Magnetorheological fluid technology has gained significant development during the past decades. The application of magnetorheological fluids has grown rapidly in civil engineering, safety engineering, transportation, and life science with the development of magnetorheological fluid–based devices, especially magnetorheological fluid dampers. The magnetorheological fluid dampers could offer an outstanding capability in semiactive vibration control due to excellent dynamical features such as fast response, environmentally robust characteristics, large force capacity, low power consumption, and simple interfaces between electronic input and mechanical output. To address the fast growing demand on magnetorheological fluid damping technology in extensive engineering practices, the state-of-the-art development is presented in this article, which provides a comprehensive review on the structure design and its analysis of magnetorheological fluid dampers (or systems). This can be regarded as a useful complement to...

Magnetorheological fluid dampers: A review on structure design and analysis

Vehicle system dynamics integration encompasses interdisciplinary challenges innovations in various aspects related to vehicle system/subsystems/components dynamic characteristics, modeling and validation, vehicle dynamics state measurement and estimation, vehicle/chassis control systems, coordination of power management and dynamics/stability control, etc [1-4]. These are becoming more critical due to the increasing concern and rapid development in electric and hybrid vehicles, which tend to exhibit different vehicle dynamics/stability and control characteristics when compared to conventional vehicles.

Mechanical systems and signal processing

An adaptive unsaturated bistable stochastic resonance method and its application in mechanical fault diagnosis

Smart materials are kinds of designed materials whose properties are controllable with the application of external stimuli such as the magnetic field, electric field, stress, and heat. Smart materials whose rheological properties are controlled by externally applied magnetic field are known as magneto-rheological materials. Magneto-rheological materials actively used for engineering applications include fluids, foams, grease, elastomers, and plastomers. In the last two decades, magneto-rheological materials have gained great attention of researchers significantly because of their salient controllable properties and potential applications to various fields such as automotive industry, civil environment, and military sector. This article offers a recent progressive review on the magneto-rheological materials technology, especially focusing on numerous application devices and systems utilizing magneto-rheological materials. Conceivable limitations, challenges, and comparable advantages of applying these magn...

A state of art on magneto-rheological materials and their potential applications:

An improved Artificial Neural Network using Arithmetic Optimization Algorithm for damage assessment in FGM composite plates

This paper presents a new type of jetting dispenser featuring piezoelectric actuator in order to achieve high flow rate and
small dot sizes in semiconductor packaging processes. After describing structural components of the dispensing
mechanism and the operating principle, a dynamic modeling is undertaken by considering the behavior of the piezostack,
hydraulic magnification, dispensing needle and adhesive fluid. In the modeling, fluid models for adhesive fluid and
hydraulic magnification are derived with a dumped parameter method. The governing equation of motion is then derived
by integrating the fluid models with structural model. Subsequently, the dynamic behavior of the dispenser and its
dispensing amount are investigated by applying several types of square wave driving voltage input and design parameter
values are determined.

Performance evaluation of a new type of jetting dispenser using piezoelectric actuator

We study families of porous medium equations with nonlocal pressure. We construct their weak solutions via JKO schemes for modified Wasserstein distances. We also establish the regularization effect and decay estimates for the Lp norms. 

Gradient Flows of Modified Wasserstein Distances and Porous Medium Equations with Nonlocal Pressure

In this work, the configuration of a haptic gripper featuring magnetorheological(MR) brakes is proposed and an optimal design of the MR brakes for the haptic griper is performed considering the required braking torque, the uncontrollable torque(zero-field friction torque) and mass of the brakes. Several configurations of MR brake is proposed such as disc-type, serpentine-type and hybrid-type. After the configurations of the MR brakes are proposed, braking torque of the brakes is analyzed based on Bingham rheological model of the MR fluid. The zero-field friction torque of the MR brakes is also analyzed. An optimization procedure based on finite element analysis integrated with an optimization toolbox is developed for the MR brakes. The purpose of the optimal design is to find optimal geometric dimensions of the MR brake structure that can produce the required braking torque and minimize the mass of the MR brakes. In addition, the uncontrollable torque of the MR brakes is constrained to be much smaller than the required braking torque. Based on the developed optimization procedure, optimal solution of the proposed MR brakes are achieved and the best MR brake is determined. The working performance of the optimized MR brake is then investigated.

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Quoc Hung Nguyen

Papers

Performance evaluation of a new type of jetting dispenser using piezoelectric actuator

Gradient Flows of Modified Wasserstein Distances and Porous Medium Equations with Nonlocal Pressure

Optimal Design of a Magnetorheological Haptic Gripper Reflecting Grasping Force and Rolling Moment from Telemanipulator