修改的预测控制方法在智能结构振动抑制中的应用  

Application of Modified Predictive Control for Vibration Suppressing of Flexible Structure

作　　者：费红姿 王学孝[1] 黄文虎[1] 

机构地区：[1]哈尔滨工业大学航天工程与力学系,哈尔滨市150001

出　　处：《中国机械工程》2003年第18期1545-1547,共3页China Mechanical Engineering

摘　　要：在输出预测控制的基础上,提出了一种修改的预测控制算法,即在预测时域内,使系统的控制榆入不再保持不变,而是在一定的时域内可以线性改变,这样提高了控制的灵活性和系统的动态性能。将修改的预测控制算法应用于悬臂梁的振动控制。仿真结果表明,基于新的预测控制算法更加有效地抑制了柔性结构的振动。A modified predictive control algorithmfor suppressing vibration of flexible structural system isdeveloped based on the state space model. Before thecontrol algorithm is modified, the predictive control in-puts are kept constant throughout the predictive horizonso that dynamic instability is induced to the control sys-tems. After the control algorithm is modified, the predic-tive control inputs are assigned to vary in the controlhorizon so that the control flexibility is improved. Andthe dynamic performance of the control systems is superi-or to that of the original one. The feasibility of the modi-fied control algorithm is verified through a smart struc-ture of a cantilever beam with surface mounted piezocer- camic. The simulation results have shown that the modi-fied predicative control is an effective method for the vi-bration suppression.

关 键 词：预测控制 智能结构 主动振动控制 柔性结构 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]