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Journal articles on the topic 'Expensive aerospace'

Author: Grafiati

Published: 1 April 2023

Last updated: 31 July 2025

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1

Shi, Renhe, Teng Long, Nianhui Ye, Yufei Wu, Zhao Wei, and Zhenyu Liu. "Metamodel-based multidisciplinary design optimization methods for aerospace system." Astrodynamics 5, no. 3 (2021): 185–215. http://dx.doi.org/10.1007/s42064-021-0109-x.

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AbstractThe design of complex aerospace systems is a multidisciplinary design optimization (MDO) problem involving the interaction of multiple disciplines. However, because of the necessity of evaluating expensive black-box simulations, the enormous computational cost of solving MDO problems in aerospace systems has also become a problem in practice. To resolve this, metamodel-based design optimization techniques have been applied to MDO. With these methods, system models can be rapidly predicted using approximate metamodels to improve the optimization efficiency. This paper presents an overal

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Chizik, Stephanie Marie. "It’s a Bird! It’s a Plane! It’s a Super Squad on an SPF Roof!" CoatingsPro 16, no. 1 (2016): 82–86. https://doi.org/10.5006/cp2016_16_1-82.

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Ong, Yew S., Prasanth B. Nair, and Andrew J. Keane. "Evolutionary Optimization of Computationally Expensive Problems via Surrogate Modeling." AIAA Journal 41, no. 4 (2003): 687–96. http://dx.doi.org/10.2514/2.1999.

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Paul, Ananna, and Mahesh Teleti. "Finite Elemental Analysis of Aerospace Structures." International Journal for Research in Applied Science and Engineering Technology 13, no. 4 (2025): 1927–39. https://doi.org/10.22214/ijraset.2025.68649.

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Abstract: Finite Element Analysis (FEA) has become a vital resource in the aerospace industry, allowing engineers to simulate and scrutinizeintricate structural, thermal, and fluid dynamics issues with remarkable accuracy. This computational method helps predict stress distribution, deformation, vibration modes, and thermal characteristicsin aerospace components like airframes, wings, engines, and landing gear under various operating conditions. By dividing complex structures into smaller, manageable finite elements, FEA offers astute judgments into performance, safety, and durability while mi

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S, Nikkisha, Rohan S, Pragyan Pattanaik Pattanaik, Ankit Kumar Mishra, and Dheva Darshini. "Review Study on Mechanical and Thermal Properties of Ceramic Materials for Future Aerospace Applications." Materials and its Characterization 1, no. 2 (2022): 107–13. http://dx.doi.org/10.46632/mc/1/2/7.

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We are investigating the usage of ceramic materials in the aerospace sector. Ceramics are being used in a restricted number of aeronautical structural applications. Ceramics brittleness, lack of malleability, and expensive cost has been key deterrents to their widespread usage. We can determine the mechanical and thermal properties of this material by studying its mechanical and thermal properties such as strength, hardness, elasticity, grip and fracture, and thermal conductivity, diffusivity, thermal expansion, coefficient of expansion, and diffusivity. Some ceramic materials offer qualities

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Cai, Xiwen, Haobo Qiu, Liang Gao, Li Wei, and Xinyu Shao. "Adaptive Radial-Basis-Function-Based Multifidelity Metamodeling for Expensive Black-Box Problems." AIAA Journal 55, no. 7 (2017): 2424–36. http://dx.doi.org/10.2514/1.j055649.

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He, Youwei, Jinju Sun, Peng Song, and Xuesong Wang. "Dual Kriging assisted efficient global optimization of expensive problems with evaluation failures." Aerospace Science and Technology 105 (October 2020): 106006. http://dx.doi.org/10.1016/j.ast.2020.106006.

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Roux, Maxime, Nicolas Eguémann, Clemens Dransfeld, Frédéric Thiébaud, and Dominique Perreux. "Thermoplastic carbon fibre-reinforced polymer recycling with electrodynamical fragmentation." Journal of Thermoplastic Composite Materials 30, no. 3 (2016): 381–403. http://dx.doi.org/10.1177/0892705715599431.

