Semi-Active Control of Variable Stiffness for Building Structures

该项目已提交给“性能、安全和减灾研究的结构控制”竞赛。研究工作的重点是利用一种新型的半主动连续变刚度（SACVS）装置开发变刚度结构系统，该装置可以连续平稳地改变结构刚度和频率，在地震和风的激励下不产生脉冲力并保持非谐振状态。本项目的主要目标是：通过建立分析模型和实验标定模型，表征组合线性结构和非线性- sacvs装置的非线性动力学特性；开发基于神经网络等智能控制策略的控制算法；对结构系统中的SAVCS装置进行振动台试验；并通过比较SACVS系统的受控和非受控响应，以及与完全主动系统的对比来评估其有效性。这项研究的结果将有助于创新半主动连续变刚度系统的发展及其在结构控制中的应用，该系统将需要更少的功率来运行，并将克服现有控制系统的局限性。＊＊＊

9625979 Nagarajaiah This project was submitted to the "Structural Control for Performance, Safety and Hazard Mitigation Research" competition. The work centers on the development of variable stiffness structural systems using a novel semi active continuous variable stiffness (SACVS) device which varies the structural stiffness and frequency continuously and smoothly, without inducing impulsive forces and maintaining nonresonant state under seismic and wind excitation. The main objectives of the project are: to characterize the non-linear dynamics of the combined linear structure and nonlinear-SACVS device by developing analytical models and calibrating these models experimentally; to develop control algorithms based on intelligent control strategies such as neural networks; to perform shake table testing of the SAVCS device in a structural system; and to evaluate the effectiveness of the SACVS system by comparing its controlled and uncontrolled response, and as compared to a fully active system. Results from this research will contribute to the development of innovative semi-active continuous variable stiffness systems and their application to structural control which will require less power to operate and will overcome limitations of existing control systems. ***