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 Control theory Application Group (CAG) 1. Eco-friendly vehicle design and control (1) PMSM control - Robust control based on DOB (disturbance observer) - Field weakening control - Development of motor driver - Real-time optimal torque control (2) Battery management system - State of Charge (SOC) estimation…
PMSM (Permanent-Magnet Synchronous Motor) Control Robust control based on DOB (Disturbance Observer) 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. Es…
Eco-friendly vehicle design and control
Eco-friendly vehicle design and control 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 …
Battery management systemState of Charge (SOC) Estimation Method for Lithium-ion Battery CellThe SOC representing the amount of charge in the battery cell is the most important factor because it directly relates to the number of miles that an EV can travel. Unlike the terminal voltage and current, there is no way to measure the SOC directly. Therefore, there should be an adva…
Stability control for Electric Vehicle (EV)
Stability control for Electric Vehicle (EV) Vehicle States Estimation Accurate vehicle states (Accelerations, Velocities, etc.) are required for the precise vehicle control. However, there are states that can not be measured directly through the sensor due to the absence of the sensor or the price. Typically, tire force is the only external force acting on the vehicle, but it…
3D vision and image processing
3D Vision and image processing 3D Vision Acquiring 3D information from the environment is crucial for many applications. While active sensors such as LiDAR is the common choice for this purpose, alternative solution from stereo camera has the potential to be more cost-efficient. Typical shortcoming with stereo vision algorithms however, is in its accuracy as well as computation tim…
Autonomous vehicle control Autonomous vehicle stability control With the recent development of autonomous vehicles, the level of autonomous vehicles has gradually increased. As the level increases, the degree of driver intervention in the autonomous driving state is decreasing. For this reason, vehicle stability in autonomous vehicles should be considered more important. Basic…
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…
About SRG... 1. Plastics Recycling Robot - Real-time sorting system for mixed color plastics by applying a machine learning algorithm - Parallel manipulator system 2. Prosthetic Hand System - Dual-Mode Twisted String Actuation (TSA) - Prosthetic hand Hardwa…
Plastics Recycling Robot These days, pollution from discarded plastic is getting serious. Great Pacific garbage patch consisted of abandoned plastics is killing marine life. Micro-plastics induced by waves and solar UV radiation can be accumulated in the human body. Recycling plastic is the hot potato of waste management. To solve this problem brilliantly, factory autom…
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 …
Skiing Humanoid Robot, TiBo Hybrid Actuation Biped Mobile Robot We study the development and control of a hybrid biped robot composed of a motor system for the hip joint, and a pneumatic system for the knee joint and ankle joint. In order to ensure the mobility of the robot, development of a small pneumatic generator has been preceded, and a robot similar to the human appeara…