Features

Calibration Requirements for Testing Coupling-Decoupling Networks

Coupling-Decoupling Networks (CDNs) are the unglamorous workhorses that get “hitched up” to an impulse generator in order to perform impulse testing on powered equipment. As such, performance and calibration requirements for CDNs have not been specified to the same level of detail as the impulse generator. This is no longer the case with the Third Edition of IEC 61000-4-5, the international standard for surge immunity testing.

Posted in: Articles

Read More >>

NASA Monitoring Technologies Shake Up Earthquake Prediction

The seconds to minutes of advance warning of an earthquake can allow people and systems to take actions to protect life and property from destructive shaking. Earthquake early warning systems use earthquake science and the technology of monitoring systems to alert devices and people when shaking waves generated by an earthquake are expected to arrive at their location. NASA has been one of the agencies at the forefront of earthquake early warning technology for many years, and new monitoring techniques developed by NASA are shaking up the way earthquakes are predicted.

Posted in: Articles

Read More >>

Reducing Torque Measurement Uncertainty in Turbine Engine Testing

Torque is among the most important of all the measured quantities in applications ranging from characterizing high-power gas turbines, to determining the level of force required to open a screw cap on a medication container. As anyone who studied physics in high school should recall, torque is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Loosely speaking, torque is a measure of the turning force on an object such as a bolt or a flywheel. For example, pushing or pulling the handle of a wrench connected to a nut or bolt produces a torque (turning force) that loosens or tightens the nut or bolt. However, measuring torque accurately can be far from straightforward. This article offers an overview of one approach to reducing uncertainty in torque measurement using an example of turbine engine testing to illustrate the process.

Posted in: Application Briefs

Read More >>

Linear Motor

Nippon Pulse America (Radford, VA) released the SL083 scaleless linear motor with a built-in linear encoder for positioning applications that would benefit from the repeatability, reliability, and robustness of a linear motor, with up to 5 μm in resolution. The motor consists of a tubular stainless steel shaft and a non-contact forcer. It requires no lubrication, and features a non-critical air gap that eliminates variation in the force. The housing is made of non-magnetic aluminum.

Posted in: Products

Read More >>

Panel-Mount Piezo Drives

The Ndrive QLe digital, panel-mount nanopositioning piezo drives from Aerotech (Pittsburgh, PA) are designed for use with the Aerotech Automation 3200 (A3200) motion controller. The drives enable coordinated motion between piezo stages and servo axes at higher rates than other controller/drive products. Featuring a dual-core, 456-MHz, floating-point DSP, the drives feature position latching and single-axis or multi-axis position synchronized output (PSO) to generate pulses based on actual position feedback.

Posted in: Products

Read More >>

Encoders

Celera Motion (Bedford, MA) introduced the MicroE Veratus™ Series encoders incorporating VeraPath™ technology. All interpolation, automatic gain control (AGC), and signal processing is performed in the sensor head that measures 35 × 13.5 × 10 mm. Interpolation in the sensor head provides resolution from 5 μm to 20 nm for linear applications, with speeds up to 5 m/s. The encoders feature multiple mounting configurations, industry-standard analog and digital incremental encoder outputs, built-in limits, flexible index selection, and status LED in the sensor head.

Posted in: Products

Read More >>

Brushless DC Motors

Crouzet Motors (Vista, CA) introduced brushless DC motors with CANopen® technology. The new communications protocol allows design engineers to connect multiple brushless motors to the various components in a system. The CANopen interface permits connection of up to 127 brushless DC motors with a single, shielded, two-wire cable. Data may be transmitted at speeds up to 125 kBd at distances over 550 yards. At lower baud rates, the transmission distance can exceed three miles, making communications flexible to virtually any location. Under the communications protocol, motors can be controlled separately or together.

Posted in: Products

Read More >>

White Papers

Low Friction Plastic Technology For Single-use Drug Delivery Devices
Sponsored by RTP
From The Design Lab: An Insider’s Guide To Laser Sintering
Sponsored by Stratasys Direct Manufacturing
Case Study: Vance & Hines Wireless Fuel Management System for Motorcycles
Sponsored by Sunstone Circuits
Electropolishing for Hydraulics and Pneumatics
Sponsored by Able Electropolishing
What is Wiring Synthesis?
Sponsored by Mentor Graphics
Evaluating Electrically Insulating Epoxies
Sponsored by Master Bond

White Papers Sponsored By:

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.