Готові списки джерел за темами / Lightcraft

Добірка наукової літератури з теми "Lightcraft"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 29 січня 2023

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Статті в журналах з теми "Lightcraft"

1

Scharring, S., H. A. Eckel, and H. P. Röser. "Beam-Riding of a Parabolic Laser Lightcraft." International Journal of Aerospace Innovations 3, no. 1 (March 2011): 15–31. http://dx.doi.org/10.1260/1757-2258.3.1.15.

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2

Wang, Ten-See, Yen-Sen Chen, Jiwen Liu, Leik N. Myrabo, and Franklin B. Mead. "Advanced Performance Modeling of Experimental Laser Lightcraft." Journal of Propulsion and Power 18, no. 6 (November 2002): 1129–38. http://dx.doi.org/10.2514/2.6054.

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3

MYRABO, Leik N. "Brief History of the Lightcraft Technology Demonstrator (LTD) Project." Review of Laser Engineering 34, no. 6 (2006): 423–28. http://dx.doi.org/10.2184/lsj.34.423.

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4

Carrick, Patrick, Franklin Mead Jr., and Leik Myrabo. "LIGHTCRAFT PROPULSION TECHNOLOGY FOR LOW-COST ACCESS TO SPACE." Optics and Photonics News 10, no. 1 (January 1, 1999): 23. http://dx.doi.org/10.1364/opn.10.1.000023.

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5

Xu, Shan-Shu, Zi-Niu Wu, Qian Li, and Yan-Ji Hong. "Hybrid continuum/DSMC computation of rocket mode lightcraft flow in near space with high temperature and rarefaction effect." Computers & Fluids 38, no. 7 (August 2009): 1394–404. http://dx.doi.org/10.1016/j.compfluid.2008.01.024.

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6

Tu. "IMPROVING 3D SURFACE MEASUREMENT OF MECHANICAL DETAILS BY STRUCTURED LIGHT USING HIGH DYNAMIC RANGE." Journal of Military Science and Technology, no. 74 (August 26, 2021): 145–53. http://dx.doi.org/10.54939/1859-1043.j.mst.74.2021.145-153.

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Анотація:
The measurement methods using structured light have the advantage of being fast, accurate, and noncontact with the surface of the object. However, these methods have reached its limitation when measuring mechanical details with high surface gloss, due to the unpredictable reflection of incident rays after reaching to object’s surface that, consequently, leads to the simultaneous appearance of several regions with different brightness. To address this problem, we proposed a method of synthesizing extended dynamic range images based on changing the exposure time of the camera and adjusting the illumination of the projector light source so that 3D point coordinates in both bright and dark areas could be obtained through the process. The dual-camera structured light experimental model and the lightcrafter 4500 projector are synchronized through the trigger, using the gray code in combination with the line-shift projection pattern. Experimental results show that the proposed method can precisely reconstruct the 3D surface of mechanical details, while providing higher performance than the state-of-the-art methods.
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7

Ballard, Christopher G., Kurt S. Anderson, and Leik Myrabo. "Flight Dynamics and Simulation of Laser Propelled Lightcraft." Journal of Computational and Nonlinear Dynamics 4, no. 4 (August 24, 2009). http://dx.doi.org/10.1115/1.3187214.

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A seven degree-of-freedom (7DOF) dynamic model was developed to provide insight into the flight behavior of Type 200 and other related lightcraft, and to serve as a research tool for developing future engine-vehicle configurations for laser launching of nanosatellites (1–10+kg). Accurate engine, beam, and aerodynamics models are included to improve the predictive capability of the 7DOF code. The aerodynamic forces of lift, drag, and aerodynamic pitching moment were derived from FLUENT® computational fluid dynamics predictions, and calibrated against limited existing wind tunnel data. To facilitate 7DOF model validation, simulation results are compared with video analysis of actual flights under comparable conditions. Despite current limitations of the 7DOF model, the results compared well with experimental flight trajectory data.
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Дисертації з теми "Lightcraft"

1

Harrland, Alan. "Hypersonic inlet for a laser powered propulsion system." Thesis, 2012. http://hdl.handle.net/2440/79072.

