随机参数智能桁架结构振动控制中主动杆的优化配置

Optimal Placement of Active Rods in Active Vibration Control of Smart Truss Structures with Random Parameters

该文研究压电智能桁架结构振动主动控制中结构物理参数、作用荷载和控制力同时具有随机性时 ,压电主动杆的最优配置和增益优化问题。采用智能结构的状态空间模型建立了以最大耗散能准则为基础的目标函数 ,建立了具有动应力、动位移可靠性约束的主动杆的优化配置和增益优化模型 ,对结构动力响应的数字特征进行了推导。并通过一智能桁架结构的优化配置计算 。

Considering the randomness of the physical parameters of structural materials, applied loads and control forces, the optimization of active rod placement and feedback gains for the vibration control of smart truss structures are studied in this paper. Firstly, the performance function is defined based on the maximization of dissipated energy by control action. Then, the optimal mathematical model with the reliability constraints on dynamic stress and displacement is built. The features of dynamic response based on probability of a smart structure are given. Finally a planar smart truss structure is used as an example to vodidate the presented model and approach in active vibration control of structures.