摘要
对结构物理参数、几何尺寸、作用荷载和控制力同时具有随机性时 ,随机压电智能桁架结构中主动杆的配置位置和闭环控制系统增益进行了优化 ,基于系统最小储存能 ,构建了具有动应力、动位移可靠性约束的主动杆配置和控制增益的优化模型 ;并对结构动力响应的数字特征进行了推导。通过算例 ,验证了该优化配置模型的合理性和有效性 ,获得了若干有意义的结论。
Considering the randomness of physics parameters of structural materials,geometric dimensions of active bars and passive bars,applied loads and control forces simultaneously,the optimization of active bars'placement and feedback gains of closed loop control system for piezoelectric intelligent truss structures are studied in the paper.Based on the minimal energy stored in the structures,the optimal mathematical model with the reliability constraints on dynamic stress and displacement is built.The numerical characteristics of dynamic response based on probability property of intelligent structure are developed.Through example,the rationality and validity of presented model are demonstrated and some useful conclusions are obtained.
出处
《振动与冲击》
EI
CSCD
北大核心
2003年第1期56-60,共5页
Journal of Vibration and Shock
基金
西安电子科技大学青年科研基金资助项目
关键词
结构振动
随机智能桁架
压电主动杆
振动主动控制
piezoelectric active bar,random intelligent truss structures,optimal placement,active vibration control
