Results 1 to 10 of about 1,488,241 (284)

Safety risk assessment and prevention and control measures for reloading airdrop missions [PDF]

E3S Web of Conferences, 2021
In recent years, as the heavy equipment airdrop work continues to deepen, Chinese heavy equipment airdrop business has shown a vigorous development trend, and mission training is getting closer and closer to actual combat.
Jihui Xu, Jing Zhang, Wenjie Tian, Jiahui Shi, Tengfei Liu, Xiaolin Wang, Yujin Chen, Rui Guo   +7 more
doaj   +1 more source

Risk assessment of heavy landing based on BWM and cloud model [PDF]

E3S Web of Conferences, 2021
Aiming at the systemic, ambiguity and randomness characteristics of the aircraft's heavy landing risk, this paper starts from the system perspective and proposes a risk assessment method based on the Best- Worst method (BWM) and cloud model.
Jiahui Shi, Jihui Xu, Tengfei Liu, Jing Zhang, Pu Zhu, Chunlin Yang   +5 more
doaj   +1 more source

Incremental Backstepping Sliding-Mode Trajectory Control for Tailless Aircraft with Stability Enhancer

Aerospace, 2022
This paper presents an incremental backstepping sliding-mode (IBS) controller for trajectory control of a tailless aircraft with unknown disturbances and model uncertainties.
Zihou He, Jianbo Hu, Yingyang Wang, Jiping Cong, Linxiao Han, Maoyu Su   +5 more
doaj   +1 more source

Attitude-Tracking Control for Over-Actuated Tailless UAVs at Cruise Using Adaptive Dynamic Programming

Drones, 2023
Using adaptive dynamic programming (ADP), this paper presents a novel attitude-tracking scheme for over-actuated tailless unmanned aerial vehicles (UAVs) that integrates control and control allocation while accounting for nonlinearity and nonaffine ...
Zihou He, Jianbo Hu, Yingyang Wang, Jiping Cong, Yuan Bian, Linxiao Han   +5 more
doaj   +1 more source

Safety Assessment of Transport Aircraft Heavy Equipment Airdrop: An Improved STPA-BN Mechanism

IEEE Access, 2022
Aviation safety has been an eternal theme, and safety assessment is taken as the important method to assess the aircraft safety, but it is difficult to assess the safety of a heavy equipment airdrop from a transport aircraft due to mission complexity and
Jihui Xu, Wenjie Tian, Lijuan Kan, Yujin Chen   +3 more
doaj   +1 more source

A Computational Method for the Nonlinear Attainable Moment Set of Tailless UAVs in Flight-Control-Oriented Scenarios

Drones
Tailless unmanned aerial vehicles (UAVs) achieve high-agility maneuvers with flight control systems. The attainable moment set (AMS) provides critical theoretical foundations and constraints for their optimization.
Linxiao Han, Peng Zhang, Yingyang Wang, Yuan Bian, Jianbo Hu   +4 more
doaj   +1 more source

Characteristic Analysis on UAV-MIMO Channel Based on Normalized Correlation Matrix

The Scientific World Journal, 2014
Based on the three-dimensional GBSBCM (geometrically based double bounce cylinder model) channel model of MIMO for unmanned aerial vehicle (UAV), the simple form of UAV space-time-frequency channel correlation function which includes the LOS, SPE, and ...
Gao Xi jun, Chen Zi li, Hu Yong Jiang
doaj   +1 more source

Design of Pseudo-Command Restricted Controller for Tailless Unmanned Aerial Vehicles Based on Attainable Moment Set

Drones
This work investigates the pseudo-command restricted problem for tailless unmanned aerial vehicles with snake-shaped maneuver flight missions. The main challenge of designing such a pseudo-command restricted controller lies in the fact that the necessity
Linxiao Han, Jianbo Hu, Yingyang Wang, Jiping Cong, Peng Zhang   +4 more
doaj   +1 more source

Multi-Object Tracking with Distributed Drones’ RGB Cameras Considering Object Localization Uncertainty

Drones
Reliable 3D multi-object tracking (MOT) using distributed drones remains challenging due to the lack of active sensing and the ambiguity in associating detections from different views. This paper presents a passive sensing framework that integrates multi-
Xin Liao, Bohui Fang, Weiyu Shao, Wenxing Fu, Tao Yang   +4 more
doaj   +1 more source

Improving the Best-Worst Method Based on Optimal Completion of Incomplete Pairwise Comparison Matrix

IEEE Access, 2022
In this paper, the pairwise comparison matrix (PCM) of the best-worst method (BWM) is regarded as a special incomplete PCM (IPCM), and an improved method based on the optimal completion of the IPCM, called BWM-IPCM, is proposed.
Shihui Wu, Bo He, Xiaodong Liu
doaj   +1 more source