Acta Astronautica最新文献_第9页

A review of selective laser sintering/melting techniques for lunar construction 月球建筑中选择性激光烧结/熔化技术的研究进展

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-26 DOI: 10.1016/j.actaastro.2025.08.047

I.A. Agapkin, E.N. Slyuta

引用次数: 0

Cislunar satellite motion prediction via hybrid parametric and deep learning models 基于混合参数和深度学习模型的地月卫星运动预测

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-26 DOI: 10.1016/j.actaastro.2025.08.036

Emanuela Gaglio , Riccardo Bevilacqua

{"title":"Cislunar satellite motion prediction via hybrid parametric and deep learning models","authors":"Emanuela Gaglio , Riccardo Bevilacqua","doi":"10.1016/j.actaastro.2025.08.036","DOIUrl":"10.1016/j.actaastro.2025.08.036","url":null,"abstract":"<div><div>The cislunar region, increasingly recognized for its strategic role for scientific, commercial, and military purposes, has emerged as the focus of numerous space missions planned over the next decade. The spacecraft motion in this region is governed by the complex interaction of gravitational forces by the Earth, the Moon, and the Sun, as well as perturbations such as solar radiation pressure and gravitational interactions with other celestial bodies. An accurate assessment of the dynamics of stable and unstable orbital regions and the prediction of absolute and relative satellite-to-satellite motion are essential for the success of missions and operational safety. This work introduces a novel hybrid approach that integrates a parametric analysis based on deep learning techniques to isolate regions in which the states of the satellites do not diverge and predict their evolution as a function of time. By defining non-dimensional parametric surfaces and curves in the Earth-Moon rotating reference frame, the method isolates orbital configurations that lead to non-divergent trajectories. The analysis enabled the identification of a region of initial conditions to generate high-fidelity trajectories. This set is then used to train a deep learning model capable of efficiently predicting both absolute and relative satellite-to-satellite states. The proposed approach significantly enhances Space Domain Awareness capabilities, addressing the challenges of managing an increasing number of cislunar missions and mitigating risks such as orbital collisions and instability.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 381-394"},"PeriodicalIF":3.4,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Path planning algorithm for a South Pole lunar rover mission 南极月球车任务路径规划算法

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-26 DOI: 10.1016/j.actaastro.2025.07.059

Feng Yang Chen , Natasha Jackson , Pierre Allard , Giovanni Beltrame

{"title":"Path planning algorithm for a South Pole lunar rover mission","authors":"Feng Yang Chen , Natasha Jackson , Pierre Allard , Giovanni Beltrame","doi":"10.1016/j.actaastro.2025.07.059","DOIUrl":"10.1016/j.actaastro.2025.07.059","url":null,"abstract":"<div><div>On the Moon, a rover needs to navigate around physical obstacles related to the topography such as boulders or steep slopes, to reach targets of scientific interest. In addition, it needs to avoid shadowed areas (which vary during the day), which prevent the rover from having access to the Sun for energy or to the Earth for communication. The combination of changing illumination and communication, as well as the rugged terrain, make the path planning quite complex. Moreover, the distance between the Moon and Earth causes a latency for commands to reach the rover. This makes it difficult to plan the rover’s actions, especially with many areas to explore. To tackle this problem, we propose a novel mission planner tool with two components: we first use a two-step Genetic Algorithm to compute a tentative order of exploration from a list of points of interest, allowing us to associate a time stamp for each explored waypoint. We then compute feasible trajectories between the ordered waypoints while ensuring that the rover is avoiding all static obstacles, staying in contact with Earth, and being powered by solar illumination. The simulation results show that this tool works well for different lunar sites and substantially reduces the workload for manual mission planning.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 349-360"},"PeriodicalIF":3.4,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rendezvous and docking operations in near rectilinear halo orbits 接近直线光晕轨道的交会对接操作

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-26 DOI: 10.1016/j.actaastro.2025.08.027