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The end of life of carbon fibre-reinforced polymer (CFRP) structures represents a major challenge to the aerospace industry, as new European regulations are demanding recycling solutions that can be complicated and expensive to apply. This study aims to address new practical ways to recycle CFRP materials. CFRP materials with a polyether ether ketone (PEEK) matrix were fragmented via electrodynamical fragmentation, which exhibits several benefits compared to mechanical shredding processes, especially for composites commonly found in the aerospace industry. The fragments are characterized and r

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Drikakis, Dimitris, Dochan Kwak, and Cetin C. Kiris. "Computational aerodynamics: Advances and challenges." Aeronautical Journal 120, no. 1223 (2016): 13–36. http://dx.doi.org/10.1017/aer.2015.2.

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ABSTRACTComputational aerodynamics, which complement more expensive empirical approaches, are critical for developing aerospace vehicles. During the past three decades, computational aerodynamics capability has improved remarkably, following advances in computer hardware and algorithm development. However, most of the fundamental computational capability realised in recent applications is derived from earlier advances, where specific gaps in solution procedures have been addressed only incrementally. The present article presents our view of the state of the art in computational aerodynamics an

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Hernandez, Jhonatan Fernando Eulopa, Emmanuel Cervantes Hernández, and Diego Alfredo Padilla Perez. "Augmented Reality for Interaction with a CubeSat nanosatellite (ARICS)." Journal of Physics: Conference Series 2475, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1742-6596/2475/1/012009.

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Abstract The development of national aerospace technology has aroused interest in different sectors, so there is a long road to transformation where our country must develop the necessary aerospace infrastructure for said technology. The educational sector has been interested in aerospace technology but the use of this type of technology is expensive. That is why, with the support of ICTs, we think about how to solve this problem and this is where augmented reality (AR) comes in, given that today most young people have a cell phone capable of displaying functions of AR through a mobile applica

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11

Jiang, Ping, Ji Cheng, Qi Zhou, Leshi Shu, and Jiexiang Hu. "Variable-Fidelity Lower Confidence Bounding Approach for Engineering Optimization Problems with Expensive Simulations." AIAA Journal 57, no. 12 (2019): 5416–30. http://dx.doi.org/10.2514/1.j058283.

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12

Long, Teng, Zhao Wei, Renhe Shi, and Yufei Wu. "Parallel Adaptive Kriging Method with Constraint Aggregation for Expensive Black-Box Optimization Problems." AIAA Journal 59, no. 9 (2021): 3465–79. http://dx.doi.org/10.2514/1.j059915.

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Long, Teng, Xin Li, Renhe Shi, Jian Liu, Xiaosong Guo, and Li Liu. "Gradient-Free Trust-Region-Based Adaptive Response Surface Method for Expensive Aircraft Optimization." AIAA Journal 56, no. 2 (2018): 862–73. http://dx.doi.org/10.2514/1.j054779.

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14

Parkinson, R. C. "Why Space is Expensive—Operational/Economic Aspects of Space Transport." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 205, no. 1 (1991): 45–52. http://dx.doi.org/10.1243/pime_proc_1991_205_236_02.

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15

Booth, Philip, and Geoffrey E. Wood. "Interest rates are low but are annuities expensive?" Economic Affairs 20, no. 3 (2000): 43–44. http://dx.doi.org/10.1111/1468-0270.00238.

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Šajbanová, Kristína, Jozef Čerňan, and Michal Janovec. "Possibilities of using 3D printing technology in production of aircraft components." AEROjournal 18, no. 2 (2021): 10–15. http://dx.doi.org/10.26552/aer.c.2021.2.2.

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The article provides the reader with a brief overview of the technology of industrial 3D printing used in the manufacturing process of aerospace technology. It includes analyses of the position of 3D printing in the aerospace industry and the forecast of its future development based on the marketing analysis of strengths / weaknesses, opportunities and threats. Many airlines and AMOs (Approved Maintenance Organizations) rely on externally supplied spare parts delivered over long distances. The whole process is expensive and time consuming and means a lost profit for the company. The performed

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Kopecki, Grzegorz. "Flight tests and flight data analysis - teaching aerospace engineering students." Global Journal of Information Technology: Emerging Technologies 6, no. 2 (2016): 136. http://dx.doi.org/10.18844/gjit.v6i2.939.

