Reduction and reconstruction strategy of active thermal control system based on unsupervised learning and thermo-optics for spaceborne high-resolution remote sensor

Wang, Tailei; Zhang, Liu; Zhang, Fan; Lu, Yongnan

doi:10.1016/j.applthermaleng.2023.120676

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…Moreover, Wang et al [19] reported a significant reduction in the ATCS for spaceborne high-resolution remote sensors (HRSs), achieving a 78.6% reduction rate in the ATCS's resource occupancy. The authors employed an unsupervised learning framework integrating kernel-based principal component analysis with Gaussian mixture model clustering.…”

Section: Atcssmentioning

confidence: 99%

A Review of Novel Heat Transfer Materials and Fluids for Aerospace Applications

Nobrega,

Cardoso,

Souza

et al. 2024

Aerospace

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The issue of thermal control for space missions has been critical since the early space missions in the late 1950s. The demands in such environments are heightened, characterized by significant temperature variations and the need to manage substantial densities of heat. The current work offers a comprehensive survey of the innovative materials and thermal fluids employed in the aerospace technological area. In this scope, the materials should exhibit enhanced reliability for facing maintenance and raw materials scarcity. The improved thermophysical properties of the nanofluids increase the efficiency of the systems, allowing the mass/volume reduction in satellites, rovers, and spacecraft. Herein are summarized the main findings from a literature review of more than one hundred works on aerospace thermal management. In this sense, relevant issues in aerospace convection cooling were reported and discussed, using heat pipes and heat exchangers, and with heat transfer ability at high velocity, low pressure, and microgravity. Among the main findings, it could be highlighted the fact that these novel materials and fluids provide enhanced thermal conductivity, stability, and insulation, enhancing the heat transfer capability and preventing the malfunctioning, overheating, and degradation over time of the systems. The resulting indicators will contribute to strategic mapping knowledge and further competence. Also, this work will identify the main scientific and technological gaps and possible challenges for integrating the materials and fluids into existing systems and for maturation and large-scale feasibility for aerospace valorization and technology transfer enhancement.

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Section: Atcssmentioning

confidence: 99%

A Review of Novel Heat Transfer Materials and Fluids for Aerospace Applications

Nobrega,

Cardoso,

Souza

et al. 2024

Aerospace

View full text Add to dashboard Cite

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Optimization strategy of active thermal control based on Kriging metamodel and many-objective evolutionary algorithm for spaceborne optical remote sensors

Wang,

Zhang,

Zhang

et al. 2024

Applied Thermal Engineering

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Automatic generation method for long-focal-length unobscured freeform optical systems with small volume

Sun,

Wei,

et al. 2024

Appl. Opt.

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The existing design methods for long-focal-length unobscured freeform systems rarely consider the imaging quality requirements and volume constraints simultaneously, causing most of the final designs to not fulfill the requirement of light weight. This study proposes a method to automatically design a long-focal-length unobscured reflective system that satisfies volume constraints while maintaining high imaging quality. First, a method to adaptively set the structural parameter range is proposed, and multiple parameters for different systemic specifications can be effectively calculated within it. Subsequently, the systemic volume and area functions are constructed using the ray tracing method, where the tilt angles, distances between mirrors, and radii of curvature of the mirrors are chosen as the optimization parameters. Third, a comprehensive objective function is jointly established combining ray obscuration and convergence as performance evaluation factors. Then, the structural parameters of a long-focal-length unobscured system with small volume are easily obtained via the simulated annealing method. Finally, the improved W-W method is used to further enhance the imaging quality of the system, and an unobscured freeform reflective optical system with three mirrors is automatically generated. Experimental results demonstrate that our method can automatically calculate the parameter ranges to facilitate the search for structural parameters, and effectively design the long-focal-length unobscured freeform systems with small volume and high imaging quality.

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Reduction and reconstruction strategy of active thermal control system based on unsupervised learning and thermo-optics for spaceborne high-resolution remote sensor

Cited by 3 publications

References 38 publications

A Review of Novel Heat Transfer Materials and Fluids for Aerospace Applications

A Review of Novel Heat Transfer Materials and Fluids for Aerospace Applications

Optimization strategy of active thermal control based on Kriging metamodel and many-objective evolutionary algorithm for spaceborne optical remote sensors

Automatic generation method for long-focal-length unobscured freeform optical systems with small volume

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