History of engineering and technology 5 Technology: general issues 5 Vibration control 5 system identification 5 Active vibration controls 4 Research & information: general 4 particle swarm optimization 4 Flexible plate structures 3 Flexible structures 3 History of engineering & technology 3 Particle swarm optimization (PSO) 3 Plates (structural components) 3 active vibration control 3 vibration control 3 Active vibration control 2 Civil engineering, surveying & building 2 Controllers 2 Derivative controllers 2 Flexible structure 2 Mathematics & science 2 Mean square error 2 Mechanical engineering & materials 2 Physics 2 System identification techniques 2 Vibrations (mechanical) 2 flexible plate 2 intelligent controller 2 ABC 1 ACTUATOR 1 ALGORITHM 1