Results 31 to 40 of about 19,013 (214)
Helicopter Rotor Thickness Noise Control Using Unsteady Force Excitation
Applied Sciences, 2019 The low-frequency in-plane thickness noise generating from the displacement of air by rotating blades has an important influence on helicopter detection.
Yongjie Shi +4 more
doaj +1 more source
Coupled flight dynamics and CFD - demonstration for helicopters in shipborne environment [PDF]
, 2017 The development of high-performance computing and computational fluid dynamics methods have evolved to the point where it is possible to simulate complete helicopter configurations with good accuracy.
Barakos, G.N., Crozon, C., Steijl, R.
core +1 more source
Journal of Field Robotics, Volume 43, Issue 2, Page 655-680, March 2026.ABSTRACT Vision‐based deep learning models have been widely adopted in autonomous agents, such as unmanned aerial vehicles (UAVs), particularly in reactive control policies that serve as a key component of navigation systems. These policies enable agents to respond instantaneously to dynamic environments without relying on pre‐existing maps.
Yingxiu Chang +4 more
wiley +1 more source
IEEE Access, 2022 The mode of future wars is mainly local wars and regional conflicts. This style of war is characterized by unpredictability and instability, which can happen anytime and anywhere.
Zhigang Wang +5 more
doaj +1 more source
Improving rotorcraft survivability to RPG attack using inverse methods [PDF]
, 2009 This paper presents the results of a preliminary investigation of optimal threat evasion strategies for improving the survivability of rotorcraft under attack by rocket propelled grenades (RPGs).
Anderson, D., Thomson, D.G.
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Revealing the Internal Structure of Mars‐Analog Glaciers From Drone‐Based Radar Sounding
Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.Abstract Martian debris‐covered glaciers (DCGs) contain large quantities of water ice beneath a protective layer of rock and dust. Properties of the overlying regolith such as density and depth to ice are critical parameters for guiding in situ resource utilization (ISRU) of water and coring missions targeting potential habitats.
Roberto J. Aguilar +4 more
wiley +1 more source
HeliCAT-DARTS: A High Fidelity, Closed-Loop Rotorcraft Simulator for Planetary Exploration
AerospaceHeliCAT-DARTS is a high-fidelity rotorcraft dynamics simulator developed for the design and development of rotorcraft for planetary exploration. While initially developed for the life cycle use of the Ingenuity Mars Helicopter mission, the simulator now ...
Carl Leake +5 more
doaj +1 more source
Hangkong gongcheng jinzhan, 2019 The redundant manipulations on different control surfaces of tilt-rotorcraft are of great importance for its control reconfiguration. The nonlinear model trim and small perturbation linearization processing result are presented based on the small ...
Ma Cunwang, Wen Jiayu, Song Yanguo
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Attitude Active Disturbance Rejection Control of the Quadrotor and Its Parameter Tuning
International Journal of Aerospace Engineering, 2020 The internal uncertainty and external disturbance of the quadrotor will have a significant impact on flight control. Therefore, to improve the control system’s dynamic performance and robustness, the attitude active disturbance rejection controller (ADRC)
Suiyuan Shen, Jinfa Xu
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Moving Spatial Turbulence Model for High-Fidelity Rotorcraft Maneuvering Simulation
Mathematics, 2022 A moving spatial turbulence model is developed for rotorcraft maneuvering simulation under different flight conditions. The recursive algorithms are adopted to model its distributed longitudinal turbulence components, which are correlated with the ...
Honglei Ji, Linghai Lu, Renliang Chen
doaj +1 more source