Wei Liu , Jianjun Luo , Zeyang Yin

{"title":"Rendezvous and docking operations in near rectilinear halo orbits","authors":"Wei Liu , Jianjun Luo , Zeyang Yin","doi":"10.1016/j.actaastro.2025.08.027","DOIUrl":"10.1016/j.actaastro.2025.08.027","url":null,"abstract":"<div><div>Rendezvous and docking (RVD) in non-Keplerian Near Rectilinear Halo Orbit (NRHO) presents unique challenges due to orbit-attitude three-body dynamics. This study subdivides the RVD process into three operationally distinct phases, each with specific technical requirements: the transfer and phasing phase, the loitering phase, and the terminal docking phase. A tailored strategy is developed for each phase, combining natural dynamical mechanisms with forced control methodologies to achieve mission objectives. In the transfer and phasing phase, leveraging Cauchy-Green tensor (CGT) stretching directions for low-energy orbital alignment. During the loitering phase, a CGT-derived drift trajectory is designed, while attitude-stabilizing flows are applied to ensure stable spacecraft orientation. Finally, for the terminal docking phase, prescribed performance control (PPC) enforces precise six-degree-of-freedom (6-DOF) control by enforcing strict transient and steady-state constraints. Numerical simulation demonstrates the effectiveness of this approach for RVD operations between a chaser spacecraft and a target space station in NRHO.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 421-432"},"PeriodicalIF":3.4,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A real-time maneuver detection method for low data rate 一种低数据速率的实时机动检测方法

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-26 DOI: 10.1016/j.actaastro.2025.08.017

Peiyun Wu , Yan Zhang , Jing Li , Jintao Chen

{"title":"A real-time maneuver detection method for low data rate","authors":"Peiyun Wu , Yan Zhang , Jing Li , Jintao Chen","doi":"10.1016/j.actaastro.2025.08.017","DOIUrl":"10.1016/j.actaastro.2025.08.017","url":null,"abstract":"<div><div>The real-time detection of maneuvering space objects is crucial for maintaining Space Situational Awareness (SSA). However, timely detection of a space object’s maneuver while simultaneously avoiding false alarms is challenging under low data rate conditions, as real-time denoising becomes particularly difficult in such cases. To this end, we propose a real-time maneuver detection method based on the maneuver detection parameter for low data rate conditions. Specifically, we first propose a novel Wavelet Transform Combined with Propagation (WTCP) method to process the time series data to better eliminate noise, in which the propagation process is introduced to extend the data boundaries to improve the real-time capability of the Wavelet Transform (WT). To further distinguish maneuver from noise, we then apply the coefficient of variation to construct the comprehensive criterion by fusing the semi-major axis and orbital inclination. After that, the comprehensive criterion is mapped to the <span><math><mfenced><mrow><mn>0</mn><mo>,</mo><mn>1</mn></mrow></mfenced></math></span> interval through a well-designed threshold function to finally obtain the maneuver detection parameter, which can clearly characterize the probability of a maneuver. Furthermore, we introduced a reconfirmation strategy, ensuring that all detection results are reconfirmed and false alarms are corrected promptly in near real-time. The simulation results show that the proposed method can detect the maneuver rapidly while maintaining a low false alarm rate under low data rate conditions. Compared with the Weighted Moving Average Filter (WMAF), the WTCP performs better in extracting the maneuver from noise.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 289-299"},"PeriodicalIF":3.4,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First tests of a laser ice drill for the exploration of interplanetary ice and icy soils 用于探测行星际冰和冰冻土壤的激光冰钻的首次测试

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-26 DOI: 10.1016/j.actaastro.2025.08.049

Martin Koßagk , Leo Peiffer , Lukas Mohr , Martin Tajmar , Tino Schmiel

{"title":"First tests of a laser ice drill for the exploration of interplanetary ice and icy soils","authors":"Martin Koßagk , Leo Peiffer , Lukas Mohr , Martin Tajmar , Tino Schmiel","doi":"10.1016/j.actaastro.2025.08.049","DOIUrl":"10.1016/j.actaastro.2025.08.049","url":null,"abstract":"<div><div>The exploration of icy moons and other icy regions such as permanently shadowed lunar craters, Martian polar caps or comets is of great scientific interest, as they might offer life-friendly environmental conditions or can serve as resource deposits for human exploration. In contrast to conventional melting probes, this work presents a laser ice drill, which drills a 6.15 mm diameter hole in the ice and drives the resulting gases and non-volatile additives from the bottom of the hole to the surface for analysis purposes. To demonstrate the concept, various types of ice with dust fraction up to 96.6 wt% were drilled in a laboratory setup. The tests were carried out at vacuum pressures in the 100 Pa range and ambient temperature. The drilling depth was simultaneously tracked with a laser rangefinder, so that a depth assignment of the ejected substances was possible. During the drilling tests, melting speeds of up to 1.7 m/h at 12.7 W laser power were achieved in pure granular ice and 1 m/h at 19.7 W in clear ice. In dusty ice, however, even higher drilling speeds were achieved without increasing the laser power. The melting rates of all drilling experiments are simulated in good agreement with a thermal model.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 460-475"},"PeriodicalIF":3.4,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective optimization of thrust control strategies for electric pump-fed rocket engines 电动泵供火箭发动机推力控制策略的多目标优化

