Results 41 to 50 of about 379,882 (307)

Three dimensional cooperative guidance for intercepting a manoeuvering target

IET Control Theory & Applications
In this paper, an optimal distributed guidance law is proposed for cooperatively intercepting a manoeuvering target in three dimensional (3D) framework. Based on the 3D kinematic model of interceptors and the target, the kinematic engagement equations in
Chang Yu, Bing Zhu, Jianying Zheng, Wei Wang   +3 more
doaj   +1 more source

Development of a new four-disc friction-free ball valve

You-qi chuyun, 2021
In order to solve the problems of large operating torque, easy internal leakage and poor anti-fouling capability of the general ball valves in the oil and gas pipelines, a new type of four-disc friction-free ball valve was designed based on the existing ...
Yulong FENG, Kangxin YANG, Changqun YANG, Xinfeng YANG, Zhenning YANG   +4 more
doaj   +1 more source

Weight Control System [PDF]

, 1969
Weight Control System, a set of linked computer programs which provides weight and balance reports from magnetic tape files, provides weight control and reporting on launch vehicle programs.
Dyer, A., Jr., Ferrara, P. W., Luke, H. P.   +2 more
core   +1 more source

Anisotropic Boundary Layer Adaptivity of Multi-Element Wings

, 2014
Multi-element wings are popular in the aerospace community due to their high lift performance. Turbulent flow simulations of these configurations require very fine mesh spacings especially near the walls, thereby making use of a boundary layer mesh ...
Chitale, Kedar C., Jansen, Kenneth E., Rasquin, Michel, Sahni, Onkar, Shephard, Mark S.   +4 more
core   +1 more source

Innovating Aircraft Repair Processes: The Role of Digitalization in Sustainability

Advanced Engineering Materials, EarlyView.
This research explores how digitalization—by storing detailed non‐destructive testing data in structured DICONDE databases and creating a standard data model of the component—innovates aviation maintenance and repair processes. Coupled with a developed state‐based simulation model, it enables data‐driven, sustainable repair strategies that reduce waste,
Johanna Aigner, Geo Jacob, Florian Raddatz, Gerko Wende   +3 more
wiley   +1 more source

Multi‐target cognitive electronic reconnaissance for unmanned aerial vehicles based on scene reconstruction

IET Radar, Sonar & Navigation
Model‐free deep reinforcement learning (DRL) is regarded as an effective approach for multi‐target cognitive electronic reconnaissance (MCER) missions. However, DRL networks with poor generalisation can significantly reduce mission completion rates when ...
Yun Zhang, Shixun You, Yunbin Yan, Qiaofeng Ou, Jie Liu, Ling Chen, Xiang Zhu   +6 more
doaj   +1 more source

Polychronous Interpretation of Synoptic, a Domain Specific Modeling Language for Embedded Flight-Software [PDF]

, 2009
The SPaCIFY project, which aims at bringing advances in MDE to the satellite flight software industry, advocates a top-down approach built on a domain-specific modeling language named Synoptic.
Besnard, Loïc, Bodeveix, Jean-Paul, Buisson, Jérémy, Cortier, Alexandre, Dagnat, Fabien, Filali, M, Garcia, G., Gautier, Thierry, Ouy, Julien, Pantel, Marc, Rugina, Ana-Elena,, Strecker, Martin, Talpin, Jean-Pierre   +12 more
core   +6 more sources

A Concept of a Digital and Traceable Manufacturing Documentation Based on Formalized Process Description Applied on Composite Aircraft Moveable

Advanced Engineering Materials, EarlyView.
The documentation of component manufacture has become an essential part of today's production processes, especially for the analysis and optimization of production or component design with regard to structural performance, economic efficiency, and sustainability.
Björn Denker, Dominik Delisle, Christian Krombholz, Martin Rädel, Frank Dressel   +4 more
wiley   +1 more source

Enabling Digital Continuity in Virtual Manufacturing for Eco‐Efficiency Assessment of Lightweight Structures by Means of a Domain‐Specific Structural Mechanics Language: Requirements, Idea and Proof of Concept

Advanced Engineering Materials, EarlyView.
This article presents a solver‐agnostic domain‐specific language (DSL) for computational structural mechanics that strengthens interoperability in virtual product development. Using a hierarchical data model, the DSL enables seamless exchange between diverse simulation tools and numerical methods.
Martin Rädel, Andreas Schuster, Felix Schoenitz, Jean Lefèvre   +3 more
wiley   +1 more source

Delay-Adaptive Federated Filtering with Online Model Calibration for Deep Space Multi-Spacecraft Orbit Determination

Aerospace
Precise orbit determination for multi-spacecraft deep space missions faces challenges including long communication delays, sparse tracking, dynamic model uncertainties, and inefficient data fusion.
Meng Li, Yuanlin Zhang, Jing Kong, Xiaolan Huang, Kehua Shi, Ge Guo, Naiyang Xue   +6 more
doaj   +1 more source