一种基于能量的振动主动控制新方法

A new approach to vibration active control based on energy

为了防止控制过程中作动器出现饱和现象,本文提出了一种基于能量的新的振动主动控制策略。该方法是通过比较容许能量与实际能量来确定结构控制力的大小,而其方向是通过对能量求导确定。由于不需要求解线性矩阵不等式,所以计算简单,操作方便。并且当采用同样容量限的多个作动器时,控制输出力一致,从而避免设计多个控制系统,简化了控制器设计。此外,由于采用阶跃控制,控制系统便于实现。最后,以六层建筑物为例来说明本文方法的可行性。

In order to prevent saturation phenomenon occurring in the course of control, a new strategy for vibration active control based on energy is presented. In the proposed algorithm, the amplitude of control force is derived by comparing permitting energy with actual energy, and their direction is determined by energy derivative. The proposed method has the merits of simple calculation and convenient operation as it is unnecessary to solve the linear matrix inequalities （LMIs）. Meanwhile, the output control forces are identical if the used actuators have the same capacity limitation, and those certainly simplify the design of controllers and let the multi-control system not to be used. Again, the realization of control system is also advantageous, because the step function is used as the control function. Finally, an example of 6-storey building is used to illustrate the feasibility of the proposed method.