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The ability to carry out in-flight tests and to analyse the flight data registered is, in the case of aerospace engineering students, a vital aspect of education. Since aircraft flight tests are very expensive, frequently the funds allocated to them in the process of education are insufficient. The aim of this article is to present a relatively low-cost method of training students to carry out flight tests and to analyse flight data. The method relies on three consecutive steps. At first, simulation tests relying on the mathematical model of an aircraft are carried out. During these simulation

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Keane, A. J., and J. P. Scanlan. "Design search and optimization in aerospace engineering." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365, no. 1859 (2007): 2501–29. http://dx.doi.org/10.1098/rsta.2007.2019.

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In this paper, we take a design-led perspective on the use of computational tools in the aerospace sector. We briefly review the current state-of-the-art in design search and optimization (DSO) as applied to problems from aerospace engineering, focusing on those problems that make heavy use of computational fluid dynamics (CFD). This ranges over issues of representation, optimization problem formulation and computational modelling. We then follow this with a multi-objective, multi-disciplinary example of DSO applied to civil aircraft wing design, an area where this kind of approach is becoming

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Contreras, José M., Belen Levenfeld, and José M. Torralba. "Coarse and cheap may beat fine and expensive." Metal Powder Report 61, no. 6 (2006): 36–41. http://dx.doi.org/10.1016/s0026-0657(06)70657-9.

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20

Khosravani, Mohammad Reza. "Composite Materials Manufacturing Processes." Applied Mechanics and Materials 110-116 (October 2011): 1361–67. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.1361.

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— Using Composite materials are growing more and more today and we have to use them in possible situation. One of the Composite materials applications is on the Airplane and aero space. Reduction of Airplane weight and more adaptability with nature are examples of benefit of using composite materials in aerospace industries. In this article process of manufacturing of composite materials and specially carbon fiber composite are explained. Advance composite materials are common today and are characterized by the use of expensive, high-performance resin systems and high-strength, high-stiffness

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Hlinka, Jiri, Rostislav Kostial, and Michaela Horpatzka. "Application of enhanced methods for safety assessment of FADEC." Eksploatacja i Niezawodnosc - Maintenance and Reliability 23, no. 1 (2021): 63–73. http://dx.doi.org/10.17531/ein.2021.1.7.

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The paper deals with safety and reliability assessment as an integral part of the development process for modern aviation products with potentially critical functions. Focus is on digital engine control units, their development process and tools offering potential savings in otherwise time demanding and expensive safety assessment processes. The paper shows application of several approaches, which together form an innovative way for safety assessment of aerospace products (otherwise strictly limited by regulation procedures). It is focused on practical ways towards reduction of development cos

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Xiao, Jun Min, and Chang Ming Zhao. "Key Technology of 5-Axis NC Programming and High-Speed Milling for Integral Impellers Based on the General Software UG." Advanced Materials Research 314-316 (August 2011): 1633–37. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1633.

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Integral impellers are very important parts in the fields of aerospace, shipping and locomotive, whose manufacturing accuracy directly affects performance of key equipments. In developed countries special NC programming software is widely used in order to manufacture integral impellers, the vast majority of enterprises have not special NC programming software of integral impellers owing to expensive cost in China. Key technology of 5-axis NC Programming for integral impellers was solved by using the general software UG and precision machining of integral impellers had been implemented in 5-axi

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23

Choi, Jun Yong, Do Won Seo, and Jae Kyoo Lim. "Effects of Water Absorption Cycles on Fracture Toughness in Laminated CFRP Composites." Key Engineering Materials 297-300 (November 2005): 2727–32. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2727.

