Results 31 to 40 of about 1,093,651 (250)

Bifurcation analysis of nose landing gear shimmy with lateral and longitudinal bending [PDF]

, 2009
We develop and study a model of an aircraft nose landing gear with torsional, lateral and longitudinal degrees of freedom. The corresponding three modes are coupled in a nonlinear fashion via the geometry of the landing gear in the presence of a nonzero ...
Thota, P, Thota, Phanikrishna, Lowenberg, Mark, Lowenberg, MH, Krauskopf, B, Krauskopf, Bernd   +5 more
core   +1 more source

Design of an Adaptive Landing Gear with Ground Contact Sensing Capability

Nanjing Hangkong Hangtian Daxue Xuebao
To improve the landing capability of helicopters on complex terrain， this paper proposes an adaptive landing gear with ground contact sensing capability.
LI Qi, MIAO Hongtao, YANG Yun
doaj   +1 more source

Overturning protection control of lunar-planetary lander with semi-active shock absorber

Nihon Kikai Gakkai ronbunshu, 2014
This paper describes the attitude control method for overturning prevention for a lunar planetary lander which uses a semi-active damper on the landing leg.
Takao MAEDA, Masatsugu OTSUKI, Tatsuaki HASHIMOTO   +2 more
doaj   +1 more source

In Situ Determination Of Bottom Trawl Ground Gear Contact

, 2001
No abstracts are to be cited without prior reference to the author.Exact definition of towed distance with proper ground gear contact is an essential parameter in bottom trawl swept area estimates of fish abundance. Errors in this key parameter may lead to a first order bias in abundance estimates of demersal fish.
Engås, Arill, Ona, Egil, Ramberg, Kjell
openaire   +2 more sources

Environment variables affect CPUE and spatial distribution of fishing grounds on the light falling gear fishery in the northwest Indian Ocean at different time scales

Frontiers in Marine Science, 2022
To better develop and protect the pelagic fishery in the northwest Indian Ocean, China’s fishing enterprises have been producing pelagic fisheries in the said area for a long time.
Haibin Han, Haibin Han, Chao Yang, Chao Yang, Heng Zhang, Heng Zhang, Zhou Fang, Zhou Fang, Bohui Jiang, Bohui Jiang, Bing Su, Jianghua Sui, Yunzhi Yan, Delong Xiang, Delong Xiang   +14 more
doaj   +1 more source

Adaptive Nonlinear Dynamic Inversion with Ground Taxiing Dynamics for Trajectory Tracking and Safe Autonomous Take-Off/Landing of Fixed-Wing UAVs

Drones
The design of control systems for aircraft autonomous takeoff and landing, as well as full-flight-envelope operations—including taxiing, takeoff, climb, cruise, descent, and landing—presents significant challenges.
Yingdong Xia, Mingying Huo, Xiyan Zhao, Lehan Wang, Jianfeng Wang, Yuxuan Yao, Guiqi Pan, Cheng Wang, Ze Yu   +8 more
doaj   +1 more source

Bifurcation Analysis of a Coupled Nose Landing Gear-Fuselage System [PDF]

, 2014
Under certain conditions during takeoff and landing, pilots may sometimes experience vibrations in the cockpit. Because the cockpit is located right above the nose landing gear, which is known to potentially be prone to self-excited vibrations at certain
Lowenberg, Mark H, Neild, Simon A, Terkovics, Nandor, Krauskopf, Bernd   +3 more
core   +1 more source

Using Fishermen’s Knowledge and GIS to Identify Fishing Grounds, Gears and Species in the Projected Marine Protected Area ‘Jabal Moussa’

Journal of Sustainability and Environmental Management, 2022
Marine spatial planning and ecosystem based management such as MPA’s has been used as tools to manage human activities, to conserve coastal ecosystems and biodiversity for the sustainable use of oceans, seas and marine resources. In this study, we focused on establishing a spatial distribution of the fishing grounds used by local fishermen in the ...
Mohamed Rida Derdabi, Mustapha Aksissou, Ihssane Toujgani   +2 more
openaire   +1 more source

Analysis of Coordinated Steering Performance in Multi‑wheel Landing Gears

Transactions of Nanjing University of Aeronautics and Astronautics
During aircraft ground steering， the nose landing gear （NLG） tires of large transport aircraft often experience excessive lateral loads， leading to sideslip. This compromises steering safety and accelerates tire wear.
GUI Xiwen, ZHANG Ming, SHI Xiazheng, HU Tianyang, XU Yuhan   +4 more
doaj   +1 more source

A Rational Numerical Method for Simulation of Drop-Impact Dynamics of Oleo-Pneumatic Landing Gear

Applied Sciences, 2021
Oleo-pneumatic landing gear is a complex mechanical system conceived to efficiently absorb and dissipate an aircraft’s kinetic energy at touchdown, thus reducing the impact load and acceleration transmitted to the airframe.
Rosario Pecora
doaj   +1 more source