Results 41 to 50 of about 123 (110)

VTOL UAV Transition Maneuver Using Incremental Nonlinear Dynamic Inversion

International Journal of Aerospace Engineering, Volume 2018, Issue 1, 2018., 2018
The paper seeks to study the control system design of a novel unmanned aerial vehicle (UAV). The UAV is capable of vertical takeoff and landing (VTOL), transition flight and cruising via the technique of direct force control. The incremental nonlinear dynamic inversion (INDI) approach is adopted for the 6‐DOF nonlinear and nonaffine control of the UAV.
Zhenchang Liu, Jie Guo, Mengting Li, Shengjing Tang, Xiao Wang, Paul Williams   +5 more
wiley   +1 more source

A Novel Aerodynamic Modeling Method Based on Data for Tiltrotor evtol

Applied Sciences
A data-driven aerodynamic modeling method is proposed to address the problem that traditional modeling methods based on physical mechanisms cannot fully represent the special aerodynamic characteristics of tiltrotor evtol aircraft.
Haiyang Wang, Peng Li, Dongsu Wu
doaj   +1 more source

Fuel Weight Fraction Estimation for a Disk–Rotor Hybrid Aircraft Along an Optimal Flight Trajectory During Concept Design

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
Owing to the transition flight of rotor/wing hybrid vertical take‐off and landing (VTOL) aircraft, the fuel weight cannot be estimated from empirical data during the conceptual design phase. This paper proposes a method for estimating the minimal fuel weight fraction (FWF) through a strategy of trajectory optimization under a given flight profile.
Menglin Yang, Zhiqiang Wan, De Yan, Jingwei Chen, Jinchao Chen   +4 more
wiley   +1 more source

Study of the development of Tilt-rotor aircraft [PDF]

Científica
The tilting rotor aircraft is a hybrid design that combines the fixed -wing flight modes and a rotating wing, thus combines the flight advantages of airplanes and helicopters.
Víctor Gabriel Sánchez Meza, Alberto Luviano Juárez, Yair Lozano Hernández, Jaime González Sierra   +3 more
doaj   +1 more source

Statistical modeling to relate technology readiness to schedule

Systems Engineering, Volume 27, Issue 1, Page 120-139, January 2024.
Abstract Projects from U.S. National Aeronautics and Space Administration and Department of Energy technology development activities provide historical data on project completion timelines versus technology readiness levels that were assessed during the life cycle of a program. A statistical analysis was performed to develop a method to forecast future
C. Robert Kenley, Shrividya Subramanian, Katherine M. Adams   +2 more
wiley   +1 more source

Longitudinal Integrated Attitude Control Law Design and Robustness Analysis of Tiltrotor Aircraft

Nanjing Hangkong Hangtian Daxue Xuebao
Since the tiltrotor aircraft needs to switch configurations among helicopter mode， transition mode， and fixed-wing mode within its flight envelope， and its dynamic characteristics vary significantly under different configurations， it is necessary to ...
CHEN Guojun, LIU Yi, ZHANG Wei
doaj   +1 more source

The Investigation on L1 Adaptive Control of the Tilt-Rotor Aircraft

International Journal of Aerospace Engineering, 2021
Considering the uncertainty of the flight dynamics model of the tilt-rotor aircraft in different flight modes, an L1 adaptive controller for full flight modes control system of tilt-rotor aircraft is designed.
Quanlong Chen, Shanyong Zhao, Ke Lu, Senkui Lu, Chunsheng Liu, Renliang Chen   +5 more
doaj   +1 more source

Robust Trajectory-Tracking for a Bi-Copter Drone Using INDI: A Gain Tuning Multi-Objective Approach

Robotics, 2022
This paper presents an optimized robust trajectory control system for an autonomous tiltrotor bi-copter based on an incremental nonlinear dynamic inversion (INDI) strategy combined with a set of PID/PD controllers. The methodology includes a lower level,
Maryam Taherinezhad, Alejandro Ramirez-Serrano, Arian Abedini   +2 more
doaj   +1 more source

Path‐Tracking Control of Tilting Quadrotor UAV Based on Variable Structure Sliding Mode Control Method

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
Tilting quadcopter unmanned aerial vehicles have the ability to perform vertical takeoff and landing, hover in the air, and cruise at high speeds, They can complete various flight tasks. Due to the special flight mode of tilting quadcopter unmanned aerial vehicles, in transition mode, as the tilt angle changes, the control process of the drone becomes ...
Qinghua Liu, Ke Zhang, Yunfan Pan, Huan Zhang, Jinchao Chen   +4 more
wiley   +1 more source

Research on Pilot Control Strategy and Workload for Tilt-Rotor Aircraft Conversion Procedure

Aerospace, 2023
This paper studies the pilot control strategy and workload of a tilt-rotor aircraft dynamic conversion procedure between helicopter mode and fixed-wing mode.
Xufei Yan, Ye Yuan, Renliang Chen
doaj   +1 more source