Results 51 to 60 of about 1,141,804 (335)

Diversity techniques for omnidirectional telemetry coverage of the HiMAT research vehicle [PDF]

, 1981
The highly maneuverable aircraft technology (HiMAT) remotely piloted research vehicle (RPRV) was flight tested and a number of technological advances applicable to future fighter aircraft were demonstrated.
Harney, P. F.
core   +1 more source

Effect of stitching parameters on mechanical properties of foam-core sandwich structure composites

Cailiao gongcheng, 2022
The stitched foam-core sandwich composites with different stitching methods and stitch density were manufactured using vacuum assisted resin infusion (VARI) molding process.
XU Xuehong, ZHENG Yizhu, CHEN Jiping, NING Bo, LIU Xiaochen   +4 more
doaj   +1 more source

Current Trends and Future Perspective for Cold Spray Metal‐Ceramic Composites

Advanced Engineering Materials, EarlyView.
The use of cold spray (CS) technology for creating cermet deposits, combining ceramic and metallic components, is advancing rapidly. Cermets offer excellent temperature handling and erosion resistance for diverse applications. This review outlines the current state of the art, focusing on the deposition dynamics and strategies to optimize the ...
Romario A. Wicaksono, Amir Ardeshiri Lordejani, Sara Bagherifard   +2 more
wiley   +1 more source

Prescribed performance control approaches, applications and challenges: A comprehensive survey

Asian Journal of Control, Volume 25, Issue 1, Page 241-261, January 2023., 2023
Abstract As to control systems, transient performance is as important as steady‐state performance. For some special dynamic systems, transient performance is a more prior index in comparison with the steady‐state one. Prescribed performance control (PPC) has been proved to be a powerful tool that guarantees control system outputs/errors with desired ...
Xiangwei Bu
wiley   +1 more source

Velocity vector control system augmented with direct lift control [PDF]

, 1981
A pilot-controlled stability control system that employs direct lift control (spoiler control) with elevator control to control the flight path angle of an aircraft is described.
Kelly, W. W., Tisdale, H. F., Sr.
core   +1 more source

Revealing the γ′ and γ″ Phase Fractions of Additively Manufactured and Differently Heat‐Treated Nickel‐Base Superalloy IN718 by Atom Probe Tomography and Their Impact on Mechanical Properties

Advanced Engineering Materials, EarlyView.
Additive manufacturing is a promising route for the production of Ni‐base superalloys for turbine applications, such as Inconel 718. Nonetheless, it induces various changes in the microstructure and performance of these materials. One such change is the incidence of the δ‐Ni3Nb phase, whose impact on microstructure, aging precipitate fractions, and ...
Guilherme Maziero Volpato, Jan Vollhüter, Benedikt Diepold, Martin Sebastian Meier, Martin Pröbstle, Mathias Göken, Thomas Niendorf, Peter Felfer, Steffen Neumeier   +8 more
wiley   +1 more source

Progress, challenges, and future steps in data assimilation for convection‐permitting numerical weather prediction: Report on the virtual meeting held on 10 and 12 November 2021

Atmospheric Science Letters, Volume 24, Issue 1, January 2023., 2023
We report on a meeting on progress and challenges in convection‐permitting data assimilation. Novel developments include the assimilation of novel observations such as cloud‐affected satellite radiances, ground‐based profiling networks and aircraft data, as well as methodological advancements in error covariance modelling, and progress in operational ...
Guannan Hu, Sarah L. Dance, Ross N. Bannister, Hristo G. Chipilski, Oliver Guillet, Bruce Macpherson, Martin Weissmann, Nusrat Yussouf   +7 more
wiley   +1 more source

Aircraft turning ground maneuvers [PDF]

, 2017
In this project a fully parameterized mathematical model of an aircraft turning on the ground in order to get the maximum aircraft speed and minimum infrastructure taxiway radius for three different types of aircrafts (A320, A380 and B737) is developed.
Roca, Guillem
core  

Error control method using crossed axes strategy in the five-axis thread milling process

Scientific Reports
Thread milling plays a critical role in the machining of aviation components. However, for parts with complex shapes and high precision requirements, traditional three-axis milling often results in significant errors, making it difficult to meet the ...
Jinjie Jia, Wenyuan Song, Mingcong Huang, Ye Zhang, Xinman Yuan, Xicheng Zhang, Dan Tang, Tingyu Zhang, Zhao Xue, Yan Jiang   +9 more
doaj   +1 more source

Advances in Hybrid Icing and Frosting Protection Strategies for Optics, Lens, and Photonics in Cold Environments Using Thin‐Film Acoustic Waves

Advanced Engineering Materials, EarlyView.
This article provides a comprehensive overview of fundamentals and recent advances of transparent thin‐film surface acoustic wave technologies on glass substrates for monitoring and prevention/elimination of fog, ice, and frost. Fogging, icing, or frosting on optical lenses, optics/photonics, windshields, vehicle/airplane windows, and solar panel ...
Hui Ling Ong, Zhangbin Ji, Luke Haworth, Yihao Guo, Jaime del Moral, Stefan Jacob, Ana Borras, Agustin R. Gonzalez‐Elipe, Jikai Zhang, Jian Zhou, Glen McHale, Yong‐Qing Fu   +11 more
wiley   +1 more source