A design of automatic controller for seismic protection system of towers
It is common knowledge that civil engineering structures must withstand ever changing environmental loads such as wind,earthquakes etc.during the span of their useful lives.Yet,until very recently,buildings,bridges,and other constructed facilities have been built as passive structures that they rely on their mass and solidity to resist outside forces,while being incapable of adapting to the dynamics of an ever changing environment.1 In recent years,however,a number of factors have emerged that signal and need for considering structures with some degree of adaptability or responsiveness.As a result,new concepts of structural protection and structural motion control,such as supplemental damping,passive control and active control,have been advanced and are at various stages of development.Most of the current active structural control strategies for a seismic protection have been based on either full-state feedback(i.e.,structural displacements and velocities)or velocity feedback.2 However,accurate measurement of the displacement and velocities is difficult to achieve directly,particularly during seismic activity,since the foundation of the structure is moving with the ground.Because accelerometers can readily provide reliable and inexpensive measurements of the structural accelerations at strategic points on the structure,development of control methods based on acceleration feedback is an ideal solution.The controller design is based on optimal control strategies.The objective of this paper is to demonstrate using MATLAB simulation that stochastic control methods based on absolute acceleration measurements are viable and robust,and that they can achieve performance levels comparable to full-state feedback controllers.The soil structure interaction effect is considered.
structural control active tendon system seismic load linear quadratic regulator (LQR) soil structure interaction (SSI)
T. Rengaraja P. Devadas Manoharan
R M D Engineering College,Kavaraipettai-601 206,India Anna University,Chennai-600 626,India
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）