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Composite materials have drawn a lot of attention in recent years due to their being in expensive, lightweight and biodegradable. The polyetherimide has been successfully used as an effective toughening modifier for polyfuctional epoxy resins for aerospace use. The material used in this study was solvent-impregnated carbon-fiber fabric reinforced polyetherimide. In this study, effects of water absorption cycles on fracture toughness in carbon fiber reinforced composites (CFRP) have been investigated according to various absorption cycles. As a result, strength of CFRP composite was decreased a

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24

Alpert, Sofiia. "Satellite monitoring problems in the aerospace complex." Ukrainian journal of remote sensing, no. 27 (December 10, 2020): 26–30. http://dx.doi.org/10.36023/ujrs.2020.27.184.

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Задачі підсуNowadays with the rapid development of information technologies, UAV-based Remote Sensing (drone remote sensing) gives a new opportunities for conducting scientific research in a much more detail way. UAVs (unmanned aerial vehicles) give the opportunity to acquire data at sufficiently low cost. They also provide remote data more rapidly than piloted aerial vehicles. Nowadays drones are often used, because application of piloted aerial vehicles can be dangerous, difficult and expensive for some territories. Application of low altitude UAVs give a possibility to achieve images with a

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He, Youwei, Jinju Sun, Peng Song, and Xuesong Wang. "Variable-fidelity expected improvement based efficient global optimization of expensive problems in presence of simulation failures and its parallelization." Aerospace Science and Technology 111 (April 2021): 106572. http://dx.doi.org/10.1016/j.ast.2021.106572.

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26

Santiago, Carolyn Carradero, Bharat Yelamanchi, Jose Angel Diosdado De la Peña, et al. "Thermoplastic Extrusion Additive Manufacturing of High-Performance Carbon Fiber PEEK Lattices." Crystals 11, no. 12 (2021): 1453. http://dx.doi.org/10.3390/cryst11121453.

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Polyetheretherketone (PEEK) has been the focus of substantial additive manufacturing research for two principal reasons: (a) the mechanical performance approaches that of aluminum at relatively high temperatures for thermoplastics and (b) the potential for qualification in both the aerospace and biomedical industries. Although PEEK provides outstanding strength and thermal stability, printing can be difficult due to the high melting point. Recently, high-temperature soluble support has enabled the printing of lattices and stochastic foams with overhanging features in these high-performance car

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Martinsson, Julian, Massimo Panarotto, Michael Kokkolaras, and Ola Isaksson. "EXPLORING THE POTENTIAL OF DIGITAL TWIN-DRIVEN DESIGN OF AERO-ENGINE STRUCTURES." Proceedings of the Design Society 1 (July 27, 2021): 1521–28. http://dx.doi.org/10.1017/pds.2021.413.

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AbstractAs the diversity of customer needs increases within the aerospace industry, so does the need for improved design practices to reduce quality issues downstream. When designing new products, design engineers struggle with applying tolerances to features, which often leads to expensive late design iterations. To mitigate this, one aerospace company is looking to reuse tolerance deviation data yielded during manufacturing in design. In the long term these data could provide the basis for a Digital Twin that can be used for improved product development. This article explores how data from p

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Krstić, Jovana, Jelena Jovanović, Sandra Gajević, et al. "Application of metal matrix nanocomposites in engineering." Advanced Engineering Letters 3, no. 4 (2024): 180–90. https://doi.org/10.46793/adeletters.2024.3.4.5.

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Nanocomposites nowadays, have the tendency to replace conventional composite materials in many commercial products. These composites find application in a diverse range of fields, including computer components, data storage systems, various membranes and filters, as well as advanced materials in the automotive and aerospace industries. They are available in different forms and from various manufacturers, providing a wide selection. Although they may be more expensive, compared to conventional materials, the ability to customize the properties of nanocomposites to the specific needs of end-user

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Carlier, Claude. "Les armées françaises et l'observation à partir de la troisième dimension. Du ballon au satellite." Revue Historique des Armées 234, no. 1 (2004): 51–60. http://dx.doi.org/10.3406/rharm.2004.5567.

