본 논문은 MR댐퍼를 기반으로 하는 제어시스템을 대형 구조물 등에 설치할 수 있도록 간편한 알고리즘을 구현하였다. 아울러, MR댐퍼를 기반으로 하는 스마트 수동제어 시스템을 제안하였다. MR댐퍼는 최근에 각광 받는 반능동 제어 장치로써, 배터리와 같은 소규모 전력을 사용하고, 이에 따른 비상시의 신뢰성, 그리고 상...
u(t) c 1 2 k 3 m f c Abstract A preliminary study was conducted to investigate numerical models that can be used to simulate the dynamic behaviour of a damper based on magnetorheological (MR) material...
t years, considerable attention has been paid to research elopment of structural control devices, with particular emon alleviation of wind and seismic response of buildings ges. In both areas, serious...
steel frame eq uipped with MR -dampers on the 1 st , 3 rd and 5 th floors. In experimental test s, an EL Centro earthquake, a Kobe earthquake and a Chi -Chi earthquake (station TCU067) are used as gro...
With the development of the control research, intelligent control has become one of the most popular research topics worldwide. The traditional method of Numerical simulation on control theories are r...
Whole body vibration in operational vehicles can cause serious musculo-skeletal disorders among the exposed workers. Consequently, considerable efforts have been made to protect vehicle operators from...
We propose a new active vibration control strategy of structural systems based on the information of future seismic waveform observed in remote observation sites. The observed waveform information of ...
Vehicle manufacturers have been attempting to increase engine efficiency and decrease pollution through various methods. Variable valve actuation technology is one of these methods. Several mechanisms...
Under high velocity, pulse type near source earthquakes semi-active control systems are very effective in reducing seismic response base isolated structures. Semi-active control systems can be classif...
Under extreme service conditions in vehicle suspension systems, some defects exist in the hardening, bodying, and poor temperature stability of magnetorheological (MR) fluid. These defects can cause w...
Two semiactive control schemes for protecting structures against earthquakes using magnetorheological dampers as control devices are presented. The design of the schemes is based on the LuGre's dynami...
Traditional structure was used as an active control mechanism and structure system under the stable situation in the time history of dynamic response. In order to attain the energy dissipation, the ad...
To survive in nature, animals adjust the characteristics of their legs or fins to adapt the motion to their environment. Inspired by the locomotion of animals, a study on the tunable stiffness and dam...
Title of dissertation: SYMBOLIC AND NUMERIC SOLUTIONS OF MODIFIED BANG-BANG CONTROL STRATEGIES FOR PERFORMANCE-BASED ASSESSMENT OF BASE-ISOLATED STRUCTURES Robert R. Sebastianelli, Jr., Doctor of Phil...
Title of Thesis: THE EFFECTS OF UNMITIGATED IDLE TIME ON THE PERFORMANCE OF MAGNETORHEOLOGICAL DAMPERS AS A STRUCTURAL PROTECTIVE SYSTEM. Sami Ur-Rahman Khan Master of Science Civil and Environmental ...
Three semi-active control methods are investigated for use in a suspension system using a commercial magnetorheological damper. The three control methods are the limited relative displacement method, ...
This work investigates the efficiency of mixed base isolation, combining passive isolation bearings with semi-active (SAC) devices, to reduce the floor spectral acceleration in the vicinity of the non...
This work describes a new technique for parameter estimation for magnetorheological dampers which relies on rearrangement of the constitutive equations for the modified Bouc–Wen model to obtain a cost...
This thesis explores semi-active structural control methods for mitigating damage during seismic events. Semi-active devices offer the adaptability of active devices in conjunction with low power requ...
This thesis considers two main issues concerning the application of a rotary type magnetorheological (MR) damper for damping of flexible structures. The first is the modelling and identification of th...