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All Topic Review Biography
Topic Review
3D Printed Nonlinear Musculoskeletal Actuator
A nature-inspired musculoskeletal-actuator system is developed using 3d printing for robotic applications. The actuator resembles the rigid segments and the soft-rigid interaction architecture found in limbless vertebrates such as snakes. The rigid segments provide an increase in the range of motion while maintaining structural durability and stability. The soft-rigid interactions provided a remarkable increase in energy transmission and storage, which enhanced the reliability of the musculoskeletal-actuator. Additionally, passive structural stiffness and damping control are achieved. Similar to a muscular system, our musculoskeletal-actuator is capable of increasing its stiffness and damping up to 100% and 60%, respectively, upon load lifting.
  • 602
  • 28 Mar 2022
Topic Review
3D Textiles Based on Warp Knitted Fabrics
Fibre-reinforced composites (FRCs) are already well established in several industrial sectors such as aerospace, automotive, plant engineering, shipbuilding and construction. The technical advantages of FRCs over metallic materials are well researched and proven. The key factors for an even wider industrial application of FRCs are the maximisation of resource and cost efficiency in the production and processing of the textile reinforcement materials. Due to its technology, warp knitting is the most productive and therefore cost-effective textile manufacturing process. In order to produce resource-efficient textile structures with these technologies, a high degree of prefabrication is required. This reduces costs by reducing the number of ply stacks, and by reducing the number of extra operations through final path and geometric yarn orientation of the preforms. 
  • 291
  • 26 May 2023
Topic Review
AAUSAT3
AAUSAT3 is the third CubeSat built and operated by students from the Aalborg University in Denmark . It was launched on 25 February 2013 from the Satish Dhawan Space Centre in India on a PSLV rocket (number C20). AAUSAT3 carries two AIS receivers as the main payload.
  • 276
  • 17 Oct 2022
Topic Review
Acoustic Metamaterials in Aeronautics
Metamaterials, man-made composites that are scaled smaller than the wavelength, have demonstrated a huge potential for application in acoustics, allowing the production of sub-wavelength acoustic absorbers, acoustic invisibility, perfect acoustic mirrors and acoustic lenses for hyper focusing, and acoustic illusions and enabling new degrees of freedom in the control of the acoustic field. The zero, or even negative, refractive sound index of metamaterials offers possibilities for the control of acoustic patterns and sound at sub-wavelength scales. The potential of metamaterial-based technologies has recently caught the interest of the aeronautics community. Their effect in the presence of realistic flows in the surrounding domains, with boundary layer, turbulence, is currently a hot research topic. The interaction with flow requires a careful design of the metamaterial to avoid detrimental effects and enabling the device maximum capabilities in aeronautics.
  • 968
  • 25 Jun 2021
Topic Review
Active Noise Control Technology
Reducing noise radiation via passive control may have adverse effects on the aerodynamic performance. Therefore, an alternative approach is to design the vehicle with some passive control built-in the design, which should be optimized for regular flight operations then engage active noise control (ANC) only in particular situations when the noise temporarily increases above the allowable level as in the vicinity of vertiport.
  • 332
  • 02 Mar 2023
Topic Review
Additive Manufacturing Applications at the Microscale
Additive manufacturing (AM) technology has been researched and developed for almost three decades. Microscale AM is one of the fastest-growing fields of research within the AM area. Considerable progress has been made in the development and commercialization of new and innovative microscale AM processes, as well as several practical applications in a variety of fields. However, there are still significant challenges that exist in terms of design, available materials, processes, and the ability to fabricate true three-dimensional structures and systems at a microscale. For instance, microscale AM fabrication technologies are associated with certain limitations and constraints due to the scale aspect, which may require the establishment and use of specialized design methodologies in order to overcome them.
  • 476
  • 30 May 2022
Topic Review
Additive Manufacturing Technology for Metal Mirrors
With the rapid growth of space optics and aerospace technology, the applications of reflective optical systems are increasing year by year. A case in point is that off-axis three-mirror-anastigmat (TMA) systems have been widely used due to their unique advantages of large aperture and no central occlusion. Meanwhile, the growing requirements for optical systems’ performance, such as resolution and imaging quality, drive the development of focal length and aperture to larger sizes. In turn, the weight, surface accuracy, manufacturing time, and mirror cost are progressively demanding. In recent years, the lightweight space camera used for remote sensing with high resolution has become a global research hotspot in advanced optics.
  • 630
  • 24 Nov 2021
Topic Review
Advancements of Rim-Driven Fans in Aerial Vehicles
As the aviation industry seeks sustainable propulsion solutions, innovative technologies have emerged, among which rim-driven fan (RDF) systems hold notable promise. Amid escalating concerns about greenhouse gas emissions, the aviation sector’s shift towards electric propulsion has gained impetus. RDF technology has emerged as a beacon of optimism, heralding the prospect of energy-efficient and eco-conscious air travel. 
  • 151
  • 22 Dec 2023
Topic Review
Aeroengines’ Bolt Preload Formation Mechanism and Control Technology
The bolt connection structure is widely used in the connection of aeroengine parts, and its connection quality is very important, as it can directly affect the geometric and dynamic performance of the aeroengine. This entry conducts a detailed summary of the aeroengine bolt connection research, in terms of both the tightening mechanism and control technology of bolt connection. It offers a comprehensive review including the tightening mechanism of the single bolt and group bolts, bolt tightening process, and bolt tightening equipment. Besides, the relationship between the tightening mechanism and control technology is summarized. Finally, the future research direction of aeroengine bolt connection through the digital twin is proposed.
  • 402
  • 20 Jul 2023
Topic Review
AI-Based Surface Roughness Prediction for Additively Manufactured Components
Additive manufacturing has gained significant popularity from a manufacturing perspective due to its potential for improving production efficiency. However, ensuring consistent product quality within predetermined equipment, cost, and time constraints remains a persistent challenge. Surface roughness, a crucial quality parameter, presents difficulties in meeting the required standards, posing significant challenges in industries such as automotive, aerospace, medical devices, energy, optics, and electronics manufacturing, where surface quality directly impacts performance and functionality. Artificial intelligence (AI) is one of the methods used by researchers to predict the surface quality of additively fabricated parts. 
  • 285
  • 23 Oct 2023
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