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The idea of laser powered lightcraft was first conceptualised in the early 1970's as a means of launching small scale satellite payloads into orbit at a much lower cost in comparison to conventional techniques. Propulsion in the lightcraft is produced via laser induced detonation of the incoming air stream, which results in the energy source for propulsion being decoupled from the vehicle. In air breathing mode the lightcraft carries no onboard fuel or oxidiser, allowing theoretically infinite specific impulses to be achieved. Recently interest has been renewed in this innovative technology through cross-continent and industry research programs aimed at making laser propulsion a reality. In a ground launched satellite, the vehicle must travel through the atmosphere at speeds greatly in excess of the speed of sound in order to achieve the required orbital velocities. Supersonic, and in particular hypersonic, flight regimes exhibit complicated physics that render traditional subsonic inlet design techniques inadequate. The laser induced detonation propulsion system requires a suitable engine configuration that offers good performance over all flight speeds and angles of attack to ensure the required thrust is maintained throughout the mission. Currently a hypersonic inlet has not been developed for the laser powered lightcraft vehicle. Stream traced hypersonic inlets have demonstrated the required performance in conventional hydrocarbon fuelled scramjet engines. This design technique is applied to the laser powered lightcraft vehicle, with its performance evaluated against the traditional lightcraft inlet design. Four different hypersonic lightcraft inlets have been produced employing both the stream traced inlet design methodology, and traditional axi-symmetric inlet techniques. This thesis outlines the inlet design methodologies employed, with a detailed analysis of the performance of the lightcraft inlet at angles of attack and off-design conditions. Fully three-dimensional turbulent computational fluid dynamics simulations have been performed on a variety of inlet configurations. The performance of the lightcraft inlets have been evaluated at differing angles of attack. An idealised laser detonation simulation has also been performed to verify that the lightcraft inlet does not unstart during the laser powered propulsion cycle.
Thesis (M.Phil.) -- University of Adelaide, School of Mathematical Sciences, 2012
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2

Harbison, Brian P. "The Lightcroft Estate : Hagerstown, Indiana home of Charles and Leora Teetor." 2011. http://liblink.bsu.edu/uhtbin/catkey/1656584.

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Анотація:
This final creative project involved preparation of a cultural landscape report for the properties that were previously known as The Lightcroft Estate. This study has determined the historical significance of The Lightcroft Estate as a designed historic landscape and presents preservation guidelines for future improvement at the site. Historical evidence indicates that the Lightcroft Estate was developed over a period of forty-three years under the direction of Mr. and Mrs. Charles N. Teetor with the services of an architect Charles E. Werking and the possible collaboration of an engineer, John W. Mueller. Existing features in the landscape surrounding the home suggest an extensive landscape that included a Japanese Garden, two fishing lakes, a formal garden with tea house, pergola, fountains and basins, a power house/roller wheel with adjacent water works and water features throughout the landscape. The home and the grounds are found to be significant for its association with the Country Place Era in landscape architecture and the role the Teetor family served in bringing prosperity to their family and community during the industrial revolution and early automotive industry. A cultural landscape report is presented which follows the Secretary of the Interior’s Standards for the Treatment of Historic Properties with Guidelines for the Treatment of Cultural Landscapes. Treatment recommendations are presented which focus on the preservation of existing features, reconstruction of the formal garden.
Department of Landscape Architecture
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Книги з теми "Lightcraft"

1

NASA/USRA University Advanced Design Program. Summer Conference. Apollo lightcraft project. Edited by Antonison Mark A and George C. Marshall Space Flight Center. [Washington, D.C: National Aeronautics and Space Administration, 1989.

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2

NASA/USRA University Advanced Design Program. Summer Conference. Apollo lightcraft project. Edited by Myrabo Leik, Smith Wayne L, De Cusatis Casimer M, and United States. National Aeronautics and Space Administration. [Washington, D.C: National Aeronautics and Space Administration, 1988.

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3

National Aeronautics and Space Administration (NASA) Staff. Laser Lightcraft Performance. Independently Published, 2018.

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4

United States. National Aeronautics and Space Administration., ed. Apollo lightcraft project: Prepared for the NASA/USRA Advanced Design Program, 3rd annual summer conference, Washington, D.C., June 17-19, 1987. [Washington, D.C: National Aeronautics and Space Administration, 1987.

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Тези доповідей конференцій з теми "Lightcraft"

1

Suter, Alex, Dan Lobl, Victor Schutz, and Brian Gee. "LightCraft." In SIGGRAPH '16: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/2897839.2927464.

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2

Bohn, Willy L. "Laser lightcraft performance." In Advanced High-Power Lasers and Applications, edited by Claude R. Phipps and Masayuki Niino. SPIE, 2000. http://dx.doi.org/10.1117/12.376982.

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3

ANTONISON, M., W. SMITH, and L. MYRABO. "The Apollo Lightcraft Project." In Aircraft Design, Systems and Operations Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/6.1988-4486.

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4

Schall, Wolfgang O. "Lightcraft experiments in Germany." In High-Power Laser Ablation III. SPIE, 2000. http://dx.doi.org/10.1117/12.407369.

