Results 71 to 80 of about 179,421 (367)

Hair‐Like Flexible Airflow Sensor for Large‐Area Airflow Sensing

Advanced Science, EarlyView.
A hair‐like flexible airflow sensor is designed for large‐area airflow sensing with carbon fibers implanted on a laser‐induced graphene substrate. The flexible airflow sensor features a wide detection range and fast response time, effectively identifying airflow changes.
Yingxi Xie, Feilong Liu, Yongchao Luo, Na Lin, Xiaohua Wu, Zeji Wu, Longsheng Lu   +6 more
wiley   +1 more source

Highly integrated digital electronic control: Digital flight control, aircraft model identification, and adaptive engine control [PDF]

The highly integrated digital electronic control (HIDEC) program at NASA Ames Research Center, Dryden Flight Research Facility is a multiphase flight research program to quantify the benefits of promising integrated control systems.
Baer-Riedhart, Jennifer L., Landy, Robert J.   +1 more
core   +1 more source

Low‐Frequency Microwave Absorption Composites

Advanced Science, EarlyView.
The microwave absorption principles and low‐frequency performance factors are briefly introduced. Recent progress is systematically summarized in five different based composites. Then detailed analysis focuses on relationships and mechanisms about micro‐structure and macro‐performance.
Mukun He, Kaiyu Zhang, Hua Qiu, Hua Guo, Xiangcheng Li, Yongqiang Guo, Yali Zhang, Junwei Gu   +7 more
wiley   +1 more source

Upper atmosphere pollution measurements (GASP) [PDF]

The environmental effects are discussed of engine effluents of future large fleets of aircraft operating in the stratosphere. Topics discussed include: atmospheric properties, aircraft engine effluents, upper atmospheric measurements, global air sampling,
Holdeman, J. D., Rudey, R. A.
core   +1 more source

Laser‐Engraved Micro‐Patterned rGO/WPU Composite Structures for Aircraft Applications: Synchronizing Electrothermal De‐Icing and Broadband Microwave Transparency

Advanced Science, EarlyView.
While conventional electrothermal materials tend to reflect electromagnetic waves during de‐icing. Inspired by the frequency‐selective surface theory, this paper designs NJPS for rGO/WPU electrothermal coatings based on the traditional Jerusalem structure.
Xu Fu, Yizhou Shen, Lingfeng Zhao, Weixin Zhu, Weilan Liu, Chenliang Li, Yuebin Lin, Zongsheng Ye, Chengfeng Shen   +8 more
wiley   +1 more source

Design and test of aircraft engine isolators for reduced interior noise [PDF]

Improved engine vibration isolation was proposed to be the most weight and cost efficient retrofit structure-borne noise control measure for single engine general aviation aircraft.
Scheidt, D. C., Unruh, J. F.
core   +1 more source

Characterization and Reporting Protocols for Structural Power Composites: A Perspective

Advanced Energy Materials, EarlyView.
Here, the issues for testing and reporting on structural power composites are described: multifunctional materials that can carry loads while providing electrical energy. As well as proposing best practice, the development of a “universal coupon” is recommended for studying these materials and any interactions that occur between the two functions ...
Emile S. Greenhalgh, Sang Nguyen, Leif E. Asp, Alfredo Bici, Alexander Bismarck, Derrick Fam, Mats Johansson, Göran Lindbergh, Jodie L. Lutkenhaus, Milo S. P. Shaffer, Natasha Shirshova, Madhavi Srinivasan, Johanna Xu, Dan Zenkert   +13 more
wiley   +1 more source

Toward Energy Justice Principles for Sustainable Lithium‐Ion Battery Technologies

Advanced Energy and Sustainability Research, EarlyView.
Prefeasibility life cycle assessment is used to evaluate the environmental, social, and supply chain impacts of lithium‐ion battery technologies, and the concept of distributional energy justice is discussed. By comparing chemistries and use cases, it reveals inequities in material sourcing and technology access.
Isabella D. R. Stephens, Jordan J. Lindsay, Robert Pell, Peter Slater, Emma Kendrick   +4 more
wiley   +1 more source

Real-time in-flight thrust calculation on a digital electronic engine control-equipped F100 engine in an F-15 airplane [PDF]

Computer algorithms which calculate in-flight engine and aircraft performance real-time are discussed. The first step was completed with the implementation of a real-time thrust calculation program on a digital electronic engine control (DEEC) equiped ...
Myers, L. P., Ray, R. J.
core   +1 more source

Joint Situational Assessment‐Hierarchical Decision‐Making Framework for Maneuver Intent Decisions

Advanced Intelligent Systems, EarlyView.
This study introduces a new framework for decision‐making in unmanned combat aerial vehicles (UCAVs), integrating graph convolutional networks and hierarchical reinforcement learning (HRL). The method tackles adopts a curriculum‐based training approach guided by cross‐entropy rewards.
Ruihai Chen, Hao Li, Guanwei Yan, Haojie Peng, Qian Zhang   +4 more
wiley   +1 more source