An email message pointed me to the application note, “Electrical measurements on adjustable speed drives,” published by Fluke Corporation, a company that manufactures test-and-measurement instruments. The note’s introduction states, “…modern electronically controlled motors, more commonly referred to as adjustable speed drives, present a unique set of problems that can vex the most seasoned pro. This application note describes the electrical measurements you need to make during the installation and commissioning of a drive, as well as when diagnosing bad components and other conditions that may lead to premature motor failure in adjustable speed drives (ASDs).”
Although the writers at Fluke aimed the paper at motor technicians, it provides a lot of useful information about drives that engineers and equipment designers will value. The ten measurement descriptions include schematic diagrams and oscilloscope waveforms, which reinforce the points made for many tests.
If you work with adjustable-speed drives, this application note belongs in your library or in your browser’s favorites list. Feel free to suggest other useful mechatronics app notes that could help your colleagues. –Jon Titus
Some humanoid walking robots are also good at running, balancing, and coordinated movements in group settings. Several of our sports robots have won regional or worldwide acclaim in the RoboCup soccer World Cup, or FIRST Robotics competitions. Others include the world's first hockey-playing robot and a trash-talking Scrabble player.
A recent example of a major CAE revamp is MSC Apex, released last month by MSC Software Corp. In a discussion with Design News, MSC executives noted that its next-generation platform is designed to substantially reduce CAE modeling and process time, “in some cases from weeks down to hours.”
The Thames Deckway would run for eight miles close to the river’s edge, rising and falling slightly with the tidal cycle. It will generate its own energy from a series of devices that will line the pathway and use a combination of sources to make the path self-sustaining.
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