High-energy laser weapons since the early 1960s

Cook, Joung R.

doi:10.1117/1.oe.52.2.021007

Cited by 25 publications

(8 citation statements)

References 4 publications

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“…The keyhole is caused by vaporization-induced recoil pressure, and its dynamics are inherently difficult to understand due to its complex dependence on many physical mechanisms. However, quantifying keyholes is critical because it is closely related to energy absorption and defect formation in a wide range of industrial and military applications, including laser-based materials processing and manufacturing 23 , high-energy laser weapons 24 , and aerospace laser-propulsion engines 25 .…”

Section: Resultsmentioning

confidence: 99%

Data-driven discovery of dimensionless numbers and governing laws from scarce measurements

et al. 2022

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Dimensionless numbers and scaling laws provide elegant insights into the characteristic properties of physical systems. Classical dimensional analysis and similitude theory fail to identify a set of unique dimensionless numbers for a highly multi-variable system with incomplete governing equations. This paper introduces a mechanistic data-driven approach that embeds the principle of dimensional invariance into a two-level machine learning scheme to automatically discover dominant dimensionless numbers and governing laws (including scaling laws and differential equations) from scarce measurement data. The proposed methodology, called dimensionless learning, is a physics-based dimension reduction technique. It can reduce high-dimensional parameter spaces to descriptions involving only a few physically interpretable dimensionless parameters, greatly simplifying complex process design and system optimization. We demonstrate the algorithm by solving several challenging engineering problems with noisy experimental measurements (not synthetic data) collected from the literature. Examples include turbulent Rayleigh-Bénard convection, vapor depression dynamics in laser melting of metals, and porosity formation in 3D printing. Lastly, we show that the proposed approach can identify dimensionally homogeneous differential equations with dimensionless number(s) by leveraging sparsity-promoting techniques.

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Section: Resultsmentioning

confidence: 99%

Data-driven discovery of dimensionless numbers and governing laws from scarce measurements

et al. 2022

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“…programs, such as Airborne Laser Laboratory (ALL), Airborne Laser (ABL), Advanced Tactical Laser (ATL), Aeroadaptive Aero-optic Beam Control (ABC), and High Energy Liquid Laser Area Defense System (HELLADS) [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Impact of High Energy Laser Weapon on the Mission Effectiveness of Unmanned Combat Aerial Vehicles

2020

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With the rapid development of high energy laser weapons (HELWs), the integration of HELW on unmanned combat aerial vehicles (UCAVs) has become a hot research topic. To study the impact of HELW on UCAV mission effectiveness, this paper proposes a 4-level design framework based on the systemof-system (SoS) oriented design. To validate the framework, the impact of HELW is analyzed in four aspects: the strike capability, the stealth performance, the vulnerability, and the defense capability, where the UCAV design constrains are noted. Simulation experiments of penetration scenario are carried out using agent-based modeling and simulation. The simulation results show that the integration of HELW can increase the survivability and mission effectiveness rate (MER) of the UCAV, especially for UCAVs with high speed and stealth performance. But the MER of the UCAV does not increase with the increase of HELW output power in most cases, indicating the importance of balancing the HELW and UCAV performances in concept design. INDEX TERMS High energy laser, unmanned combat aerial vehicle, system-of-systems oriented design, mission effectiveness evaluation, agent-based modeling and simulation.

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“…These systems can be implemented in a wide variety of engineering applications from telecommunications, material treatment, welding [3] or defense applications [4]. Recent literature reports achievement of higher than 30 kW optical power laser demonstrations [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Parametric Analysis of Thermal Blooming for High Energy Lasers Considering the Atmospheric Environment

Coronel¹,

Alameri²,

Pantoja³

et al. 2020

Preprint

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Many studies were dedicated to the analysis of the propagation of High Energy Laser beams in free space. Laser beams propagation performance in the presence of atmospheric constituents may degrade by some interrelated linear and nonlinear phenomena. In this study, it is proposed a self-contained model including non-linear air temperature effect producing thermal distortion in laser propagation. In order to better understand the underlying phenomena, a set of quantifiers are described leading to the characterization of the laser thermal distortion. A parametric study is finally proposed in order to highlight the influence of the different parameters of the simulations.

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High-energy laser weapons since the early 1960s

Cited by 25 publications

References 4 publications

Data-driven discovery of dimensionless numbers and governing laws from scarce measurements

Data-driven discovery of dimensionless numbers and governing laws from scarce measurements

Modeling the Impact of High Energy Laser Weapon on the Mission Effectiveness of Unmanned Combat Aerial Vehicles

Parametric Analysis of Thermal Blooming for High Energy Lasers Considering the Atmospheric Environment

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