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Gathering intelligence on an adversary has always been a vital element of success. Man’s conquest of aerospace (the Third Dimension), beginning in 1783, opened up fresh perspectives. Reconnaissance was one of the first missions given to lighter-than-air vessels, balloons and dirigibles and then, from 1909, to aeroplanes. A half-century later the Third Dimension experienced an almost-limitless expansion with the conquest of space. Almost another fifty years on, new means to utilise the Third Dimension started to come into service with UAVs (known sometimes as drones). New aerospace military rec

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Weston, Nicholas S., and Martin Jackson. "FAST-forge of Titanium Alloy Swarf: A Solid-State Closed-Loop Recycling Approach for Aerospace Machining Waste." Metals 10, no. 2 (2020): 296. http://dx.doi.org/10.3390/met10020296.

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Titanium alloys have excellent properties, but components are very expensive due to the high levels of processing required, such as vacuum melting, multi-stage forging, and machining. As a result, forged titanium alloy components are largely exclusive to the aerospace industry, where a high strength-to-weight ratio, corrosion resistance, and excellent fatigue resistance are essential. However, a typical buy-to-fly ratio for such components is approximately 9:1, as much of the forged billet is machined to swarf. The quantity of waste titanium alloy swarf generated is increasing as aircraft orde

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Prasad-Rao, Jubilee, Olivia J. Pinon Fischer, Neil C. Rowe, et al. "Attrition Risk and Aircraft Suitability Prediction in U.S. Navy Pilot Training Using Machine Learning." Aerospace 10, no. 4 (2023): 379. http://dx.doi.org/10.3390/aerospace10040379.

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The cost to train a basic qualified U.S. Navy fighter aircraft pilot is nearly USD 10 M. The training includes primary, intermediate, and advanced stages, with the advanced stage involving extensive flight training, and, thus, is very expensive as a result. Despite the screening tests in place and early-stage attrition, 4.5% of aviators undergo attrition in this most expensive stage. Key reasons for aviator attrition include poor flight performance, voluntary withdrawals, and medical reasons. The reduction in late-stage attrition offers several financial and operational benefits to the U.S. Na

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Desmarest, S. Godard, C. Johnston, and P. S. Grant. "Determination of the Creep Properties of Pb-free Solders for Harsh Environments Using Meso-scale Testing." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, HITEC (2012): 000117–27. http://dx.doi.org/10.4071/hitec-2012-tp23.

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Solder joints in electronic packages are prone to failure due to the evolution of thermal expansion mismatch strains during thermal cycling. The comparatively wide operating temperature range and long lifetimes of aerospace electronics require high reliability solder joints. Since 2006, high reliability industries (aerospace and military amongst others) that are exempt from lead-free RoHS regulation on account of concerns over the reliability of Pb-free solders have found it increasingly difficult and expensive to continue using traditional Sn-Pb-based solders. Hence there is a pressing need t

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Fei, Chengwei, Jiongran Wen, Lei Han, Bo Huang, and Cheng Yan. "Optimizable Image Segmentation Method with Superpixels and Feature Migration for Aerospace Structures." Aerospace 9, no. 8 (2022): 465. http://dx.doi.org/10.3390/aerospace9080465.

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The lack of high-quality, highly specialized labeled images, and the expensive annotation cost are always critical issues in the image segmentation field. However, most of the present methods, such as deep learning, generally require plenty of train cost and high-quality datasets. Therefore, an optimizable image segmentation method (OISM) based on the simple linear iterative cluster (SLIC), feature migration model, and random forest (RF) classifier, is proposed for solving the small sample image segmentation problem. In the approach, the SLIC is used for extracting the image boundary by cluste

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Dasari, Siva Krishna, Abbas Cheddad, and Petter Andersson. "Predictive modelling to support sensitivity analysis for robust design in aerospace engineering." Structural and Multidisciplinary Optimization 61, no. 5 (2020): 2177–92. http://dx.doi.org/10.1007/s00158-019-02467-5.

