[Colloquium] TTI-C Talks; This Thursday July 28th at 9:30 am (Masatake Higashi & Katsushi Furutani of TTI-J)

[Katherine Cumming]

TOYOTA TECHNOLOGICAL INSTITUTE (Japan) TALKS
 
(1)
Speaker:  Masatake Higashi, TTI-J
Speaker's homepage:  http://www.toyota-ti.ac.jp/
 
Time:  Thursday, July 28th, 9:30am
Location:  TTI-C Conference Room 
 
Title: Collaborative Feature Modeling by Managing Exclusive Use of Faces
Abstract:
I will talk on a method which gives a solution of the collaborative
design in the network environments. The method uses face-based
representation which has been developed by the speaker's group for
expressing and manipulating solid and feature models symbolically. The
method enables designers in the network to design a single product in a
similar environment to a single user by managing minimum exclusive use
of a partial shape expressed by a set of faces. A prototype system has
been developed on a Java client-server architecture, and some examples
are shown to demonstrate the effectiveness of the system.
(2)
Speaker:  Katsushi Furutani, TTI-J
Speaker's homepage:  http://www.toyota-ti.ac.jp/kikai/5k60/furutani/
 
Time:  Thursday, July 28th, 10:15am
Location:  TTI-C Conference Room 
Applications of piezoelectric actuators to precision positioning
Abstract:
- An introduction of AZARASHI (Seal) Mechanism - 

I would like to introduce a small mobile device, "AZARASHI (Seal)
Mechanism," with three degrees of freedom (DOF) for precision
positioning. An L-shaped structure of Seal mechanism is proposed to
reduce the interference among the axes. This device consists of two
controlled Electromagnets CA and CB connected by two piezoelectric
actuators PA and PB with Electromagnet CC that generates a constant
friction. The friction at Electromagnets CA and CB are changed by on-off
control. The whole device wriggles with Electromagnets CC when the
piezoelectric actuators extend and contract. The 3-DOF device can move
up to micrometer steps in the x- and y-directions and rotates up to
submilliradian steps in the q-direction. The movable range is infinite
in principle. Performance of coarse mode is investigated in detail. Seal
Mechanism performs as well as the inchworm mechanism. Seal Mechanism has
smaller number of controlled actuator and is driven by smaller number of
steps than the multiple-DOF positioning stages by using the inchworm
mechanism. 
 
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If you have questions, or would like to meet the speaker, please contact
Katherine at 773-834-1994 or kcumming at tti-c.org.   For information on
future TTI-C talks and events, please go to the TTI-C Events page:
http://www.tti-c.org/events.html.  TTI-C (1427 East 60th Street,
Chicago, IL  60637)
 
 
 
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