/// CLIMATIC & VIBRATION TESTING NEWSROUND \\\


CAES GR740 has


received QML-V and QML-Q certification from the Defence Logistics Agency


Space grade microprocessor


Aerospace and defence electronics specialist, CAES, has completed environmental testing on its fault tolerant GR740 quad core LEON 4FT processor device, which now has a US Defence Lo- gistics Agency (DLA) qualification and can continue to meet some of the most demanding processing challenges of future space missions. The device can now be ordered to a Standard Military Drawing (SMD) 5962-21204. The pro- cessor has both QML-V and QML-Q military standard quality certification and is ideal for spacecraft on-board computers, payload processing, high altitude avionics or other high reliability radiation hardened aerospace applications. The GR740 device is a system-on-chip (SoC) compo- nent featuring a quad-core fault-tolerant LEON4 SPARC V8 processor, eight port SpaceWire router, PCI initiator/target interface, CAN 2.0 interfaces and 10/100/1,000Mbit Ethernet interfaces. It provides the LEON family’s highest perfor- mance to date with a wide range of inter- faces. The SoC has an excellent performance-to-watt ratio; less than 3W (core typical) with 1,000MIPS (1,700DMIPS) performance. The device is targeted at high-performance gen- eral-purpose processing. The archi- tecture is suitable for both symmetric and asymmetric multiprocessing. Shared resources can be monitored to support mixed-criticality applica- tions. According to Mike Elias, senior vice-


president and general manager of Space Systems Division at CAES, the


company is dedicated to providing radia- tion hardened computing systems to meet the space industry’s most stringent quality and screening levels. “We are excited to see our highest multi-core microprocessor reach this key milestone as we continue to support our customers’ most demanding space missions,” he says.


The device joins the company’s existing line of LEON tech- nology with built-in space application robustness, including the UT699, UT699E and UT700, single core LEON 3FT (prior generation) pro-


cessors, and the dual core GR712RC. 2022 /// Climatic & Vibration Testing \\\ 21 


accelerometer frequency range


PCB Piezotronics has released two upgraded triaxial ICP accelerometers with an in-


creased frequency range that extends upper limits to 10,000Hz at 5 per cent deviation. Models 354B04 and 354B05 are case isolated to help ensure measurement quality in the


presence of electrical noise and both sensors are TEDS IEEE 1451.4 enabled for easy track- ing and record keeping. Models 354B04 and 354B05 were designed with durable and rugged titanium housings to


maintain electrical isolation even if the housing is scratched or damaged during normal use. The hermetically sealed housings are low outgassing by design for use in vacuum environments such as spacecraft testing. Both models have an operating temperature range from -65 to +200°F (-54 to +93°C) and a shock overload limit of ±5,000 g pk. “Case isolation helps to ensure measurement fidelity in the presence of electrical noise that


is typically encountered during electric vehicle vibration testing,” said Bob Metz, director of PCB’s aerospace and defence division. “Models 354B04 and 354B05 are also ideal for flight and ground vibration testing applications for new eVTOL aircraft, environmental stress screen- ing (ESS), modal analysis and structural testing.” The case isolated design eliminates the need for special isolation bases, coatings and insulated mounting screws. The thru-hole mounting configuration allows these ac- celerometers to be rotated 360 degrees prior to tightening the screw, allowing for easy installation. Built-in ICP microelectronics provide a low-noise, low- impedance output signal capable of transmission over hundreds of feet of cable length. Any ICP signal conditioner or data acqui- sition system that incorporates an ICP constant cur- rent power supply can be used to power the accelerometers.


Expanded


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