Hypervelocity Impact Society的动态

Origami is the Japanese art of paper folding. It's more than just making fun figures. The underlying principles have found applications in engineering, especially in spacecraft design. A famous example is the James Webb Space Telescope. Its massive mirror and sunshield were meticulously folded to fit inside the rocket and then deployed precisely in space. Applications of origami in Spacecraft Design: * Compact Launch, Large Deployment: Spacecraft components fold for launch and deploy in space, maximizing usable area. * Deployable Solar Panels and Antennas: Origami techniques allow solar panels and antennas to unfold to their full size in space. * Efficient Packaging and Storage: Delicate equipment folds compactly for launch, reducing storage space and launch costs. * Radiation Shielding: Specific folding patterns create lightweight and space-saving radiation shields for spacecraft. * Artificial Muscles and Actuators: Origami inspires the development of lightweight, flexible, and durable robotic systems for space exploration. #Origami #GeometricDesign #GoldenRatio #Mandala #Spacecraft

?? ????-???????? ???????????????????? ???????? ?????????????????? ?????????????? ???? ??????????????: ???????????????? ?????????? ???????????????????????? ???????? ?? ?????????? ?????????????????? ? ?? Inspired by the outstanding work of Nacer Chahat and the NASA Jet Propulsion Laboratory team on the RainCube mission, this animation shows simulated currents on a 6U CubeSat equipped with a deployable mesh reflector antenna operating in Ka band (33 GHz). With a 50 cm main reflector (equal to 55 wavelengths), this configuration includes the CubeSat platform, antenna, and solar panels – making it a complex, electrically large antenna scattering problem. ?? The simulation was carried out using the ESTEAM product in TICRA Tools, requiring just 4.6 GB of RAM (using the full-wave MoM/MLFMM solver). It completed on my standard laptop in about the same time as an online customer call - demonstrating the power of ESTEAM on everyday hardware. ? ?? More details on the case shown here: https://lnkd.in/d3ywcM9r ?? More on NASA JPL’s work on the RainCube antenna: https://lnkd.in/dd9i722H ? #EarthObservation #CubeSat #Antenna #Innovation #Simulation #TICRATools #TICRA

Reaching for the Stars with Polyurethane?? You might be surprised to learn that polyurethane isn't just for furniture and insulation! This versatile polymer plays a crucial role in enabling groundbreaking advancements in astronomy. *Lightweight and Durable: Polyurethane's low density and exceptional strength-to-weight ratio make it ideal for constructing lightweight and robust components for spacecraft. *Thermal Insulation:In the harsh environments of space, polyurethane provides excellent thermal insulation, protecting delicate instruments from extreme temperature fluctuations. *Vibration Damping: Polyurethane foams and elastomers effectively absorb vibrations, ensuring the stability and precision of astronomical instruments. *Radiation Shielding: Certain types of polyurethane offer some level of protection against harmful radiation, safeguarding sensitive electronics. From rocket components and spacecraft structures to telescope mounts and instrument housings, polyurethane continues to push the boundaries of space exploration. our web: https://lnkd.in/e47uGiBi #polyurethane #spaceexploration #pu #rasampolymernami #nami #astronomy #innovation #engineering #sky #astornomer #export #foam #polymer #iran

New journal paper! The urgent and interesting problem of rapid approximation of the #reachable sets of #lowthrust #spacecraft in complex dynamic regimes, including #cislunar space, has to be addressed. In #astrodynamics, rapid approximation of reachable sets is invaluable for #trajectory planning, #collision avoidance, and ensuring safe and #optimal performance within complex dynamics. Our proposed method combines a #minimumtime multi-stage indirect formulation with the celebrated primer vector theory of Lawden. Reachable sets are generated under two-body dynamics and circular restricted three-body problem dynamics. The results indicate that low-thrust spacecraft reachable sets coincide with #invariantmanifolds existing in multi-body dynamical environments. The proposed method enables researchers and astrodynamicists to have an efficient tool for approximating low-thrust reachable sets. The paper is made Open Access! RGate link: https://lnkd.in/edDtGA-z Paper link: https://lnkd.in/ey3QAjJh #Aerospace #Trajectory #Indirect #Reachabiliy #LowThrust #Cislunar #NRHO #Halo #Earth #Mars Auburn University Auburn University, Samuel Ginn College of Engineering

Did you know that NASA holds the Guinness World Record for the largest garage door? The Guinness World Record for the largest garage door belongs to the NASA Vehicle Assembly Building at the Kennedy Space Center in Florida. It measures a staggering 456 feet (139 meters) wide and 76 stories tall. The Vehicle Assembly Building is one of the most iconic buildings of the space age, the building designed to house the upright Saturn V Moon rocket that is so large its shadow is startlingly visible in satellite pictures.? **Designing a Home for the Saturn V ** Designing the massive rocket assembly building fell to four New York firms collectively known as URSAM. Max Urbahn oversaw the architectural aspects of the VAB’s construction, Roberts and Schaefer covered the structural elements, Seelye, Stevenson, Value and Knecht were in charge of all civil, mechanical and electrical engineering considerations, and Moran, Proctor, Mueser and Rutledge were tasked with laying the building’s foundations. The firms designing the VAB had to think through some challenges before settling on the final design. Acoustic pressure and vibrations from a launching Saturn V Was one problem. Though the launch pad was three miles from the site of the VAB, the acoustic pressure of about 145 decibels would have the power to damage the building’s skin. Another concern was the shape of the building. A simple square building tall enough to house the Saturn V could turn into a box kite during a heavy storm. The architects and engineers eventually found solutions to these problems. They settled on a pile foundation and an array of cross-bracing beams to make the building structurally sound against adverse weather. Insulated aluminum panels fastened to steel girders would protect the VAB and anything inside it from any acoustic disturbances during a launch. Sources: NASA; https://lnkd.in/g8TseWjw #GarageDoorFacts #ExcelGarageDoors #SpaceAgeSecurity #GuinnessWorldRecord #NASA #KennedySpaceCenter #garagedoorservices

