Mechanical Components

Hydraulic Cylinder Position Sensor Technology

As the demand for greater control and functionality increases, position-sensor-instrumented hydraulic cylinders are becoming more important in the heavy industry, mobile equipment, and subsea worlds. Position sensors for feedback in hydraulic or pneumatic cylinders have typically used one of three technologies: Linear Variable Inductance Transducers (LVITs), variable resistance potentiometers (Pots), or magnetostrictive transducers (MLDTs). While other sensor technologies have occasionally been used in these applications, the focus of this article is a comparison among these three popular technologies. Ultimately, a user or systems integrator must determine the exact requirements of the application and which technology best satisfies them on a total installed cost versus performance basis. The strengths and weaknesses of linear variable inductance, variable resistance pots, and magnetostrictive sensors are all examined below, together with a feature-by-feature comparison chart.

Posted in: Articles, Aerospace, Defense, Mechanical Components, Positioning Equipment, Power, Power Transmission, Data Acquisition, Sensors, Test & Measurement
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Sound Attenuation of Neoprene Wetsuit Hoods as a Function of Dive Depth and Acoustic Frequency: Hyperbaric Chamber Trials

The U.S. Navy is interested in strategies that divers could employ to protect them from loud underwater sounds. Sonar transmissions and other forms of underwater sound, such as that produced by noisy underwater tools, are an occupational hazard for U.S. Navy divers.

Posted in: Briefs, Aerospace, Data Acquisition, Defense, Machinery, Mechanical Components, Data Acquisition, Measuring Instruments, Test & Measurement
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New Products: May 2019 Aerospace & Defense Technology

Ultra-Low Temperature Elastomer

Greene Tweed’s (Kulpsville, PA) Fusion™ FKM 665, a new generation, ultra-low-temperature and chemical-resistant elastomer, was specifically formulated to meet and exceed the requirements of Aerospace Material Specification (AMS) 7379 and AMS-P-83461. With a temperature range of -70°F to 450°F (-57°C to 232°C), Fusion™ 665 achieves outstanding low-temperature performance without compromising high-temperature performance.

Posted in: Products, Aerospace, Data Acquisition, Defense, Computers, Electronic Components, Electronics & Computers, Imaging, 3 D Printing & Additive Manufacturing, Industrial Controls & Automation, Manufacturing & Prototyping, Rapid Prototyping & Tooling, Materials, Metals, Fastening, Joining & Assembly, Machinery, Mechanical Components, MEMs, Motion Control, Motors & Drives, Positioning Equipment, Data Acquisition, Sensors, Computer-Aided Design (CAD), Simulation Software, Inspection Equipment, Measuring Instruments, Monitoring, Test & Measurement
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Thermoplastic Drive Shaft System Developed for Aerospace Applications

herone GmbH, (Dresden, Germany) recently won the prestigious 2019 JEC Innovation Awards, in the Aerospace application category. The winning application was the company's all-thermoplastic drive-shaft system overmolded with an integral gear, designed for use in aerospace applications.

Posted in: INSIDER, News, Aerospace, Defense, Thermal Management, Materials, Plastics, Joining & Assembly, Machinery, Mechanical Components, Motion Control, Motors & Drives, Positioning Equipment
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How FMC Developments Support Legacy and Next-Gen Data Needs

While FMC (FPGA Mezzanine Card) celebrated its 10th anniversary this year, it continues to provide a variety of benefits to the embedded system developer. These include sustained implementation and deployment in new technologies. Additionally, the release of FMC+ provides improved design capabilities. However, with data rates always on the rise and shrinking form factors, the question arises: Why does FMC continue to be so popular and what has sustained it over the years?

Posted in: Articles, Aerospace, Data Acquisition, Fastening, Joining & Assembly, Mechanical Components, RF & Microwave Electronics, Data Acquisition, Sensors
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An Integrated Framework for Complex Radar System Design

Modern radar systems are complex and depend heavily on advanced signal processing algorithms to improve their detection performance. At the same time, the radio front-end must meet challenging specifications with a combination of available components, implementation technologies, regulatory constraints, requirements from the system, and signal processing. This application example shows how NI's Visual System Simulator™ (VSS) system simulation software enables radar system architects and RF component manufacturers to design, validate, and prototype a radar system.

Posted in: Articles, Aerospace, Mechanical Components, Antennas, RF & Microwave Electronics
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Thermoplastic Composites to Play Enhanced Role in Next-Generation Aerospace Applications

Advanced thermoplastic composites-and their emergence as prominent materials for future aerospace applications–are sparking a flurry of activity from aerospace manufacturers, designers, component producers and formatters.

Posted in: Articles, Aeronautics, Aerospace, Aviation, Thermal Management, Manufacturing & Prototyping, Composites, Materials, Plastics, Mechanical Components
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Understanding the “Black Art” of RF and Microwave Switching

Understanding RF, especially microwave switching, can be a challenge. In many cases, test systems have been compromised because a test engineer did not consider all the components of their test system: instruments, switching, cabling, Mass Interconnect (test fixture interface), fixture design, and so on. Each component has its own set of characteristics. With RF and microwave components, effects including insertion loss, VSWR, bandwidth, and so on all need to be considered as well.

Posted in: Articles, Aerospace, Electronic Components, Electronics, Electronics & Computers, Joining & Assembly, Mechanical Components, RF & Microwave Electronics, Instrumentation, Measuring Instruments, Test & Measurement
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Using Ruggedized Test Equipment to Solve Jet Engine Problems

A jet engine is the very definition of “mission-critical.” A critical failure could cause a serious accident that endangers hundreds of lives. To prevent this from happening, manufacturers perform extensive testing on jet engine components, systems, and manufacturing processes.

Posted in: Articles, Aeronautics, Aerospace, Data Acquisition, Defense, Manufacturing & Prototyping, Joining & Assembly, Mechanical Components, Data Acquisition, Instrumentation, Measuring Instruments, Test & Measurement
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New Products: April 2019 Aerospace & Defense Technology

Ruggedized Software Defined Radio Solutions

Pixus Technologies (Waterloo, Ontario) has developed ruggedized versions of commercial software defined radios. The RX310, the first in the series of small form factor ruggedized devices, utilizes the USRP software defined radios from Ettus Research, a National Instruments brand. The weatherproof enclosure features IP67 sealing for water and dust ingress. It is also designed for MIL-STD-810 for shock/vibration and MIL-STD-461 for EMI. The RX310 contains two extended bandwidth daughterboard slots covering 10 MHz – 6 GHz with up to 160 MHz of baseband bandwidth, dual 1/10 GigE high-speed interfaces, and a large user-programmable Kintex-7 FPGA. The unit is 302mm wide × 400mm long × 98mm tall with conduction-cooled fins for heat dissipation.

Posted in: Products, Board-Level Electronics, Computers, Electronic Components, Electronics, Power Management, Power Supplies, Mechanical Components, Power, RF & Microwave Electronics, Data Acquisition, Sensors, Software
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