Minh Trung Duöng | EPFL Graph Search

Minh Trung DUONG was born in Vietnam in 1991. He obtained the Bachelor degree in Electrical Engineering from Hanoi University of Science, and Technology in 2014 and the Ph.D degree in 2019 from Korea Electrotechnology Research Institute. He is currently working at the Laboratory of Integrated Actuators. His research interests include design and analysis of electrical machine and actuators, and energy harvesting from various sources.

Exploring Beyond the Helmholtz Coils for Uniform Magnetic Field Generation with Topology Optimization

Minh Trung Duöng, Yves Perriard, Xiaotao Ren, Adrien Jean-Michel Thabuis

Uniform magnetic fields are desired in a wide range of applications. The most known device achieving such a purpose is the pair of Helmholtz coils. It consists of two identical circular coils, with their main axis aligned and placed at a distance equal to their common radius from each other. The goal of this research is to find another arrangement of the coils in space so as to achieve the largest region possible with a uniform magnetic field. A topology optimization framework is developed for this purpose. It investigates the ideal distribution of current densities in an axisymmetric 2D domain. The designed topology provides a significant improvement of the volume with a uniform field, which is 6.37 times larger than the reference one obtained with Helmholtz coils.

2022

Preliminary Study of Pressure Self-Sensing Miniature Magnetorheological Valves

Yoan René Cyrille Civet, Minh Trung Duöng, Kenny Jeanmonod, Sofia Lydia Ntella, Yves Perriard

Magnetorheological (MR) valves have been included in many innovative engineering systems, such as dampers, clutches, or brakes, with different fields of application. Their role serves actuation purposes, while integrated displacement and velocity sensing in the actuators has been studied, as well. In this paper, we present the working principle, design, and preliminary results of a miniature MR valve with pressure self-sensing capabilities that exploits the electromagnetic induction phenomenon. The valve can work in a pressure range from 200 kPa to 700 kPa, supplied by a current of a maximum 0.3 A. The suggested valve design is realized with two coils, one for the current application and the magnetic field creation and one for the sensing of the electromagnetic induction. A specially designed test-bench, that facilitates MR fluid flow and pressure regulation, was used for the experimental procedures.

IEEE2021

Design optimization of Miniature Magnetorheological Valves with Self-Sensing Capabilities Used for a Wearable Medical Application

Yoan René Cyrille Civet, Minh Trung Duöng, Sofia Lydia Ntella, Yves Perriard

Magnetorheological (MR) fluids are materials characterized as “intelligent” since their rheological properties may be controlled by the excitation of an external magnetic field. The application of the latter brings the fluid from a liquid to a semi-solid state. Due to their properties, these materials are widely used, among others, in biomedical applications. In the present work, multiple MR valves are incorporated as pressure limiters in a smart biomedical insole for diabetic patients. The diabetics are affected by high plantar pressures that cause ulceration and frequently, as a consequence of ulceration, lower extremity amputation. This novel insole aims at the active plantar pressure offloading. Thus, considering the small size of the insole, the number of the valves, as well as the high plantar pressures that reach up to 1 MPa on diabetic feet, a study is performed on optimizing the design of the MR valve, exploiting the Design of Experiments (DoE) techniques. Moreover, a testbench is presented for the examination of pressure self-sensing capabilities of the valves, with a future goal to integrate them in the design optimization and acquire a sensorless system.

IEEE2020