U-Space Nanosatellites’ Post

👉 Our latest article on "Low-Earth orbit satellite constellations for global communication network connectivity" has just been published in Nature Reviews Electrical Engineering. Read it here: https://rdcu.be/dTRrB. w/ Björn Ottersten Symeon Chatzinotas, SnT, Interdisciplinary Centre for Security, Reliability and Trust

23.12.26. Re-post of 3 and 4 Phases Telsa used all Square and Star Connections for the 4 Phase Machines he Built for Primary Windings, and the secondary Windings are 2 Phases. Edison used 3 Phases on the Primary - Delta, and a Wye as means to discharge the design reactances of not having 4 Phases and using Earth as the Return Path of the Non Zero Sum Sequences - of Unbalanced Motor Loads. Telsa System used only Square or 4 Point Star a connections, thus at every Source - Generator, Motor, Transformers and the Bus, Cable and Lines of the System - the Magnetic Reactions had neglible capacitance to neutral and/or ground at any point of the system. Total Redundancy and Highly Efficient, and Completely Sychronized on both Generator and at the Motor Loads. The Top Power Switchgear Engineer in Berlin finds these posts Interesting. Next Summer I will travel to Berlin to discuss with the Machine and Switchgear Magnetics Experts in Detail. They admit they are curious about my Posts but need Utility Acceptance of the Theory to Push Funding with Senior Management to Build it. No easy task as this is a Utility Solution that the Manufacturers cannot Drive - thanks to Antitrust (Big Government Rules) and Standard Laws regulations or bodies such as IEC and IEEE. However from time to time, and if Technology rules - men can become creative to find a way, like Star Trek - theme, to find new worlds.

Stripline vs. Microstrip for a transmission line. What are the differences? 👇🏼 Stripline: 🔹 Signal between two ground planes 🔹 Purely transverse electromagnetic modes (TEM) 🔹 Less coupling to other striplines and lesser stray radiation 🔹 Wider bandwidth of operation 🔹 Harder to manufacture and integrate with components Microstrip: 🔹 One ground plane below signal, dielectric on top 🔹 Quasi TEM operation 🔹 More coupling to other microstrip, more radiation 🔹 Lower bandwidth of operation 🔹 Easier to manufacture and integrate with components While striplines are generally the "better" transmission line medium, microstrip has mostly won out due to the ease of use. What other insights do you have about transmission lines? Let me know in the comments. Follow me (🔔) for posts on engineering.

A new NATO-funded effort led by Greg Falco ’10, assistant professor of mechanical and aerospace engineering at Cornell Engineering, seeks to make the internet less vulnerable by rerouting its flow of information to space if the underwater cables that transmit the world’s communications are attacked or accidentally severed. “Ninety-five percent of all communications flow through subsea fiberoptic cables. If those go down, we’re done as an IT society,” Falco said. “What we want to do, ultimately, is create a new backbone for the internet and redesign how it flows. And we can do that by creating this hybrid submarine cable network and satellite communication network that works together seamlessly in order to relay data to the relevant parties.” You can learn more about this by visiting https://lnkd.in/g5zniei2

The Story of the Transatlantic Telegraph and the World’s First Internet Electrical telegraphy can be considered to be the first example of electrical engineering. Electrical telegraphs were point-to-point text messaging systems that were first used around 1840. This presentation traces the formative years of electrical engineering and the evolution of transmission line engineering that enabled a global communications network over 180 years ago! https://lnkd.in/eEEBhbrZ

[JMAG Users Conference Proceedings] Rolls-Royce Deutschland Ltd & Co KG The electrification of aircraft is playing a significant role in reducing the aviation industry's environmental footprint. The industry presents specific challenges to design engineers due to the design constraints. Developing an electric propulsion system that meets the desired efficiency and power-to-weight ratio requires efficient tools and workflows to cover all design aspects and facilitate interdisciplinary collaboration. In an agile environment, quick response from the design engineering team to volatile requirements is crucial. Since the electromagnetic design is usually laying the foundation for other disciplines to build upon, a fully parameterized model stripped down to a low as reasonably possible simulation time is used to explore the available design space for new sets of requirements and provide appropriate design variants on short notice. Assessing relevant key figures on the way, engineers directly have the data on hand required to make informed decisions, thus fostering agile electrical machine development for time-critical project demands. #JMAG #RollsRoyce #Optimization #MagneticField

In 2017 I designed the Structured Porous Coated Cylinder (SPCC) [top-left image]. The motivation for the design was to visualise the internal flow field within porous media, and understand how and why porous media can be highly-effective in reducing vortex shedding noise and turbulence in the wake of a cylinder. This could be achieved by exploiting the regularity of the pore structure, giving clear line of sight in the radial and spanwise directions, and allowing direct simulation of the porous structure and experimental quantification of the internal flow field. Since I first presented the design at the AIAA Aviation Forum in 2018, the SPCC design methodology has been replicated and modified by (at least, to the best of my knowledge) seven institutions, in both numerical and experimental studies, and used in a diverse array of applications, ranging from passive flow control in ocean engineering, blunt trailing-edge attachments, and heat transfer purposes. The publication explaining the SPCC design methodology can be sought here: https://lnkd.in/g3UqQ6AV In the forthcoming 30th AIAA/CEAS Aeroacoustics Conference (Aeroacoustics 2024) in Rome (June 4-7), there will be (to the best of my knowledge) five SPCC-based presentations. I find it very rewarding to see my design and its modifications take form and have some impact in the global aeroacoustics community.

Any product that merges mechanical, electronic, and software engineering requires a sophisticated production chain. Satellites take #manufacturing a notch further by adding layers of control engineering, remote operations, and quality assurance dictated by their unforgiving operational environment. Painting a detailed picture of what goes into making satellites is a daunting task by itself, but we at least tried to give you a general idea in our latest blog post. Peel away at these different layers of satellite manufacturing on our blog linked below. #NewSpace #nanosatellites #smallsats

I just completed GE Aerospace's Explore Electrical Engineering on Forage. In the simulation I : Completed a job simulation involving electrical system design and troubleshooting navigation issues under adverse conditions, enhancing skills in aerospace systems engineering. Acquired technical proficiency in electrical distribution planning, circuit breaker selection, and compliance with aerospace standards using industry-standard tools and methodologies. Developed critical thinking and problem-solving abilities to diagnose and strategize solutions for avionics reliability in challenging environmental conditions, employing simulation software for environmental impact assessment. Strengthened technical documentation and reporting skills, creating comprehensive design proposals and assessment plans that adhere to rigorous aerospace engineering protocols and safety requirements.