Did you know that NASA holds the Guinness World Record for the largest garage door? The Guinness World Record for the largest garage door belongs to the NASA Vehicle Assembly Building at the Kennedy Space Center in Florida. It measures a staggering 456 feet (139 meters) wide and 76 stories tall. The Vehicle Assembly Building is one of the most iconic buildings of the space age, the building designed to house the upright Saturn V Moon rocket that is so large its shadow is startlingly visible in satellite pictures.? **Designing a Home for the Saturn V ** Designing the massive rocket assembly building fell to four New York firms collectively known as URSAM. Max Urbahn oversaw the architectural aspects of the VAB’s construction, Roberts and Schaefer covered the structural elements, Seelye, Stevenson, Value and Knecht were in charge of all civil, mechanical and electrical engineering considerations, and Moran, Proctor, Mueser and Rutledge were tasked with laying the building’s foundations. The firms designing the VAB had to think through some challenges before settling on the final design. Acoustic pressure and vibrations from a launching Saturn V Was one problem. Though the launch pad was three miles from the site of the VAB, the acoustic pressure of about 145 decibels would have the power to damage the building’s skin. Another concern was the shape of the building. A simple square building tall enough to house the Saturn V could turn into a box kite during a heavy storm. The architects and engineers eventually found solutions to these problems. They settled on a pile foundation and an array of cross-bracing beams to make the building structurally sound against adverse weather. Insulated aluminum panels fastened to steel girders would protect the VAB and anything inside it from any acoustic disturbances during a launch. Sources: NASA; https://lnkd.in/g8TseWjw #nasa ?#excelgaragedoors #repairandmaintenance #garagedoors #garagedoorexperts #freeestimates #realestate #investment

There are no 'inertial dampeners' with #CTPcraft as such would be alluded to on #StarTrek level #tech. The nature of #CTPEnergy and 'how' CTP Gravitic Modulation 'works' - rather automatically applies such to the #CTPcraft, itself. 'How' precisely does that 'work'? All I will say is that this is because CTP Propulsion (https://lnkd.in/eMSC9emq) is NOT based on Newtonian physics. A CTP craft #spacecraft even flying through a solar system such as ours where micrometeoroid (https://lnkd.in/euXBFmbA) are traveling at high speeds... will not effect a #CTPcraft in transit or produce a big 'ding' in the hull such as this on impact. Nested within the 'T-manifold' of a #CTPcraft's 'modulation field' - a #CTPcraft has its own 'inertial reference frame' as it were - that is not based on physical laws. This is part of 'why' you don't see 'deflector dishes' on #UFOs/#UAPs. (https://lnkd.in/gpxU2422) #space #futurespace #spacetravel #spaceexploration

Cold welding, a solid-state welding process, is fascinatingly common in space, where metal pieces fuse without the need for heat or melting. It's a crucial aspect to consider in spacecraft design and operations. Key points: - **Regular space operation**: Vibration from motors can trigger cold welding between metal contacts, highlighting the importance of precision engineering. - **Launch situations**: Any space mechanism involving metal-metal contact is susceptible to cold welding, emphasizing the need for robust materials and design. - **Space debris impacts**: Cold welding can serve as a repair mechanism post-space debris impacts, showcasing its utility in space missions. In space, the absence of the oxide layer that prevents metal fusion on Earth enables cold welding, also known as contact welding, adhesion, sticking, or stiction. Understanding these phenomena is vital for space exploration and spacecraft durability. #ColdWelding #SpaceTechnology #Engineering #SpaceExploration

Have you ever wondered about the hollow core in the primary and secondary boosters of rockets? Here's why it's necessary: Rockets typically use either solid or liquid propellant in their boosters, which carry fuel and oxidizer. Surprisingly, these boosters aren't filled completely. This is because rockets require immense thrust to lift off. If the tanks were full, fuel burning would proceed gradually, causing delays and resulting in low pressure at the ignition point. After extensive research, NASA devised a solution: creating a hole in the center of the booster tank. This increases the surface area of the propellant, enabling equal and progressive burning, leading to higher pressure thrust at the ignition point. The gases produced escape the engine at higher speeds. However, there are various cross-section designs based on project objectives. The different types of hollow core cross-section designs are given briefly in the following link: https://lnkd.in/dbNau_rm To learn more about rocket engines and their propellants, engine thrust control, and stability control systems, please visit the below link: https://lnkd.in/dkf3Z74d #Rockets #propulsion #Rocketry #Propellants

Revolutionizing Housing: Texas' 3D-Printed Community Nears Completion Texas is on the verge of completing the world’s largest 3D-printed neighborhood in Wolf Ranch, Georgetown. ICON, the company behind this innovation, has nearly finished 100 homes using their massive Vulcan printer, which stands over 45 feet wide and weighs 4.75 tons. This groundbreaking method promises faster, more affordable construction with less waste and fewer workers. The single-story, three- to four-bedroom homes are resilient against extreme weather, termites, and mold, while offering superior insulation from Texas heat. However, the thick concrete walls can impact wireless signals, prompting homeowners to use mesh routers. The "Genesis Collection" homes are priced between $450,000 to $600,000, and over a quarter have already been sold. ICON, known for its first 3D-printed home in Austin in 2018, aims to extend this technology to lunar construction as part of NASA's Artemis Moon exploration program. #3DPrintedHomes #TexasRealEstate #InnovativeConstruction #ICONTech #WolfRanch #FutureOfHousing #SustainableLiving #TechInHousing #HomeInnovation #NASAArtemis