机敏约束层阻尼薄板的μ综合鲁棒控制研究  

Study on μ-synthesis control of the thin plate with smart constrained layer damping

作　　者：王攀[1] 王正亚 孔德飞[1] 阳小光[1] 邓兆祥[1,3] 

机构地区：[1]重庆大学汽车工程学院,重庆400044 [2]奇瑞汽车股份有限公司,安徽芜湖241006 [3]汽车噪声振动和安全技术国家重点实验室,重庆400039

出　　处：《振动工程学报》2017年第5期781-789,共9页Journal of Vibration Engineering

摘　　要：以局部覆盖机敏约束层阻尼薄板为研究对象,对振动主动控制展开了研究。首先用ADF阻尼模型表征黏弹性层的阻尼特性,利用有限元法建立系统的动力学模型;并考虑模型的庞大自由度问题,对模型进行降阶处理;其次针对作动器和传感器位置对控制性能的影响问题,综合考虑控制输入与传感输出间关系,优化了作动器与传感器的位置,并对优化后理论模型进行了实验验证;最后针对模型模态参数误差和因舍去高频模态导致的模型混合不确定性问题,设计了μ综合鲁棒控制器,并通过硬件在环实验对控制效果进行验证。实验结果表明:复杂周期信号激励下的振动响应幅值衰减30%左右,白噪声激励下的振动响应的均方根值降低了9.1%左右。In this paper, the active vibration control of partial coverage piezoelectric smart constrained layer damping technology is researched. Firstly, the ADF damping model is applied to reveal the characteristics of the viscoelastic materials, and the sys-tem finite-element dynamical model is established. A low dimensional model is obtained with the treatment of order reduction. Secondly, the optimal locations of actuators and sensors are founded by comprehensively considering the relationship between the controlled input and output of the sensors to reduce their influence on the control performance. The correctness of the opti-mized theoretical model is verified by experiment. Lastly, a robust p. synthesis controller is designed to solve the problems caused by modal parameter error uncertainty and unmodeled dynamical uncertainty at high frequencies. The control effect is verified by hardware in loop test. The results show that the vibration response amplitude reduced about 30% under complicated periodic signal excitations and about 9. 1% under random white noise excitations.

关 键 词：振动主动控制 机敏约束层阻尼 位置优化 μ综合鲁棒控制 

分 类 号：TB535[理学—物理] TB381[理学—声学]