{"id":24885,"date":"2020-11-01T19:07:40","date_gmt":"2020-11-01T17:07:40","guid":{"rendered":"http:\/\/cornay.co.za\/wp\/?p=24885"},"modified":"2020-11-01T19:07:40","modified_gmt":"2020-11-01T17:07:40","slug":"flexible-actuators-spring-into-action-2","status":"publish","type":"post","link":"http:\/\/cornay.co.za\/wp\/2020\/11\/01\/flexible-actuators-spring-into-action-2\/","title":{"rendered":"Flexible Actuators Spring Into Action"},"content":{"rendered":"

Most experiments in flexible robot actuators are based around pneumatics, but [Ayato Kanada] and [Tomoaki Mashimo] has been working on using a coiled spring as the moving component of a linear actuator. Named the flexible ultrasonic motor (FUSM), [Yunosuke Sato] built on top of their work and assembled a pair of FUSM into a closed-loop actuator with motion control in two dimensions<\/a>.<\/p>\n

A single FUSM is pretty interesting by itself, its coiled spring is the only mechanical moving part. An earlier paper published<\/a> by [Kanada] and [Mashimo] laid out how to push the spring through a hole in a metal block acting as the stator of this motor. Piezoelectric devices attached to that block minutely distorts it in a controlled manner resulting in linear motion of the spring.\"\"<\/a><\/p>\n

For closed-loop feedback, electrical resistance from the free end of the spring to the stator block can be measured and converted to linear distance to within a few millimeters. However, the acting end of the spring might be deformed via stretching or bending, which made calculating its actual position difficult. Accounting for such deformation is a future topic for this group of researchers.<\/p>\n

This work was presented at IROS2020<\/a> which like many other conferences this year, moved online and became IROS On-Demand. After a no-cost online registration we can watch the 12-minute recorded presentation<\/a> on this project or any other at the conference. The video includes gems such as an exaggerated animation of stator block deformation to illustrate how a FUSM works, and an example of the position calculation challenge where the intended circular motion actually resulted in an oval.<\/p>\n

Speaking of conferences that have moved online, we have our own Hackaday Remoticon<\/a> coming up soon!<\/p>\n

<\/span><\/p>\n

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Our work is now on #IROS2020<\/a>. We present a flexible ultrasonic motor, which is a novel self-sensing soft actuator.https:\/\/t.co\/FsCrRUULJo<\/a> pic.twitter.com\/AEVsmVqZS4<\/a><\/p>\n

— Ayato KANADA\uff08\u91d1\u7530\u793c\u4eba\uff09 (@AyatoKanada) October 27, 2020<\/a><\/p><\/blockquote>\n

[via Open Robotics Twitter feed<\/a>]<\/p>\n

source https:\/\/hackaday.com\/2020\/11\/01\/flexible-actuators-spring-into-action\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Most experiments in flexible robot actuators are based around pneumatics, but [Ayato Kanada] and [Tomoaki Mashimo] has been working on using a coiled spring as the moving component of a linear actuator. Named the flexible ultrasonic motor (FUSM), [Yunosuke Sato]…<\/span><\/p>\n

Read more Flexible Actuators Spring Into Action<\/span> ›<\/span><\/a><\/div>\n

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