Redesign of composite parts for structural integrity

In the case of composite materials, material properties are vastly dependent on the manufacturing process. While shifting the manufacturing process of a composite part from preimpregnated to a new liquid resin injection process, the Composites Development team at Bombardier Aerospace had to redesign the component to a new set of design allowables. The Integrated Product Development Team (IPDT) was able to quickly provide a turnkey solution that assessed three aspects of airframe engineering: design, materials and processes (M&P), and stress.

Posted in: Technology Update, Aerospace, Defense, Airframes, Forming, Composite materials

UPS Devices Keep UAVs in the Air

The simplistic definition of UAV reads like this:

“An unmanned aerial vehicle (UAV), colloquially known as a drone, is an aircraft without a human pilot on board. Its flight is controlled either autonomously by computers in the vehicle, or under the remote control of a pilot on the ground or in another vehicle.”

Posted in: Articles, Defense, Electronic equipment, Unmanned aerial vehicles

Free Space Optical Communications System for Advancing Superiority on the Battlefield

Fixed and tactical information networking, especially for defense applications, has begun to require increasing data transmission capacity as the volume of information available to warfighters grows through more sophisticated sensors and capabilities. The breadth of the information grid is growing beyond the capacity of radio frequency (RF) or microwave broadband direct line of sight (DLoS) links. RF systems in particular are gridlocked by a congested spectrum, can be limited by licensing issues, and in hostile environments, can be jammed.

Posted in: Articles, Defense, Data acquisition and handling, Telecommunications

The Influence of Material Processing on the Performance of Composite Parts

The production of composite parts relies on an ever increasing number of processing technologies which have a large impact on the performance of the part. The manufacturing step, or processing, is usually optimized for specific materials by using process simulation tools. Commonly used technologies are injection molding, injection-compression molding, compression molding, fiber draping or placement software. All of these approaches are applied in combination with short, long, and continuous fiber reinforced plastics for additional strength. Composite materials are heavily influenced by the processes used to create the part, which can lead to non-uniform material behavior throughout the final manufactured part, adding another challenge to the design process.

Posted in: Articles, Defense, Computer simulation, Composite materials, Fibers, Parts

Kestrel Wide-Area Sensor Upgrades

In late May, Logos Technologies delivered the first payload upgrade to the Kestrel wide-area sensor, employed on U.S. Navy and Army aerostats in Afghanistan. The new hardware will provide better image stability, increased system reliability, and easier maintenance of Kestrel units already in the field.

Posted in: Application Briefs, Articles, Defense, Sensors and actuators, Surveillance, Maintainability and supportability, Military aircraft, Military vehicles and equipment

Post Deployment Build-7 (PDB-7) Software

Raytheon Company (RTN) has started delivering a new release of software, Post Deployment Build-7 (PDB-7), to its worldwide Patriot customer base. The Patriot air and missile defense system protects against advanced threats, including aircraft, tactical ballistic missiles, cruise missiles, and unmanned aerial vehicles.

Posted in: Application Briefs, Articles, Defense, Computer software / hardware, Radar, Military vehicles and equipment, Missiles, Unmanned aerial vehicles

iSLC Flash Technology

Robots have been employed by the military to assist in missions where it would be, and has been, too dangerous to have a human being take on the task. These robots can detect and disable bombs. Some can be thrown into rooms where they land on their “feet”, and scan the room for counter-insurgents. Others blow up mine fields, to ensure safe travel of ground vehicles and the personnel they carry.

Posted in: Articles, Articles, Defense, Electronics & Computers, Architecture, Data management, Robotics, Military vehicles and equipment

Industrial, High-Precision Joystick

CTI Electronics, a supplier of rugged computer peripheral and motion control devices to US armed forces for over 20 years, will manufacture a military-grade, industrial pointing device to retrofit the Navy’s fleet of cruisers and destroyers. In cooperation with Lockheed Martin, CTI is producing the NEMA 4X (IP66) sealed handheld Industrial Mouse™ in a stainless steel enclosure.

Posted in: Application Briefs, Aerospace, Defense, Electronic control systems, Military vehicles and equipment

Formation and Characterization of Gold Nanoparticles

One-dimensional nanowires are of increasing interest due to their size, physical properties, and other applications in opto-electronics. For example, nanowires have already been used in light-emitting diodes and lasers, photo-detectors, resonant tunneling diodes, field-effect and single-electron transistors, and biochemical sensors. In addition, nanowires are useful because they can be grown almost dislocation-free due to their nano dimension. When dislocation- free nanowires nucleated on the substrate merge to form a continuous film, voids are left underneath, which act as sinks for dislocations, allowing other structures to be grown stress-free on top of the nano-engineered buffer layer.

Posted in: Briefs, Materials, Wiring, Nanomaterials

Carbon Nanotube Thermal Interfaces Enhanced with Sprayed-On Nanoscale Polymer Coatings

As the semiconductor industry continually strives to increase the power density of single-chip packages, thermal management remains a critical challenge toward realizing both performance and reliability metrics. One of the primary bottlenecks inhibiting effective thermal management arises from the several interfaces that can exist between the chip and heat sink. Specifically, the thermal resistance of the thermal interface materials (TIMs) that are currently used to bridge these interfaces must be decreased. Carbon nanotubes (CNTs), with their extraordinarily high axial thermal conductivity, have generated tremendous interest as candidates for providing low-resistance TIMs. A potentially scalable and low-cost process was developed that utilizes spray coating to deposit thin polymer films onto the tips of CNTs for bonding at room temperature.

Posted in: Briefs, Materials, Coatings Colorants and Finishes, Nanotechnology, Polymers, Semiconductors