Application of Magneto-Rheological (MR) dampers in semi-active vibration dynamics control of a multi-cart system is studied. The dynamics and vibration behaviour of a two cart system is investigated mathematically and an experimental test-rig is employed to verify the model, experimentally. The Bouc-Wen model is utilized to represent the mathematical behaviour of MR damper. Different types of s...

Earthquake ground motions induced by a scenario event are spatially (partially) correlated and (partially) coherent. Simulated ground motion records can be used to carry out nonlinear inelastic time history analysis for a portfolio of buildings to estimate the seismic loss, which is advantageous as there is no need to develop and apply empirical ground motion prediction equations and the ductil...

Hysteresis is a highly nonlinear phenomenon, showing up in a wide variety of science and engineering problems. The identification of hysteretic systems from input-output data is a challenging task. Recent work on black-box polynomial nonlinear state-space modeling for hysteresis identification has provided promising results, but struggles with a large number of parameters due to the use of mult...

This study presents a precision stage driven by a piezoelectric actuator and equipped with a displacement magnification mechanism for the purpose of easy displacement measurement. The displacement magnification mechanism consists of flexible hinges and lever mechanisms. The developed stage is able to provide accurate measurement by virtue of the displacement magnification mechanism, but it is e...

-The performance of fuzzy logic (FLC) and PID controllers optimized by particle swarm optimization (PSO) for semi-active suspension system using magneto-rheological (MR) damper are investigated. MR damper is an intelligent damper filled with particle magnetic polarizable and suspended into a liquid form. The Bouc-Wen model of MR damper is used to determine the required damping force based on fo...

Abstract Accurate modeling of material behavior is very critical for the success magnetorheological elastomer-based semi-active control device. The property elastomer sensitive to frequency, magnetic field and input strain. Additionally, these properties are unique a particular combination matrix filler loading. An experimental-based characterization approach costly time consuming as it demands...

A new time-domain probabilistic technique based on hierarchical Bayesian modeling (HBM) framework is proposed for calibration and uncertainty quantification of hysteretic type nonlinearities dynamical systems. Specifically, hyper models are introduced respectively material model parameters as well prediction error variance parameters, aiming to consider both the due unmodeled dynamics. asymptot...

Base-isolated structures achieve superior seismic performance but with the cost of large deformation base floor, which possibly causes superstructure collapse during severe earthquakes. Hence, it is great interest to develop hybrid isolation systems that can reduce and simultaneously improve superstructure’s performance. Recently, several using inerter-based dampers have emerged; however, nonli...

• 1st investigation on the effect of multi-axis seismic excitation bidirectional sliding components. Evaluates ASCE 43-05 and 4-16 nuclear standards for displacement. different intensity measures response During an earthquake, equipment left unanchored in a facility can slide interact with safety-critical systems components, posing safety risk to facility. However, computing especially two dire...