Browsing Journal of Aerospace Engineering by Title
Now showing items 991-1010 of 2238
-
H2 Energy Estimate of Boundary Controlled Vibrating Hybrid Structure Subject to Uncertain Forces
(American Society of Civil Engineers, 2003)We study here a model hybrid system consisting of a flexible rectangular space structure such as a solar cell array, hoisted at one end by a movable rigid hub, set to vibration from certain initial conditions, but subject ... -
Hail Impact Characteristics of a Hybrid Material by Advanced Analysis Techniques and Testing
(American Society of Civil Engineers, 2011)The design of an aerospace structure using an off-the-shelf composite would involve increasing the gauge thickness until all the design requirements are met. This can lead to an inefficient design, because excess margins ... -
Halo Orbit Maintenance around L1 Point of the Sun-Earth System Using Optimal Control and Lyapunov Stability Theory
(ASCE, 2021-09-21)This paper addresses the maintenance of a halo orbit around the L1 point of the Sun-Earth system in a circular restricted three-body problem. To this effect, a trajectory tracking problem is formulated and solved by designing ... -
Handheld Cleaning Tool for Lunar Dust Adhered to Spacesuits Using Magnetic and Electrodynamic Forces<sup>1</sup>
(ASCE, 7/1/2021)The removal of lunar dust adhered to spacesuits is indispensable for crewed lunar exploration. A handheld cleaning tool was developed using magnetic and electrodynamic forces. The tool comprises a stationary multipole ... -
Health Monitoring and Diagnosis of Solid Rocket Motors with Bore Cracks
(American Society of Civil Engineers, 2016)A finite-element-based computational model is used to investigate the effects of bore cracking on stress distributions in solid rocket motors (SRMs) at various storage temperatures. Capabilities of a rocket-motor ... -
Health Monitoring System Developed for Tianjin 117 High-Rise Building
(American Society of Civil Engineers, 2017)Tianjin 117 is a high-rise building comprised of a reinforced-concrete core and perimeter steel framing that includes megacolumns and megabraces, with a height of 597 m. As the construction process goes on, the influences ... -
Heat Flow through Soils and Effects on Thermal Storage Cycle in High-Mass Structures
(American Society of Civil Engineers, 2006)The solar radiation absorbed in massive building components is stored and later emitted as long-wave thermal radiation into the interior space. Heat storage capacity is directly related to the mass of the building envelope ... -
Heat Transfer Behaviors on Combinational Insulation of Spray-On Foam and Variable Density Multilayer for Cryogenic Propellant Tanks
(American Society of Civil Engineers, 2019)Efficient and reliable thermal insulation for cryogenic propellant storage in orbit is an essential ingredient for long-duration missions in future space exploration. A new combinational thermal insulation composed of ... -
Heave-Pitch Motions of a Platform Flying in Extreme Ground Effect
(American Society of Civil Engineers, 2012)High-payload platforms flying in extreme-ground-effect represent a promising concept for high-speed amphibious transportation. Their dynamics is governed, to a large extent, by unsteady airflow under the platform. A ... -
Hedratecture and Expandable Platform
(American Society of Civil Engineers, 1990)This paper is directed only to the basic aspects of hedratecture. The word hedratecture is derived from the Greek “to build with hedrons.” It is used to describe the art and science of constructing with framed elements ... -
Hierarchical Collaborative Navigation Method for UAV Swarm
(ASCE, 1/1/2021)Unmanned aerial vehicle (UAV) swarm technology can expand the working scope of tasks and improve the overall task efficiency. Traditional single leader-follower fusion algorithms for cooperative navigation cannot fully ... -
Hierarchical High-Fidelity Analysis Methodology for Buckling Critical Structures
(American Society of Civil Engineers, 2005)A hierarchical high-fidelity analysis methodology for predicting the critical buckling load of compression-loaded thin-walled isotropic shells is described. This hierarchical procedure includes three levels of fidelity for ... -
Hierarchical Model-Based Approach to Testability Modeling and Analysis for PHM of Aerospace Systems
(American Society of Civil Engineers, 2014)A prognostics and health management (PHM) technique has been developed and applied to a variety of safety-critical aerospace systems. The PHM performance relies highly on test data, which conveys relevant system health ... -
High Fidelity Flight Simulation of Small Aircraft over Tall Buildings
(ASCE, 2022/11/01)Aerodynamic effects on small aircraft flying over tall buildings are studied. Flow is modeled using unsteady Navier–Stokes equations. The effects of buildings on the stability of aircraft are studied by time-accurately ... -
High-Performance Computing for Large-Scale Analysis, Optimization, and Control
(American Society of Civil Engineers, 2000)Research papers published on parallel processing, supercomputing, and distributed computing since 1994 are reviewed in this article. The focus is on review of the archival journal articles published in three areas: analysis, ... -
High-Speed Centrifugal Compressor Instabilities during Speed Transients
(American Society of Civil Engineers, 2004)Quasi-steady instability initiation studies do not model the actual operation of a compressor in an installed engine. Namely, gas turbine engine compressors are subject to transient operation. To provide needed high-speed ... -
High-Speed Surfactant-Free Fabrication of Large Carbon Nanotube Membranes for Multifunctional Composites
(American Society of Civil Engineers, 2016)A high-speed manufacturing process for multiwalled carbon nanotube (MWNT) buckypaper is presented, and its application as an embedded strain sensor for composite materials is demonstrated. This manufacturing method enables ... -
High-Speed Surfactant-Free Fabrication of Large Carbon Nanotube Membranes for Multifunctional Composites
(American Society of Civil Engineers, 2016)A high-speed manufacturing process for multiwalled carbon nanotube (MWNT) buckypaper is presented, and its application as an embedded strain sensor for composite materials is demonstrated. This manufacturing method enables ... -
High-Temperature Microwave Dielectric Properties and Processing of JSC-1AC Lunar Simulant
(American Society of Civil Engineers, 2013)Successful development of extraterrestrial microwave heating technologies depends on the study of the dielectric properties that control the microwave heating behavior of simulants and regoliths. Microwave heating may serve ... -
Highly Efficient Selective Assembly Method of Horizontal Stabilizer based on Metamodeling and Particle Swarm Optimization
(American Society of Civil Engineers, 2015)Selective assembly is a cost-effective approach for reducing the overall variation and thus improving the quality of an assembled product. Traditional selective assembly requires quite a large number of finite-element ...