柴油机双层隔振非线性系统主动隔振研究  

Active vibration isolation of diesel two-stage vibration isolation nonlinear system

作　　者：肖斌[1] 高超[1] 张艾萍[1] 刘志刚[2] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012 [2]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《振动与冲击》2015年第13期133-139,194,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51475088);吉林省自然科学基金资助项目(20140101065JC);吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2015]第244号)

摘　　要：针对柴油机双层隔振系统,考虑误差通道严重非线性影响动力系统建模、振动分析以及主动控制策略设计、隔振效果,在预补偿模型参考自适应逆控制的线性化算法基础上,集成自适应陷波算法,形成自适应复合控制策略。在柴油机双层隔振系统主动隔振试验中,基于Hammerstein型非线性系统解耦及基频广义频响函数分析,建立线性化参考模型及提取误差通道相频特性曲线,分析提出的自适应复合控制策略,结果表明:接近目标非线性系统的线性参考模型,能够获得好的线性化效果和提供精确的误差通道相频特性曲线,并与相频曲线FIR模型拟合一起,决定着自适应复合控制策略的隔振效果;而与系统能量建模结果对比表明,只有通过消除系统非线性来抑制其对谐频振动影响,才能获得最优的系统振动能量级隔振效果。Aiming at diesel two-stage vibration isolation system,considering that the heavy nonlinearity of the secondary path influences its dynamic system modeling,vibration analysis,active control strategy design and its control performance,a hybrid adaptive control strategy was presented here by integrating the adaptive notch filtering algorithm with the pre-compensator model reference adaptive inverse control （PCMRAIC）.In an active vibration isolation test of diesel two-stage vibration isolation system,based on decoupling Hammerstein nonlinear system and analyzing generalized frequency response functions （GFRFs）,linearized reference models and phase-frequency curves of the secondary path were built,and then the hybrid adaptive control strategy was analyzed.The results showed that the linearized reference model aprroaching the target nonlinear system can be employed to realize the excellent linearization of the system and provide the accurate phase-frequency curves of the secondary path,furthermore,the linearized reference model and the FIR model fitting of phase-frequency curves are adopted to determine the vibration isolation effect of the hybrid adaptive control strategy.In addtion,the results of the active vibration isolation test were compared with those of the vibrational energy modeling.It was shown that the vibration isolation effect of the optimal system vibrational energy level is obtained only when eliminating nonlinarity and suppressing its effect on the harmonic vibration of the system.

关 键 词：振动主动控制 系统非线性 线性化控制 自适应算法 隔振 

分 类 号：TB535.1[理学—物理] O322[理学—声学]