About AOG... 1. Fabrication of SMTF (Single Mode Tapered Fiber) <Daewon Kang> - SA (Saturable Absorber) with CNT & Graphene - Fiber sensor with evanescent field 2. Real Time High FPS Displacement Measurement &l…
Coherent Anti-Stokes Raman Spectroscopy based on Fiber Optics
Coherent Anti-Stokes Raman Spectroscopy based on Fiber Optics We experimentally demonstrate compact and efficient single-pulse coherent anti-Stokes Raman spectroscopy (CARS) via spectral notch shaping implemented with a fiber Bragg grating.We show that a fiber Bragg grating can serve as a narrowband notch filtering component on a 90 nm broadband femtosecond pulsed laser without spectral disto…
Target Molecule Sensor System using Nanomaterials and Nanoscience
Target Molecule Sensor System using Nanomaterials and Nanoscience This research tries to find the best way to detect target molecules. Most researches are focused on the interaction between nano-material and target particles. To find effective method, the basic applicable physics of nano-sciecne such as 'flow induced energy geration'[1], 'CNTs carbonization'[2] and 'Selective deposition'[3] a…
Control theory Application Group
About CAG... 1. Motor control <Yonghun Kim, Youngjin Kim, Kyunghwan Choi> - Robust control based on DOB (disturbance observer) - Field weakening control - Regenerative braking algorithm - Development of motor driver 2. Vehicle …
PMSM (permanent-magnet-synchronous motor) Control
PMSM (permanent-magnet-synchronous motor) Control Among various types of motors, the permanent-magnet-synchronous motor (PMSM) is dominating for high performance applications due to its high energy-volume ratio, low noise, and durability. Our research is about how to control a PMSM more efficiently and precisely. Especially, the application of the disturbance observer based control…
Design and Control of Hybrid Electric Vehicles
electrified Manual Transmission (eMT) The eMT is a hybrid powertrain that can be implemented simply by inserting a electric motor into a conventional manual transmission. The electric motor can not only function as an additional power source, but also enables shifting without clutch operation by synchronizing the speed of the transmission input shaft and the speed of eng…
Vehicle Body Velocity SensorA new sensor system for measuring the relative velocity of the vehicle body to the ground is developed. When the camera faced on the ground and mounted on the vehicle body is shaken by a specific path to artificially form a motion blur, a Modulated Motion Blur is recorded in the image sensor. This Modulated Motion Blur implies the relative motion between the camera…
EPS(Electric power steering) system
EPS(Electric power steering) system Electric power steering system(EPS) is a motor supported power steering system that helps provide the driver with a lightweight and convenient steering feel. Because the steering system interacts with human hands, which can be sensitive, designing a good controller is subtle and challenging problem. We focus on all process of controller desig…
High Performance Strategy for Compact Electro-Hydrostatic Actuation (EHA) System
High Performance Strategy for Compact Electro-Hydrostatic Actuation (EHA) System A novel strategy for high performance of electro-hydrostatic actuation (EHA) systems is studied in view of both control and circuit design. A compact EHA system has been developed for mobile purpose from the advantage of high efficiency compared to conventional servo-valve controlled hydraulic actuatio…
Biped Walking Control Currently, most biped robot use electric motor actuator. However, the motor has a disadvantage in that the weight is heavy and the output is low relative to the weight and is not robust against the external shock. In order to overcome disadvantage of motor, we used pneumatic actuator. It has an advantage that the output is high in weight and the external shock…
About SRG... 1. Pneumatic system <Yunpyo Hongg> - Pneumatic feedback control system - Hydrogen peroxide power generator - Pneumatic robot leg 2. Prosthetic Hand System <Seokhwan Jeong, Younggeol Cho, Za…
Developing a Prosthetic Robot hand is one of the major research area in our laboratory. There have been continuous efforts on developing the anthropomorphic robot hands for various purposes either in the academy and the industry. Among many, considering a number of upper limb amputees, much attention has been paid to the prosthetic robot hands. However, it still has many limitation …
Twisted-String Actuators(TSAs) This research aims to develop high performance robot joints. To improve the performance of the robot joint, we proposed a robot joint using Twisted-String Actuators(TSAs) and proposed a variable radius pulley that can improve robot performance by controlling the speed ratio of the drive. It is confirmed that the performance of the robot joint is improved t…
Pneumatic generator We presents a novel pneumatic generator based on the catalytic decomposition of hydrogen peroxide for producing the pressurized gas for mobile robotic systems driven by pneumatic actuators, thus replacing portable air compressors driven by electric motors. By adopting a pressure-feedback mechanism, hydrogen peroxide is autonomously self-injected into the catalytic reactor …
Vibration Sensing & Isolation System
Vibration Sensing & Isolation System This research propose a sensor that is small enough to be inserted between automobile parts and capable of measuring the force between parts for quantify and objectify the ride comfort of automobile. It can be used at various locations where rubber bushes are installed to determine the main transmission path of vibration during driving. In order…