Sliding Mode Control of Truss Bridge Structure with GMMAs

using sliding mode control and genetic algorithms, in this paper, a new optimal active control strategy is presented for truss bridge structure installed with giant magnetostrictive material actuators (GMMAs). The precise location information of GMMAs is determined using genetic algorithm, an active sliding control law is proposed based on the Lyapunov function method, and the real control force is provided by the GMMA via input current. A 32m span steel truss bridge structure subjected to El Centro earthquake record is provided to testify the effectiveness of the proposed control strategy. Simulation results show that (a) the GMMA is an effective vibration absorber and (b) the optimal active control strategy presented in the paper is feasible and effective for the reduction of vibration response quantities of the truss bridge structure subjected to ground motion.