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AbstractThe design of aircraft engines involves computationally expensive engineering simulations. One way to solve this problem is the use of response surface models to approximate the high-fidelity time-consuming simulations while reducing computational time. For a robust design, sensitivity analysis based on these models allows for the efficient study of uncertain variables’ effect on system performance. The aim of this study is to support sensitivity analysis for a robust design in aerospace engineering. For this, an approach is presented in which random forests (RF) and multivariate adapt

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Lemanski, S. L., P. M. Weaver, and G. F. J. Hill. "Design of composite helicopter rotor blades to meet given cross-sectional properties." Aeronautical Journal 109, no. 1100 (2005): 471–75. http://dx.doi.org/10.1017/s0001924000000889.

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Abstract This paper examines the design of a composite helicopter rotor blade to meet given cross-sectional properties. As with many real-world problems, the choice of objective and design variables can lead to a problem with a non-linear and/or non-convex objective function, which would require the use of stochastic optimisation methods to find an optimum. Since the objective function is evaluated from the results of a finite element analysis of the cross section, the computational expense of using stochastic methods would be prohibitive. It is shown that by choosing appropriate simplified de

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Tsushima, Natsuki, Kenichi Saitoh, Hitoshi Arizono, and Kazuyuki Nakakita. "Structural and Aeroelastic Studies of Wing Model with Metal Additive Manufacturing for Transonic Wind Tunnel Test by NACA 0008 Example." Aerospace 8, no. 8 (2021): 200. http://dx.doi.org/10.3390/aerospace8080200.

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Additive manufacturing (AM) technology has a potential to improve manufacturing costs and may help to achieve high-performance aerospace structures. One of the application candidates would be a wind tunnel wing model. A wing tunnel model requires sophisticated designs and precise fabrications for accurate experiments, which frequently increase manufacturing costs. A flutter wind tunnel testing, especially, requires a significant cost due to strict requirements in terms of structural and aeroelastic characteristics avoiding structural failures and producing a flutter within the wind tunnel test

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Zhu, Yubo, Jili Rong, Qianqiang Song, and Zhipei Wu. "Research on Reliability Evaluation Method of Aerospace Pyrotechnic Devices Based on Energy Measurement." Applied Sciences 10, no. 22 (2020): 8200. http://dx.doi.org/10.3390/app10228200.

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High reliability is the basic requirement of aerospace pyrotechnic devices. Traditional reliability evaluation methods require a lot of tests, which become too expensive; therefore, the small-sample evaluation method is needed to reduce the cost. Using energy as a performance parameter can better reflect the essence of the function of the pyrotechnic device compared to using force. Firstly, this article assumes that the strength obeys the normal distribution, and the stress is a constant; therefore, the reliability evaluation formula based on the t distribution is proposed. Then, taking the pi

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Lofty, E. A., I. M. Kamal, M. A. Hassan, and K. M. Hassan. "Flexural investigation of a composite trussed-beam for aerospace shelters using numerical modelling." Journal of Physics: Conference Series 2616, no. 1 (2023): 012048. http://dx.doi.org/10.1088/1742-6596/2616/1/012048.

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Abstract The composite beams used in aerospace shelters are always exposed to many problems such as: expensive repairing and maintenance costs, and low durability. This research aims to investigate the effect of reinforcing hybrid composite beams with embedded steel-angle truss system (Trussed-beam) inside concrete cover to be used in aerospace structures and shelters. Foremost, a reliable finite element (FE) model was conducted to verify a previous experimental result of a trussed beam, using ABAQUS software. Then, a parametric study was conducted to optimize several parameters, using the rel

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Colaw, Christopher Lee, Garrett Madison, Bill Tseng, et al. "Methodology for Enablement of Human Digital Twins for Quality Assurance in the Aerospace Manufacturing Domain." Sensors 25, no. 11 (2025): 3362. https://doi.org/10.3390/s25113362.

