic algorithm, which in turn suffers from some problems like premature convergence around an incorrect target.Therefore, in this research, the introduction of the cooperative coevolution fuzzy controller in which the parameters of membership functions and rules will be searched in two separate species. To investigate and compare the performance of this controller with some other controllers, these methods are implemented on a three story benchmark nonlinear structure. The results showed that the performance of the cooperative coevolution fuzzy controller is better than the other controllers and can reduce the average damage of the structure up to %79.