Using Sintered Fiber Metal Composites for Aircraft Acoustic Attenuation

Sintered fiber metal composites are used in aircraft as an acoustic media within environmental ducting, inlet and exhaust systems. The material can be engineered to meet specific acoustic attenuation and noise reduction goals within these applications. Sintered metal fiber composites have proven reliable and effective since the 1950's, but continue to deliver new value through ongoing investment and new use cases.

Posted in: Articles, Aerospace

Topology Control in Aerial Multi-Beam Directional Networks

Comparing the performance of a centralized algorithm that retains robust connectivity and reduced throughput to a distributed algorithm that offers higher throughput but fewer network nodes.

In multi-beam directional networks, nodes are able to simultaneously transmit to all neighbors or receive from all neighbors. This spatial reuse allows for high throughputs, but in dense networks can cause significant interference. Topology control (i.e., selecting a subset of neighbors to communicate with) is vital to reduce the interference. Good topology control balances the number of links utilized to achieve fewer collisions while maintaining robust network connectivity.

Posted in: Briefs, Aerospace, Test & Measurement

Using Thermal Simulation to Model the Effects of Wind on the Mars Curiosity Rover

The Centro de Astrobiología (CAB), a joint center of Consejo Superior de Investigaciones Cientificas and the Instituto Nacional de Tecnica Aeroespacíal (CSIC-INTA), designed and built the weather monitoring station contributed by the Spanish government as part of the payload of the Mars Science Laboratory (MSL) rover, Curiosity, which landed on Mars in August 2012 (Figure 1).

Posted in: Articles, Aerospace

GaN Breaks Barriers

RF Power Amplifiers Go Wide and High

The increasing demand for higher data rates in telecommunications and higher resolution in industrial systems is pushing the frequency of operation higher for the electronics that support them. Many of these systems operate over a wide frequency spectrum, and further increased bandwidth requirements are a common request for new designs. Across many of these systems there is a push to use one signal chain for all frequency bands.

Posted in: Articles, Aerospace, RF & Microwave Electronics

Simulation Results Could Help Quiet Jet Noise

Argonne National Laboratory engineers are working to create high-fidelity computer simulations to determine how jet turbulence produces noise. Working on Argonne’s supercomputer Mira, the team is applying computational fluid dynamics to capture the physics of the turbulence that is making the noise.

Posted in: News, Defense, Electronics & Computers, Simulation Software

NASA Tests Multi-Material 3D-Printed Rocket Engine Part

NASA engineers tested a 3D-printed rocket engine prototype part made of two different metal alloys via an advanced manufacturing process. The part was low-pressure, hot-fire-tested more than 30 times to demonstrate the functionality of the igniter.

Posted in: News, Defense, Test & Measurement

Airline Industry Could Soar on Sugarcane Fuel

Plants Engineered to Replace Oil in Sugarcane and Sweet Sorghum (PETROSS), funded by the Advanced Research Projects Agency - Energy (ARPA-E), has developed sugarcane that produces oil, called lipidcane, that can be converted into biodiesel or jet fuel in place of sugar that is currently used for ethanol production. With 20% oil – the theoretical limit – all of the sugar in the plant would be replaced by oil.

Posted in: News, Defense, Alternative Fuels, Biomass, Renewable Energy

6 Critical Errors to Avoid in Reusable Packaging Design

Designing a reusable, durable packaging solution for your product or service is much more than picking a type of package and a size. There are many things to consider about how your product will be used, where it will be used, and who will be using it. This list of six common errors will ensure your initial design decisions put you on the path to the most cost- effective case that combines the required protection with superior usability.

Posted in: White Papers, White Papers, White Papers, Defense, Electronics, Test & Measurement

Sound-Off: With High-Speed Data, How Important is Signal Integrity?

Modern avionics are highly dependent on reliable connectivity — and reliable interconnection systems. As data rates inevitably improve to address greater military requirements, how will the increase impact signal integrity?

Posted in: News, News, Aviation, Data Acquisition, Defense

Strong and Stretchable “Super Steel”

In aerospace applications of materials, increasing strength often leads to a decrease in ductility. Engineers have developed a Super Steel that addresses this strength-ductility tradeoff. In addition to the substantial improvement of tensile properties, the steel has low raw-material cost and simple industrial processing.

Posted in: News, Defense, Materials, Metals