摘要
设计了一个智能抛物面桁架天线,采用有限元方法得到了它的动力学模型.由于此模型的阶次太高,给以后的振动控制工作带来了极大的困难.采用模态集结法对其高阶模型进行降阶.通过零极点比较、输出曲线比较和将针对低阶模型设计的线性二次型最优控制律加入原高阶模型等方法对降阶结果进行了验证.
An intelligent paraboloid truss antenna is designed and its dynamic model is presented by means of finite element method. The model has a higher order, which brings a lot of difficulties in our later work of vibration control. Then the high order model was reduced by the modal aggregation method. The order-reduced results are verified by comparing the zeros, poles and outputs curves before and after the order reduction and applying the linear quadratic optimal control law for low-order model to the high-order model.
基金
安徽省自然科学基金(03042303)资助项目.
关键词
智能桁架天线
振动控制
有限元方法
建模
模型降阶
线性二次型最优控制
intelligent truss antenna
vibration control
finite element method
modeling
model reduction
linear quadratic optimal control
