基于加速度反馈的智能梁的受迫振动主动控制(英文)  

Acceleration Feedback for Active Control on Forced Vibration of an Intelligent Cantilever Beam

作　　者：安方[1] 陈卫东[1] 张万良[2] 

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2013年第6期702-713,共12页Journal of Ship Mechanics

摘　　要：针对含可用微分方程描述的外激励的受迫振动系统,考虑外激励的影响,将描述外激励的状态方程与振动系统状态方程联立,基于最小误差激励和状态导数反馈控制思想,设计一种考虑外激励的加速度反馈控制器,用于智能梁的受迫振动的主动抑制。由于此控制方法不是采用状态反馈或部分状态思想设计的位移或速度反馈控制而是加速度反馈,在采用加速度测量的测控系统中,可省去由测试加速度信号经一次或两次数值积分分别获得速度、位移信号的步骤,由此可避免数值积分引起的累积误差的影响。另外,由于此控制器设计过程考虑外激励的影响,较之未考虑外激励影响的加速度反馈控制器,在抑制智能梁的受迫振动控制中,发挥出了更好的控制品质。This paper is devoted to design an acceleration feedback controller considering the effects of the external force satisfying a linear differential equation. The equations described the external force and the forced vibration system are combined into a new state equation with state vector and force vector. Based on this expanded state equation, the minimum error excitation method and the output derivative-state feedback control approach are used to design the acceleration feedback controller taking the harmonic excitation into account. Due to the controller only including accel- eration signal, it can save the process of getting numerical integration to obtain the displacement or velocity signals from acceleration signals on the controller system adopting the displacement or velocity feedback control on the basis of the idea of state or output state feedback in the vibration system with accelerometer, so that the accumulation errors caused by once and the twice integra- tion of the acceleration signal can be avoided. In addition, the controller is designed with the con- sideration of disturbance, so it can effectively reduce the forced vibration response of an intelligent cantilever beam under the external force by simulation results, and compared with acceleration feed- back controller without considering external excitation, it has better control performance.

关 键 词：受迫振动 振动主动控制 状态导数反馈 加速度反馈控制 最小误差激励 

分 类 号：O328[理学—一般力学与力学基础] TB123[理学—力学]