Experimental Study of Active Absorption Control on Floating Raft System

Floating raft system has a huge disadvantage in depressing low-frequency vibration, which is the main problem of submarine’s hiding. However, the hot studied active vibration control in recent years is good at it. Based on the combination of two above, an active absorption control on floating raft system is proposed. A moving-magnetic type of active absorber is designed firstly, and the corresponding control system with hardware and software is established by using DSP F2812. Then, Signed-LMS algorithm, which is not dependent on model of studied object, is proposed. Thus, it is very suitable for active vibration control of floating raft system compared with other algorithms such as filtered x-LMS algorithm, for the accurate model of floating raft system is very difficult to get. Finally, the adaptive feedforward controller is designed on the basis of it, and some experiments are fulfilled. The Results shows that the ability of floating raft system at isolating low-frequency vibration is improved impressively by active absorption control.