Results 11 to 20 of about 3,036 (184)

Lift Enhancement of Tiltrotor Wing Using a Gurney Flap

International Journal of Aerospace Engineering, 2022
A numerical investigation was undertaken to explore the lift-enhancing characteristics of the Gurney flap on a tiltrotor wing. The heights of Gurney flaps range from 1 to 4% wing chord lengths.
Hao Chen, Bo Chen
doaj   +2 more sources

Numerical Simulation of Continuous Tilting Transition of Tiltrotor Aircraft

Hangkong gongcheng jinzhan, 2021
The aerodynamic configuration of the tiltrotor aircraft is constantly changed during the tilting transition process, and the aerodynamic characteristics is of strongly nonlinear characteristics.Aiming at the complex states of continuous tilting ...
WU Weiwei, MA Cunwang, ZHANG Lian, SUN Kaijun   +3 more
doaj   +1 more source

Gait Analysis for a Tiltrotor: The Dynamic Invertible Gait

Robotics, 2022
A conventional feedback-linearization-based controller, when applied to a tiltrotor (eight inputs), results in extensive changes in tilting angles, which are not expected in practice. To solve this problem, we introduce the novel concept of “UAV gait” to
Zhe Shen, Takeshi Tsuchiya
doaj   +1 more source

Identification of a Stochastic Dynamic Model for Aircraft Flight Attitude Based on Measured Data

International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023
Stochastic disturbances are everywhere. The influence of stochastic factors on the modeling and simulation of aircraft flight dynamics should be considered. Therefore, a stochastic differential equation for aircraft flight attitude is modeled based on the traditional one in this paper.
Haiquan Li, Xiaoqian Chen, Jiatu Zhang, Bochen Wang, Jiahui Peng, Liang Wang, Jiaying Zhang   +6 more
wiley   +1 more source

Numerical Simulation of Tiltrotor Flow Field during Shipboard Take-Off and Landing Based on CFD-CSD Coupling

Aerospace, 2022
Due to the small tilt angle, a tiltrotor operates in non-axial flow conditions during shipboard take-off and landing. The non-uniformity of the blade’s air-load is high, resulting in structural deformation with high fluctuation frequency, affecting the ...
Peng Yu, Zhiyuan Hu, Guohua Xu, Yongjie Shi   +3 more
doaj   +1 more source

Lift Augmentation on a Tiltrotor Wing Using the Combination of Vortex Generators and Gurney’s Flap

International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023
Recently, flow control using vortex generators (VGs) and a Gurney flap (GF) has received considerable attention, but independently. The purpose of this study is to perform a numerical investigation into the lift augmentation effects of a tiltrotor wing with the combination of VGs and GF.
Hao Chen, Siliang Du, Zhong Chen, Vijayanandh Raja   +3 more
wiley   +1 more source

Model‐Based Design, HIL Testing, and Rapid Control Prototyping of a Low‐Cost POC Quadcopter with Stability Analysis and Control

Complexity, Volume 2022, Issue 1, 2022., 2022
Unmanned aerial vehicles (UAVs), particularly quadcopters, have several medical, agriculture, surveillance, and security applications. However, the use of this innovative technology for civilian applications is still very limited in low‐income countries due to the high cost, whereas low‐cost controllers available in the market are often tuned using the
Abdullah Irfan, Muhammad Gufran Khan, Arslan Ahmed Amin, Syed Ali Mohsin, Muhammad Adnan, Adil Zulfiqar, Chao Liu   +6 more
wiley   +1 more source

Large‐Slenderness‐Ratio Supersonic Aircraft Lateral–Directional Coupling Dynamics Analysis and Control

International Journal of Aerospace Engineering, Volume 2022, Issue 1, 2022., 2022
Large‐slenderness‐ratio aircraft in which a large portion of the aircraft’s mass is concentrated along its centreline face the problem of severe lateral‐directional coupling. Previous research has not fully considered the inertia product when conducting stability analyses of such aircraft. However, neglecting the inertia product may threaten the safety
Huitao Lyu, Zheng Gong, Yongliang Chen, Wanli Chen, Wenjian Wang, Xianfeng Yang   +5 more
wiley   +1 more source

Progressive and Prospective Technology for Cloud Seeding Experiment by Unmanned Aerial Vehicle and Atmospheric Research Aircraft in Korea

Advances in Meteorology, Volume 2022, Issue 1, 2022., 2022
This study applies a novel cloud seeding method using an unmanned aerial vehicle (UAV) and a research aircraft in Korea. For this experiment, the UAV sprayed a cloud seeding material (calcium chloride), and the aircraft monitored the clouds in the southern part of the Korean Peninsula on April 25, 2019.
Woonseon Jung, Joo Wan Cha, A.-Reum Ko, Sanghee Chae, Yonghun Ro, Hyun Jun Hwang, Bu-Yo Kim, Jung Mo Ku, Ki-Ho Chang, Chulkyu Lee, Feng Chen   +10 more
wiley   +1 more source

Modeling and Design of an Aircraft‐Mode Controller for a Fixed‐Wing VTOL UAV

Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021
Vertical takeoff and landing (VTOL) is an essential feature of unmanned aerial vehicles (UAVs). On the one hand, VTOL can expand and enhance the applications of UAVs; yet, on the other hand, it makes the design of control systems for UAVs more complicated.
Zhao Deng, Liaoni Wu, Yancheng You, Jie Chen   +3 more
wiley   +1 more source