基于灵敏度分析的智能框架结构综合设计研究

A Study on Synthetic Design of Intelligent Frame Structures Based on Sensitivity Analysis

为减少框架系统在进行振动主动控制时所需控制能量 ,把结构设计与控制器设计相结合进行综合考虑 ,在保证框架结构基本性能和控制效果的前提下 ,重新修改原结构以达到降低控制能量的目的。考虑到系统模型总是存在误差 ,又引入了系统性能指标对经过综合设计所得到的次优解进行灵敏度分析 ,进而确定结构的最优设计参数。最后给出了计算实例 ,算例表明这一方法是有效的。

In order to reduce control energy needed for the active vibration control of frame structures, a synthetic design, which combines structure design with controller design is considered. To reduce the control energy, the original structure is modified on the premise that the requirements for the basic performances and control effect of the structure are satisfied. Considering the errors always existing in the system modelling, the sensitivity of a system parameter variation to the system's performance is introduced. The optimal system parameters are determined according to the sensitivity analysis of the suboptimal system parameters obtained from the synthetic design. The result of a numerical example shows the effectiveness of the method.