This lecture introduces vehicle chassis control and integrated chassis control. First, we will briefly introduce the mechanisms of ABS(Anti-lock Braking System), TCS (Traction Control System), ESC (Electronic Stability Control), Active Front Steering (AFS), RWS (Rear Wheel Steering), ECS (Electronic Controlled Suspension), and ARS (Active Roll)...
A journey to understand thermo-hydrodynamic coupling in cooling technology for high-heat-flux device Prof. Aejung Yoon ABSTRACT Thermal management of high-heat-flux electronic devices has recently become one of the most challenging problems in the latest industry. A pulsating heat pipe (PHP), has received attention in recent decades as a...
Multiscale Fatigue Life Prediction Models for Composite Materials Gun Jin Yun(gunjin.yun@snu.ac.kr) Department of Aerospace Engineering, Seoul National University Abstract Fiber-reinforced polymer matrix composite (FRPMC) materials have experienced fast growth in the aerospace industries over the past several decades, reaching out to applications to primary structural members. Due to nano...
Title: Unmanned Vehicle Advanced Research Center Human Machine Interface(HMI) Research Status Considering the level of autonomy of unmanned vehicles and human limitations of the operator, Human Machine Interface(HMI) technology that enables the operator to perform efficient and safe missions is being developed. The HMI project of...
Title: Agent-based Modeling and Simulation in the Generation of Digital Twins for Smart Manufacturing Abstract Over the years, the use of modeling and simulation (M&S) has been boosted for Digital Twinning of production systems. To keep pace with the technological changes, this talk covers three topics: i) M&S in...
Title: Applied Laser Processing for Semiconductor Fabrication Presenter: Prof. Joonghan Shin (Division of Mechanical Engineering and Automotive Engineering, Kongju National University) Abstract: Over the last ten years, laser processing has played a key role in the fabrication of semiconductor devices. Compared to the conventional heating process using a furnace or a lamp, laser processing has the following unique advantages: (a) local heating is possible with a small beam sot size; (b) raising the temperature of the material beyond its melting point is easily attainable due to high-intensity lasers; and (c) heating of shallow layer of the material just below the surface under the low thermal budget is possible by using an optimal wavelength and an annealing time in the range of milliseconds to nanoseconds. Due to the abovementioned characteristics, laser processing has been widely used in various applications for semiconductor manufacturing. This seminar aims to introduce the major applications (dopant activation, silicidation, void removal, and re-crystallization) of laser processing and the characteristics of laser equipment used for semiconductor manufacturing. ...
Introduction to Korea Space Launch Vehicle-II (Nuri) Korea Space Launch Vehicle-II (KSLV-II) has been developed to launch 1.5 ton mass to Sun Synchronized Orbit. KSLV-II is a three-stage rocket. The first stage is propelled by four 75 ton class liquid rocket engine of which propellants are liquid oxygen...
Nanoscale Biomimetic Materials for Sensor and Actuator Applications Byung Yang Lee School of Mechanical Engineering, Korea University, Seoul, Korea Nanoscale materials have high surface-volume ratio, making them ideal building blocks for sensors and actuators. In particular, starting from very few and simple building blocks such as collagen fibrils, nature easily builds hierarchical and complex supramolecular structures which are often hard to imitate with current top-down microfabrication techniques. Recently, with the development of diverse assembly methods of nanomaterials, we can obtain biomimetic structures with diverse optical, mechanical, and electrical properties using bottom-up approaches. Sometimes, the properties of such biomimetic materials, when exposed to certain physical or chemical stimuli, can change enough to be utilized for sensor or actuator applications. For example, some filamentous viruses can be assembled into colorful films on solid substrates, the colors of which can change when exposed to organic solvents and volatile organic compounds. Also, these same films, when applied with mechanical pressure, can exhibit piezoelectric properties, where mechanical pressure can be transduced to electrical signal, opening a possibility of using these structures as mechanical force sensors. In this talk, we will discuss on the current state of applying nanoscale materials for sensor and actuator application....
Title Soft Interfaces: From Microfluidics to Kitchen Abstract Living matter, from plants and animal cells, comprises complex materials with various phases and interfaces. A close look at how these soft interfaces arise and form certain shapes with functions will not only deepen our understanding of nature but also inspire the design and engineering of materials for novel applications. In this talk, I will first introduce hydrodynamic synchronization, which can be observed in swimming organisms, and explain how hydrodynamically interacting fluid-fluid interfaces can act as coupled oscillators leading to the discovery of a synchronized droplet generation. Second, I will present methods to fabricate nature-inspired shapes of microstructure to provide multifunctionality to the material, such as wrinkles on curved surfaces and multi-compartment microfibers, by exploiting oil-water interfaces. Lastly, I will investigate biological cells as soft matter to study the dependence of their motility on the geometry of cells and confinements as in complex tissue environments. We can even use materials found in our kitchen to understand the physicochemical roles of complex fluids in determining the shapes and motility of nature. My ultimate research goal in soft interfaces is to apply the knowledge from complex fluids experiments to emerging technologies of biomedical applications....