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This paper will examine a methodology to enable the usage of Human Digital Twins (HDTs) for Quality Assurance in the aerospace manufacturing domain. Common-place hardware and infrastructure, including cloud-based facility security cameras, cloud-based commercial virtual environments, a virtual reality (VR) headset, and artificial intelligence (AI) detection algorithms, have been connected via application programming interfaces (API) to enable a 24-h surveillance and feedback capability for a representative aerospace manufacturing cell. Human operators who perform defined manufacturing assembly

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40

Gruszecki, Jan. "ELECTRO‐MECHANICAL ACTUATORS FOR GENERAL AVIATION FLY‐BY‐WIRE AIRCRAFT." Aviation 9, no. 1 (2005): 19–25. http://dx.doi.org/10.3846/16487788.2005.9635892.

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A long‐term goal for general aviation aircraft is to reduce or eliminate the use of fluid power systems such as hydraulics from the aircraft. Power‐By‐Wire (PBW) technology seems to be the next major step in the development of aircraft control. In this solution, control power comes directly from the aircraft electrical system to the Electro‐Mechanical Actuator (EMA), which includes the electric motor, controller and gearbox. EMAs have the potential to be more efficient, less complicated, less expensive, and more faults tolerant than actuators based on hydraulic systems.

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Molent, L., and R. Singh. "Using the lead crack framework to reduce durability test duration." Aeronautical Journal 124, no. 1276 (2019): 814–20. http://dx.doi.org/10.1017/aer.2019.73.

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ABSTRACTAircraft full-scale fatigue tests are expensive and time-consuming to conduct but are a critical item on the certification path of any aircraft design or modification. This paper outlines a proposal that trades cycling hours for increased detail in the teardown of a metallic test article. A method for determining the equivalent demonstrated crack size (and crack growth curve) at the mandated test life utilising the lead crack framework is demonstrated. It is considered that the test duration can be significantly reduced, whilst still achieving all the desired outcomes of a certificatio

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Srivastava, Ankur, and Andrew J. Meade. "Use of Active Learning to Design Wind Tunnel Runs for Unsteady Cavity Pressure Measurements." International Journal of Aerospace Engineering 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/218710.

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Wind tunnel tests to measure unsteady cavity flow pressure measurements can be expensive, lengthy, and tedious. In this work, the feasibility of an active machine learning technique to design wind tunnel runs using proxy data is tested. The proposed active learning scheme used scattered data approximation in conjunction with uncertainty sampling (US). We applied the proposed intelligent sampling strategy in characterizing cavity flow classes at subsonic and transonic speeds and demonstrated that the scheme has better classification accuracies, using fewer training points, than a passive Latin

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Yang, M., Z. D. Chang, and J. Chen. "Investigation of flexible free incremental sheet forming (FFISF) process to form Ti6Al4V free-form surface panel at room temperature." IOP Conference Series: Materials Science and Engineering 1270, no. 1 (2022): 012086. http://dx.doi.org/10.1088/1757-899x/1270/1/012086.

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Titanium alloy sheet metal shows promising applicability in the aerospace industry with excellent mechanical properties, while its limited room-temperature formability is essential to be improved by thermal-assisted methods, with expensive equipment and much energy consumption. In this work, the flexible free incremental sheet forming process is adopted to manufacture Ti6Al4V free-form surface panel at room temperature. The strain evolution and thickness distribution during this new process are also analysed through finite element methods to reveal the deformation mechanism. Experimental and s

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Firsin, A. O., R. A. Vdovin, E. S. Goncharov, and I. D. Markanov. "Design and manufacture of parts and assemblies of aerospace structures made of composite materials in conditions of additive manufacturing." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 8, no. 1 (2024): 86–94. http://dx.doi.org/10.25206/2588-0373-2024-8-1-86-94.

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This article raises the topic of modernization of existing technological processes of procurement production in terms of eliminating the expensive and lengthy stage of designing and manufacturing metal molds and the introduction of 3D printing technologies. The article provides information about 3D printing technology based on the extrusion method. Information is provided on the main stages of designing the tooling for the «Insert» part, taking into account the features and limitations associated with printing on 3D printers. As part of the study, the roughness and shrinkage of test samples ar

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Shubov, Mikhail. "Electric Rocket Launcher Aircraft—Drone-Launched Short Range Rocket System." Aerospace 10, no. 6 (2023): 514. http://dx.doi.org/10.3390/aerospace10060514.

