Results 31 to 40 of about 11,239 (255)

Aircraft navigation based on differentiation–integration observer

Aerospace Science and Technology, 2017
In this paper, a generalized differentiation-integration observer is presented based on sensors selection. The proposed differentiation-integration observer can estimate the multiple integrals and high-order derivatives of a signal, synchronously. The parameters selection rules are presented for the differentiation-integration observer. The theoretical
Wang, Xinhua, Cai, Lilong
openaire   +3 more sources

Monitor for Anti-Aircraft Guidance and Observation Systems [PDF]

Problemy Mechatroniki, 2019
The fire control system operator’s monitor unit displays the video feed from online video cameras and fire control system-generated on-screen data overlays.
Rafał KRUK, Zbigniew REMPAŁA
doaj   +1 more source

Research on a Measurement Method for Middle-Infrared Radiation Characteristics of Aircraft

Machines, 2022
Aiming at the problem wherein temperature inversion accuracy is unstable due to the major differences in atmospheric transmittance under various observation paths, a method for measuring radiation characteristics of an aircraft engine’s hot parts and ...
Xuan Deng, Yueming Wang, Guicheng Han, Tianru Xue   +3 more
doaj   +1 more source

POSSIBILITY OF USE OF THE RIVER BADGE SHIP AS A POTENTIAL AIRCRAFT CARRIER IN THE SECURITY OF LOGISTIC AND CRITICAL INFRASTRUCTURE [PDF]

Scientific Journal of Silesian University of Technology. Series Transport, 2019
This article contains a description and analysis of the hypothetical application of the inland barge as an "aircraft carrier" with observation aircraft, both manned helicopters and unmanned drones.
Jakub MARSZAŁKIEWICZ
doaj   +1 more source

Collaborative Localization Method Based on Hybrid Network for Aerial Swarm

Aerospace
In light of the satellite rejection environment and how aircraft can obtain high-precision positioning, this paper proposes a collaborative correction algorithm for aircraft based on the rank-defect network.
Rong Wang, Huiyuan Zhang, Chen Gu, Zhi Xiong, Jianye Liu   +4 more
doaj   +1 more source

The Impact of the Hunga Tonga–Hunga Ha’apai Volcanic Eruption on the Stratospheric Environment

Atmosphere
In this study, an overview of two years of research findings concerning the 2022 Hunga Tonga–Hunga Ha’apai (HTHH) volcanic eruption in the stratospheric environment is provided, focusing on water vapor, aerosols, and ozone.
Qian Sun, Taojun Lu, Dan Li, Jingyuan Xu
doaj   +1 more source

Validation of XCO₂ derived from SWIR spectra of GOSAT TANSO-FTS with aircraft measurement data [PDF]

Atmospheric Chemistry and Physics, 2013
Column-averaged dry air mole fractions of carbon dioxide (XCO2) retrieved from Greenhouse gases Observing SATellite (GOSAT) Short-Wavelength InfraRed (SWIR) observations were validated with aircraft measurements by the Comprehensive Observation Network ...
M. Inoue, I. Morino, O. Uchino, Y. Miyamoto, Y. Yoshida, T. Yokota, T. Machida, Y. Sawa, H. Matsueda, C. Sweeney, P. P. Tans, A. E. Andrews, S. C. Biraud, T. Tanaka, S. Kawakami, P. K. Patra   +15 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source