基于滑模控制投影混沌同步在隔振系统中的应用研究  

Application of projective synchronization to vibration isolation system based on sliding mode control

作　　者：曾强洪[1] 朱石坚[1] 楼京俊[1] 张星[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《振动与冲击》2010年第12期114-117,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50675220)

摘　　要：线谱是潜艇辐射噪声谱中最显著的特征,即使在潜艇以低速航行,产生最低的噪声辐射的情况下也可以探测到。利用混沌的宽频特性来降低潜艇辐射噪声线谱,提高其隐身能力已被广泛研究,但由于混沌的内在不确定特性,当系统处于混沌状态时,整体隔振性能不能得到保证。提出应用滑模变结构控制实现隔振系统和混沌系统投影同步的新方法,在保持原有隔振系统隔振性能的前提下有效的消除了线谱。该方法不用计算Lyapunov指数,且对参数失配具有很强的鲁棒性。通过对两自由度隔振系统和Duffing方程的数值仿真,验证了该方法可成功消除线谱且明显改善隔振系统的隔振性能。The potential of chaotifying vibration isolation systems to reduce line spectra of radiated noise of underwater vehicle and improve its capability of concealment has recently reported.It was noticed that for an isolation system,the amplitude of chaotifying vibration is,in general,larger than that of its specified periodic motion,which is subject to the inherent characteristic of chaotic behavior.A new method based on the sliding mode control was advanced to realize the projective synchronization between the two-degrees-of-freedom vibration isolation system and the chaotic system.The presented method can effectively eliminate the linear spectra based on chaotifying vibration responses and the capability of vibration isolation.The effectiveness of the proposed scheme was validated by numerical simulations.The simulation results show that linear spectra is reduced and the vibration amplitudes of isolated equipment is proportionally mitigated simultaneously.The method need not calculate Lyapunov exponent and the proposed controller takes on strong robustness against parameter uncertainty and influence of measurement noise.

关 键 词：投影同步 隔振 线谱 滑模控制 

分 类 号：O322[理学—一般力学与力学基础]