基于反馈FxLMS-鲁棒混合控制算法的主动隔振平台研究  

Active vibration isolation platform based on feedback FxLMS-robust hybrid control algorithm

作　　者：杨纪楠 焦素娟[1,2] 龙新华[1,2] YANG Jinan;JIAO Sujuan;LONG Xinhua(State Key Lab of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;Institute of Vibration,Shock and Noise,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]上海交通大学振动、冲击、噪声研究所,上海200240

出　　处：《振动与冲击》2024年第19期59-67,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(12121002)。

摘　　要：为解决传统滤波最小均方差(filtered-x least mean square,FxLMS)算法在收敛速度和稳定性之间存在的矛盾,以及次级通道模型不确定性对控制收敛性能的影响,将反馈FxLMS算法和混合灵敏度鲁棒控制器相结合,提出了一种反馈FxLMS-鲁棒混合控制算法,并在工程应用中常见的主动撑杆隔振平台上对该混合算法的振动控制性能进行仿真分析和试验验证。变载荷激励及控制通道变化仿真和试验结果均表明,不同激励下各个阶段的加速度响应衰减均超过80%,且与传统的FxLMS算法相比,所提出的混合控制算法具有更快的收敛速度和更强的鲁棒性。Here,to solve problems of contradiction between convergence speed and stability in traditional filtered-x least mean square(FxLMS)algorithm and effects of secondary channel model uncertainty on control convergence performance,a feedback FxLMS-robust hybrid control algorithm was proposed by combining the feedback FxLMS algorithm with a mixed sensitivity robust controller.Simulation analysis and test verification for vibration control performance of the hybrid algorithm were performed on an active strut vibration isolation platform commonly used in engineering application.Simulation and test results of variable load excitation and control channel variation showed that acceleration response attenuations at various stages under different excitations all exceed 80%;compared with traditional FxLMS algorithm,the proposed hybrid control algorithm has faster convergence speed and stronger robustness.

关 键 词：主动撑杆隔振平台 混合控制 滤波最小均方差(FxLMS) 混合灵敏度 

分 类 号：TH535[机械工程]