Active vibration control of a dynamic absorber using fuzzy algorithms

The design and construction of a dynamic absorber incorporating active vibration control is described. The absorber is a two-degree-of-freedom spring-lumped mass system sliding on a guide pillar, with two internal vibration disturbance sources. Both the main mass and the secondary absorber mass are acted on by D.C. servo motors to suppress the vibration amplitude. A fuzzy control algorithm is used to control this multi-input/multi-output (MIMO) system. According to the characteristics of the system dynamics, the membership fuctions and the fuzzy rules are decided. Then a conventional fuzzy controller and a decoupling fuzzy controller for the MIMO vibration system are designed. Finally, the results of some experiments are presented. The experimental results show that the system is effective in suppressing vibration. The performance of this control strategy for position tracking control is evaluated based on experimental data. Copyright (C) 1996 Elsevier Science Ltd.