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5

Schall, Wolfgang O., Hans-Albert Eckel, Wilhelm Mayerhofer, Wolfgang Riede, and Eberhard Zeyfang. "Comparative lightcraft impulse measurements." In International Symposium on High-Power Laser Ablation 2002, edited by Claude R. Phipps. SPIE, 2002. http://dx.doi.org/10.1117/12.482046.

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6

Apollonov, Victor V., Vadim V. Kijko, Victor I. Kislov, and V. N. Tischenko. "Pulse-periodic lasers for lightcraft application." In Prague -- 2004 DL over. SPIE, 2005. http://dx.doi.org/10.1117/12.611521.

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7

Apollonov, Victor V. "High power lasers for Lightcraft applications." In Congress on Optics and Optoelectronics, edited by Krzysztof M. Abramski, Antonio Lapucci, and Edward F. Plinski. SPIE, 2005. http://dx.doi.org/10.1117/12.620526.

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8

Davis, Eric W., Franklin B. Mead, and Andrew V. Pakhomov. "Review Of Laser Lightcraft Propulsion System." In BEAMED ENERGY PROPULSION: Fifth International Symposium on Beamed Energy Propulsion. AIP, 2008. http://dx.doi.org/10.1063/1.2931899.

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9

Scharring, Stefan, Hans-Albert Eckel, Jens Trommer, Hans-Peter Röser, Christian Eigenbrod, and Andrew V. Pakhomov. "Spaceborne Lightcraft Applications—an Experimental Approach." In BEAMED ENERGY PROPULSION: Fifth International Symposium on Beamed Energy Propulsion. AIP, 2008. http://dx.doi.org/10.1063/1.2931900.

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10

Kenoyer, David A., Kurt S. Anderson, and Leik N. Myrabo. "Trajectory Simulations for Laser-Launched Microsatellites Using a 7-DOF Flight Dynamics Model." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86664.

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Анотація:
Laser launch trajectories are being developed for boosting nano- and micro-satellite sized payloads (i.e., 1 to 100 kg) using a 7-Degree Of Freedom (DOF) flight dynamics model that has been extensively calibrated against 16 actual trajectories of small scale model lightcraft flown at White Sands Missile Range, NM on a 10 kW pulsed CO2 laser called PLVTS. The full system 7-DOF model is comprised of individual aerodynamics, engine, laser beam propagation, variable vehicle inertia, reaction controls system, and dynamics models, integrated to represent all major phenomena in a consistent framework. The suborbital trajectory results presented herein are for a 240 cm diameter lightcraft (100 kg payload; 100 MW beam power) flown under three different laser-boost scenarios: 1) liftoff and vertical climb-out on a vertically oriented laser beam; 2) liftoff and climb-out along a constant laser beam pointing angle (fixed azimuth and zenith) defined relative to the launch pad; 3) liftoff and climb-out on a beam with a time-varying pointing schedule (azimuth and zenith) to “slingshot” the lightcraft laterally, making maximum use of the engine’s autonomous beam-riding feature. For simplicity, simulations assume a solid ablative rocket propellant (e.g., Teflon®-like performance) with a vacuum specific impulse of 644 seconds, momentum coupling coefficient of 190 N/MW, and overall efficiency of 60%. This flight dynamics model and associated 7-DOF code provide a physics-based predictive tool for basic research investigations into laser launched lightcraft for suborbital and orbital missions. An investigative protocol was developed to identify and quantify phenomena that dominate each phase of the launch trajectory. These protocols are specified herein, along with physics-based explanations for such phenomena, both predicted and observed.
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Звіти організацій з теми "Lightcraft"

1

Schall, Wolfgang O., Hans-Albert Eckel, and Sebastian Walther. Lightcraft Impulse Measurements under Vacuum. Fort Belvoir, VA: Defense Technical Information Center, August 2003. http://dx.doi.org/10.21236/ada417732.

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2

Mead, Frank. The Lightcraft Technology Demonstrator (LTD) Program. Fort Belvoir, VA: Defense Technical Information Center, November 1998. http://dx.doi.org/10.21236/ada405839.

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3

Carrick, Patrick, Franklin Mead, Myrabo Jr., and Leik. Lightcraft Propulsion Technology for Low Cost Access to Space. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada386697.

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4

Froning, David, Leon McKinney, Franklin Mead, William Larson, and Alan Pike. Some Results of a Study of the Effectiveness and Cost of a Laser-Powered Lightcraft Vehicle System. Fort Belvoir, VA: Defense Technical Information Center, April 2004. http://dx.doi.org/10.21236/ada422675.

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