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-25 DOI: 10.1016/j.actaastro.2025.08.020

Nanjia Yu , Tianwen Li , Haodong He , Yaming Zhao

{"title":"Multi-objective optimization of thrust control strategies for electric pump-fed rocket engines","authors":"Nanjia Yu , Tianwen Li , Haodong He , Yaming Zhao","doi":"10.1016/j.actaastro.2025.08.020","DOIUrl":"10.1016/j.actaastro.2025.08.020","url":null,"abstract":"<div><div>Electric pump-fed rocket engines are critical for reusable launch vehicles due to their ability to flexibly regulate thrust and reduce structural mass. This study presents a novel multi-objective optimization framework to determine optimal thrust control strategies for a liquid oxygen/methane electric pump-fed rocket engine, operating across a thrust range of 20 %–100 %. The framework addresses trade-offs among specific impulse, electric energy consumption, and thermal protection reliability. Using the Non-Dominated Sorting Genetic Algorithm (NSGA-III), we evaluated candidate strategies and identified well-distributed Pareto frontier solutions, refined through a comprehensive evaluation method combining weighting and the Technique for Order of Preference by Similarity to Ideal Solution. The optimal strategy employs monotonic pump speed control for 80 %–100 % rated power level and joint regulation of pump speed and injector opening for 20 %–70 % rated power level, with fully open main valves to minimize energy consumption. Below 60 % rated power level, strategic mixture ratio reductions mitigate heat transfer deterioration in subcritical methane, ensuring thermal reliability, while fuel injector throttling enhances cooling capacity, increasing specific impulse by up to 5 % at 40 %–60 % rated power level. These findings demonstrate the effectiveness of the Non-Dominated Sorting Genetic Algorithm for complex propulsion optimization and provide practical strategies for enhancing engine performance in reusable launch systems, advancing sustainable space exploration.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 243-253"},"PeriodicalIF":3.4,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Establishing a governance for cyber operations in outer space: Exploring challenges faced by space and cyber commands 建立外层空间网络作战治理：探讨空间和网络指挥面临的挑战

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-25 DOI: 10.1016/j.actaastro.2025.08.048

Clémence Poirier

{"title":"Establishing a governance for cyber operations in outer space: Exploring challenges faced by space and cyber commands","authors":"Clémence Poirier","doi":"10.1016/j.actaastro.2025.08.048","DOIUrl":"10.1016/j.actaastro.2025.08.048","url":null,"abstract":"<div><div>During the past decade, major spacefaring nations have updated their space governance, establishing space forces and space commands now designed to address the evolving threat landscape in outer space. In parallel, the threat landscape has also evolved in cyberspace with a skyrocketing number of attacks coming from an increasingly diversified pool of actors, requiring governance changes authorizing the establishment of cyber forces and cyber commands. Both space and cyberspace are now increasingly recognized as warfighting domains and armed forces are conducting, or training to conduct, cyber-enabled space operations, which remain a new set of operations for which governance, operational modes, processes, and doctrines have to be adopted. The paper will aim at providing an overview of the governance of cyber-enabled operations in space and cyber commands and the challenges that these new missions face from the organizational perspective. First, the paper will provide case studies on the United States, the United Kingdom, Germany, and France, looking particularly into the governance, mandates and responsibilities regarding cyber operations. Then, the paper will analyze challenges and shortcomings associated with the establishment of responsibilities for cyber operations in Space and Cyber Commands. Finally, the paper will provide an overview of evolving governance issues and questions that will influence the roles such space cyber operations will assume in dynamically changing battlefield settings.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 236-242"},"PeriodicalIF":3.4,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated optimization of Martian regolith Sintering: Tailoring microstructure and performance in a mineralogically replicated simulant 火星风化层烧结的综合优化：在矿物学复制模拟物中裁剪微观结构和性能

