Results 81 to 90 of about 91,301 (286)

Transient Simulation of Aerodynamic Load Variations on Carrier-Based Aircraft During Recovery in Carrier Airwake

open access: yesAerospace
Carrier-based aircraft recovery is a critical and challenging phase in maritime operations due to the turbulent airwake generated by aircraft carriers, which significantly increases the workload of flight control systems and pilots.
Xiaoxi Yang   +4 more
doaj   +1 more source

The Contribution of Global Alliances to Airlines’ Environmental Performance [PDF]

open access: yes, 2019
Global alliances have traditionally been related to improvements in the economic and operational performances of companies, particularly in the airline industry.
Payán Sánchez, Belén   +2 more
core   +1 more source

Optimization of an avionic VCSEL-based optical link through large signal characterization [PDF]

open access: yes, 2008
Optical communication systems have been widely preferred for network communications, especially for Datacoms Local Area Network links. The optical technology is an excellent candidate for on-board systems due to the potential weight saving and EMC ...
Gambardella, Eddie   +3 more
core   +1 more source

Thermally Programmable Two‐Port Non‐Hermitian Acoustic Metastructure for Broadband and Direction‐Dependent Absorption

open access: yesAdvanced Science, EarlyView.
A thermally programmable two‐port non‐Hermitian acoustic metastructure is presented, where temperature acts as a non‐geometric tuning variable. Thermal modulation reconfigures impedance matching and loss‐leakage coupling, enabling exceptional‐point driven, broadband, and direction‐dependent sound absorption without requiring geometric reconfiguration ...
Zichao Guo   +6 more
wiley   +1 more source

Fault-Tolerant Control for Carrier-Based Aircraft Automatic Landing Subject to Multiple Disturbances and Actuator Faults

open access: yesInternational Journal of Aerospace Engineering
This paper introduces a fault-tolerant control scheme for the automatic carrier landing of carrier-based aircraft using direct lift control. The scheme combines radial basis function neural network and active disturbance rejection control (RBF-ADRC) to ...
Qilong Wu, Qidan Zhu
doaj   +1 more source

Robust C–V Ratio Technique for Profiling Defects in Proton‐Irradiated 4H‐SiC

open access: yesAdvanced Electronic Materials, EarlyView.
A noise‐robust C–V ratio technique is introduced to profile radiation‐induced defects in proton‐irradiated 4H‐SiC Schottky diodes. By using analytical capacitance ratios instead of numerical differentiation, the method directly extracts trap‐density and effective trap‐energy profiles at room temperature.
Kibeom Kim   +4 more
wiley   +1 more source

Intelligent simulation and decision support for abnormal carrier-based aircraft takeoff and landing using large models

open access: yesZhongguo Jianchuan Yanjiu
ObjectiveThe launch and recovery of carrier-based aircraft are characterized by rare incident occurrences, high unpredictability, and severe consequences.
Dong CHEN   +6 more
doaj   +1 more source

Leveraging Digital Advanced Manufacturing to Enable Polymer Electrolyte Fuel Cells With Ultrahigh Gravimetric Power Density

open access: yesAdvanced Energy Materials, EarlyView.
This study employs digital advanced manufacturing to develop lightweight, compact porous distributors as alternatives to conventional bipolar plates in PEM fuel cells. A graphene‐coated nickel foam achieves a power density of 1.52 W cm−2, while titanium‐based designs deliver lightweight solutions: an LPBF‐fabricated Gyroid lattice reaches 1.36 W cm−2 ...
Hadi Heidary   +9 more
wiley   +1 more source

Robust Preview Control and Autoregressive Prediction for Aircraft Automatic Carrier Landing

open access: yesIEEE Access, 2019
This paper studies an automatic carrier landing control problem of fixed-wing aircraft with system uncertainties under the airwake and deck motion disturbances.
Ziyang Zhen   +3 more
doaj   +1 more source

Attitude Determination from Single-Antenna Carrier-Phase Measurements

open access: yes, 2002
A model of carrier phase measurement (as carried out by a satellite navigation receiver) is formulated based on electromagnetic theory. The model shows that the phase of the open-circuit voltage induced in the receiver antenna with respect to a local ...
Bohnert J. I.   +7 more
core   +1 more source

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