子系统的空间状态方程联接方法研究
发布时间：2019-02-13 06:40
【摘要】：由于复杂的结构或机构模型在建模和计算分析时均十分困难,所以需要采用子结构模态综合法(CMS),通过将大型结构模型划分成为多个部分之后分别进行分析,之后用联接的方法将各个部分组合成为整体模型。 本文首先基于有限元的模态分析结果,给出了建立相应结构或机构状态空间方程的一般方法。并在此基础上,根据子模型联接界面处的相应节点的位移相等以及相互之间作用力大小相等方向相反的边界协调条件,推导了子模型的空间状态方程联接的一般公式,实现了子模型空间状态方程的联接。 最后以天线实例模型进行有限元分析后得到相关的状态空间方程,通过仿真结果对比验证了由结构分析建立控制状态空间方程以及联接方法的可行性。
[Abstract]:Because the complex structure or mechanism model is very difficult to model and calculate and analyze, it is necessary to use the substructure modal synthesis method (CMS),) to analyze the large structure model by dividing it into several parts. Then each part is combined into a whole model by the method of joining. In this paper, based on the modal analysis results of finite element method, a general method for establishing the state space equation of the corresponding structure or mechanism is presented. On this basis, based on the boundary coordination conditions in which the displacement of the corresponding node at the interface of the submodel is equal and the forces are equal and the direction of the interaction is opposite, the general formula of the spatial state equation connection of the submodel is derived. The connection of the space state equation of the submodel is realized. Finally, the state space equations are obtained by finite element analysis with the antenna model, and the feasibility of establishing the control state space equation and the connection method from the structure analysis is verified by the simulation results.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH131
本文编号：2421287
[Abstract]:Because the complex structure or mechanism model is very difficult to model and calculate and analyze, it is necessary to use the substructure modal synthesis method (CMS),) to analyze the large structure model by dividing it into several parts. Then each part is combined into a whole model by the method of joining. In this paper, based on the modal analysis results of finite element method, a general method for establishing the state space equation of the corresponding structure or mechanism is presented. On this basis, based on the boundary coordination conditions in which the displacement of the corresponding node at the interface of the submodel is equal and the forces are equal and the direction of the interaction is opposite, the general formula of the spatial state equation connection of the submodel is derived. The connection of the space state equation of the submodel is realized. Finally, the state space equations are obtained by finite element analysis with the antenna model, and the feasibility of establishing the control state space equation and the connection method from the structure analysis is verified by the simulation results.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH131
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