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-23 DOI: 10.1016/j.actaastro.2025.08.038

Yutong Deng, Feng Li, Siqi Zhou, Xinyang Tao, Qi Zhou, Qinxin Feng

{"title":"Integrated optimization of Martian regolith Sintering: Tailoring microstructure and performance in a mineralogically replicated simulant","authors":"Yutong Deng, Feng Li, Siqi Zhou, Xinyang Tao, Qi Zhou, Qinxin Feng","doi":"10.1016/j.actaastro.2025.08.038","DOIUrl":"10.1016/j.actaastro.2025.08.038","url":null,"abstract":"<div><div>Leveraging in-situ resource utilization (ISRU) to enable sustainable construction on Mars critically depends on understanding the inherent heterogeneity in particle size distribution and mineral composition of Martian soil. This study explores the vacuum sintering dynamics for mineralogically replicated BH-Mars-S simulant, unraveling the intricate interplay between granulometric characteristics and thermal processing parameters (1175–1250°C). Through comparative analysis of two distinct particle systems - fine (d<sub>50</sub> ≈ 12.7 μm) versus coarse (d<sub>50</sub> ≈ 127 μm) fractions - a remarkable 102 % enhancement in densification efficiency and 300 % enhancement in compressive strength was demonstrated through particle size optimization. Detailed microstructural investigations reveal that densification predominantly occurs via liquid-phase mechanisms facilitated by selective melting of plagioclase and pyroxene, while olivine and chromite maintain structural stability throughout the process. Particularly noteworthy is the precise control of sintering conditions, which also allows for modulation of thermal conductivity, providing additional design flexibility for Martian infrastructure. The study articulates a refined mineral-specific sintering mechanism, offering a comprehensive framework for optimizing the mechanical and thermal performance of regolith-based building materials for future Mars exploration.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 224-235"},"PeriodicalIF":3.4,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance characteristics of a LaB6 dry cathode coupled with a water-vapor Hall effect thruster LaB6干阴极与水蒸汽霍尔效应推力器耦合的性能特性

IF 3.4 2区物理与天体物理

Acta Astronautica Pub Date : 2025-08-22 DOI: 10.1016/j.actaastro.2025.08.032

Daigo Takasaki , Aoma Fujimori , Hiroyuki Koizumi , Hokuto Sekine , Isami Dainichi , Kimiya Komurasaki

{"title":"Performance characteristics of a LaB6 dry cathode coupled with a water-vapor Hall effect thruster","authors":"Daigo Takasaki , Aoma Fujimori , Hiroyuki Koizumi , Hokuto Sekine , Isami Dainichi , Kimiya Komurasaki","doi":"10.1016/j.actaastro.2025.08.032","DOIUrl":"10.1016/j.actaastro.2025.08.032","url":null,"abstract":"<div><div>In this study, a lanthanum hexaboride (LaB<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span>) dry cathode was tested in both diode mode with a graphite collector plate and coupling mode with a plume of a water-vapor Hall effect thruster (HET), in order to evaluate its compatibility. The work function of polycrystalline LaB<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span>, initially 3.06 eV in diode mode, increased to approximately 3.6 ± 0.2 eV in coupling mode. This shift was consistent with post-operation oxygen deposition on the emitter surface, as revealed by energy-dispersive X-ray spectroscopy. The cathode emitted 200 mA of electron current with 100 V of negative bias voltage in the coupling configuration and it was roughly ten times higher than the space-charge-limited current observed in diode mode. Fitting equations were developed based on experimental data to predict the dry cathode performance under a broader range of operational conditions. Calculations indicated that electron production cost could be less than 150 W/A, surpassing that of a water radio frequency (RF) cathode. The estimated emitter erosion rate was below <span><math><mrow><mn>8</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><mspace></mspace><mi>mm/h</mi></mrow></math></span>, suggesting sufficient lifetime for HET operation. The thruster efficiency of a water-vapor HET employing the LaB<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span> dry cathode was estimated to reach 9.7% at a discharge voltage of 350 V and an anode mass flow rate of 0.68 mg/s, comparable to that of a xenon RF cathode. These results highlight the strong potential of LaB<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span> dry cathodes for use in water-vapor HETs.</div></div>","PeriodicalId":44971,"journal":{"name":"Acta Astronautica","volume":"237 ","pages":"Pages 208-223"},"PeriodicalIF":3.4,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0