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This paper is concerned with the idea of a significant improvement of state-of-the-art short-range rockets by means of using rocket artillery systems. Such a system consists of a rocket launcher aircraft (RLA) and a drone-launched short range rocket (DLSRR). An RLA is a reusable first stage of a military rocket. A DLSRR is the expendable second stage, which flies to the target. RLA-DLSRR systems have not yet been built, but they have been described in previous works by the author. State-of-the-art rocket systems are completely expendable and, hence, extremely expensive. No rocket artillery sys

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Knight, Andrew. "Designing and Testing a Lighter, Simpler, Less-Expensive Liquid-Propellant Pump." Journal of Propulsion and Power 20, no. 1 (2004): 141–54. http://dx.doi.org/10.2514/1.9241.

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Araujo, Eliane Silveira Romagnolli, Jamilson Oliveira Costa, Raphael Oliveira Pires de Lima, and Vinicius André Rodrigues Henriques. "Production of Ti-10V-2Fe-3Al for Aerospace Application from Ti-Al Pre-Alloyed Powder." Materials Science Forum 802 (December 2014): 323–28. http://dx.doi.org/10.4028/www.scientific.net/msf.802.323.

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Titanium is found in its raw form in nature mainly in rutile, ilmenite, and anatase which appears in abundant quantities in the earth crust. However, its extraction through the conventional process is still very expensive. Powder metallurgy has been used as an alternative technique for production of titanium alloys parts due to its low cost compared with conventional melting techniques. The process involves the use of powders under high pressure and temperature. Using this technique, Ti-10V-2Fe-3Al samples were produced from Ti-Al pre-alloyed powder with additions of different contents of alum

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Alabsi, Mohammed, and Travis Fields. "Flight controller learning based on real-time model estimation of a quadrotor aircraft." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 9 (2018): 3298–312. http://dx.doi.org/10.1177/0954410018795524.

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Aircraft prototyping and modeling is usually associated with resource expensive techniques and significant post-flight analysis. The NASA Learn-To-Fly concept targets the replacement of the conventional ground-based aircraft development and prototyping approaches with an efficient real-time paradigm. The work presented herein describes a learning paradigm of a quadcopter unmanned aircraft that utilizes real-time flight data. Closed-loop parameter estimation of a highly collinear model terms such as those found on a quadrotor is challenging. Using phase optimized orthogonal multisine input mane

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Langley, R. S., and N. S. Bardell. "A review of current analysis capabilities applicable to the high frequency vibration prediction of aerospace structures." Aeronautical Journal 102, no. 1015 (1998): 287–97. http://dx.doi.org/10.1017/s0001924000065325.

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AbstractMany situations arise in which aerospace structures are subjected to high frequency excitation, in the sense that the wavelength of the induced dynamic response is much shorter than the overall dimensions of the structure. The application of the conventional finite element method to this type of problem faces two difficulties: (i) the short wavelength of the structural deformation requires the use of many elements, which renders the method computationally expensive or even impracticable, and (ii) the response of the structure at high frequencies can be very sensitive to structural deta

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Laučys, Andrius, Saulius Rudys, Martynas Kinka, et al. "INVESTIGATION OF DETECTION POSSIBILITY OF UAVS USING LOW COST MARINE RADAR." Aviation 23, no. 2 (2019): 48–53. http://dx.doi.org/10.3846/aviation.2019.10320.

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The technologies of Unmanned Aerial Vehicles (UAVs) are fast emerging, but as any other technology, development of UAVs provides not only benefits but also the threats. UAV technologies are developing much faster than means of their control and detection. RADAR technology is one of the means of UAV’s detection. Usually, radars are expensive, and usage of high-power radiation is problematic in many cases. Today’s market provides low cost marine radar working on various principles of operation. Such radar are not optimal, but could be used for UAV detection. Detection possibility of UAVs by FMCW

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