浮筏的主动吸振控制实验研究

浮筏在低频减振方面存在较大不足,而这恰是主动减振的优势.将两者相结合,研究了浮筏的主动吸振控制问题.研制了一种主动吸振器,建立了以DSP F2812为核心的控制系统;提出了符号LMS算法,与广泛使用的滤波x-LMS等算法相比,该算法不需要精确的模型信息;在此基础上设计了自适应前馈主动吸振控制律,并在浮筏实验平台上进行主动吸振控制实验.实验结果表明,通过主动吸振控制,浮筏的低频减振能力得到了显著的改善.

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.