A5052688755- Biomimetic flight and propulsion mechanisms
- Aerospace Engineering and Energy Systems
- Fish Ecology and Management Studies
- Underwater Vehicles and Communication Systems
- Robotic Locomotion and Control
- Turbomachinery Performance and Optimization
- Fluid Dynamics and Vibration Analysis
- Aerodynamics and Fluid Dynamics Research
- Wind Energy Research and Development
- Micro and Nano Robotics
- High-Velocity Impact and Material Behavior
- Hydrology and Sediment Transport Processes
- Fluid Dynamics Simulations and Interactions
- Advanced Numerical Analysis Techniques
- Advanced Aircraft Design and Technologies
- Manufacturing Process and Optimization
- Vibration Control and Rheological Fluids
- Gear and Bearing Dynamics Analysis
- Wave and Wind Energy Systems
- Cellular and Composite Structures
Ho Chi Minh City University of Technology and Education
2021-2024
Ho Chi Minh City University of Technology
2014-2015
Konkuk University
2008-2013
Purpose – The purpose of this paper is to demonstrate the uncontrolled vertical takeoff an insect-mimicking flapping-wing micro air vehicle (FW-MAV) 12.5 cm wing span with a body weight 7.36 g after installing batteries and power control. Design/methodology/approach forces were measured using load cell estimated by unsteady blade element theory (UBET), which based on full three-dimensional kinematics. In addition, mean aerodynamic force center (AC) was determined UBET calculations Findings...
A flapping-type turbine extracts power from the kinetic energy of water stream by heaving up and down. nose-up pitch angle will create an upstroke motion flapping arm vice versa for nose-down pitch. These downstroke then be converted into a continuous rotary output shaft transmission system. In this work, we describe our current progress on development design prototype implementation tidal harvester introduce dynamic model its experimental validation together with efficiency.
In this paper, we present an approach to increase flapping frequency of a previously developed flapper actuated by lightweight piezo-composite actuator (LIPCA). This is effort mimic the motion Allomyrina Dichotoma which typically 30 Hz. For purpose, dynamic characteristic LIPCA and parameter study four-bar linkage have been conducted. From finite element analysis experiment, it was found that first resonant in simply supported configuration about 80 When dummy mass 50 grams attached at...
A flapping-type generator extracts power from tide induced vertical or swing motion of a hydrofoil hydroplane submerged in water. When nose-up pitch angle is prescribed for the hydroplane, it moves upward creating an upstroke flapping arm and vice versa nose-down pitch. These up down are then converted into continuous rotary output shaft by transmission system. In this study, we introduce design prototype implementation flappingtype tidal energy harvester including details on transmission,...
This study aims to investigate the effects of draw beads on crashworthiness aluminum tubes under axial quasi-static loading. Based this design philosophy, a total 12 beading tube designs with various configurations were developed. Within each design, effect arrangement bead form performance was also analyzed. A finite element model, validated using experimental tests, used and progressive deformation tubes. results, multi-criteria decision-making method known as Technique Order Preference by...
This paper demonstrates how to implement inherent pitching stability in an insect-mimicking flapping-wing system for vertical takeoff. Design and fabrication of the is briefly described focusing on recent modification. Force produced by systems estimated using UBET (Unsteady Blade Element Theory) developed previous work. The estimation shows that wing twist placed modified can improve thrust production about 10 %. compared with measured thrust, which proves provides fairly good estimations...
Purpose – The aim of this paper is to investigate the effect wing kinematics change on force generation produced by flapping wings.
본 연구에서는, 블레이드 요소-모멘텀 이론을 바탕으로, 최대 출력계수를 갖는 직경 80 cm의 실험실용 수평축 조류 터빈의 형상을 제시하고, 피치각이 변할 때 출력계수의 변화 경향을 조사하였다. 또한 ANSYS-Fluent를 이용한 전산유체해석을 실시하여, 주어진 피치각에 대하여 이론으로 계산한 검증하였다. 전산유체해석에는 계산 영역의 직경과 길이를 터빈 반경의 15배로 하였고, 경계에는 열린 경계조건을 인가하였다. 이론과 전산유체해석으로 출력계수 약 48%로 서로 잘 일치하였다. 피치각을 증가한 경우에는 두 방법으로 산출한 출력계수가 모두 감소하는 보였고, 그 값들도 유사하였다. 이로부터, 기반으로 설계한 형상 및 다양한 조건에서 대한 신뢰성을 확인하였다.
We have been developing a beetle-mimicking flappingwing system that can create flapping angle of 140° to 160° and rotational 100° 110°. Aerodynamic force is produced by artificial wings, which are attached the mechanism flexible hinges. In this study, we investigate effect wing kinematics on generation attaching wings flapping-wing in three different configurations. Even though was designed flap at about 40 Hz, it excited 25 Hz maintain quality signal process for measurement. The average...