复杂结构局部振动的控制

ACTIVE CONTROL FOR LOCAL VIBRATION OF COMPLEX STRUCTURES

由于大型复杂结构的高维性，在对其局部振动进行控制时，常规的设计方法设计出的控制器存在着难以实现等问题。针对这一问题，本文提出了一种局部振动控制器的设计方法，它将设计过程分为局部控制器设计和局部控制器作用于复杂结构时的闭环修改两个部分。由于控制器设计是在物理空间内进行的，并且仅需要局部振动测量，因此控制器易于实现。算例中显著的减振效果表明了该方法的可行性。

In some cases,the local vibration level of complex structures must be controlled.If the optimal regulator is used, the controller will be realized difficultly, because of the high dimension order of complex structures.Aimed at this problem, the paper presents a method for designing the local controller.The method composes of two parts.One is the design of the local controller by aggregating uncontrolled states, and then using optimal regulator. The other is the close loop modification by optimizing the weighted matrices of the cost function to assure the pole locations of the close loop system, while the local controller is connected to the structure.The excellence of the method is that local controller only feeds back the local state to complex structure, so it can be realized easity.The evident vibration reduction of the example shows the feasibility of the method.