BISC Seminar Announcement , April 9th, 310 Soda Hall, 4pm

Frank Hoffmann (fhoffman@cs.berkeley.edu)
Mon, 6 Apr 1998 04:55:19 +0200 (MET DST)

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B I S C S e m i n a r A n n o u n c e m e n t
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Neuro-Fuzzy Control of the Space Shuttle Training Aircraft

Hamid R. Berenji
Intelligent Inference Systems Corp.
MS:269-2
NASA Ames Research Center
Moffett Field, CA 94035
Fax: (415) 604-3594
email: berenji@ptolemy.arc.nasa.gov

Date : Thursday, April 9th, 1998
Time : 4pm
Location : 310 Soda Hall

Abstract:

A Space Shuttle Training Aircraft (STA) is used by NASA to train
the astronaut pilots to land the Space Shuttle after returning from
orbit. Although the STA is much lighter and smaller than the
Space Shuttle, it simulates, with some trajectory
following error, the aerodynamics of the Space Shuttle.
In this talk, we present a controller that reduces the pitch attitude
and pitch rate errors between the Space Shuttle and
its simulation on STA. Our control system includes a feedforward
controller based on the Zero Phase Error Tracking Control (ZPETC),
and a fuzzy feedback controller, which is tuned by the GARIC algorithm
using Fuzzy Reinforcement Learning.
We present the results of testing this new control system by
means of computer simulations and ground hardware simulator at NASA
JSC. The tuning of the feedback controller
has a significant effect on the track following characteristics
of the system.

This is a joint work with Dr. Sujit Saraf at Intelligent Inference
Systems Corp. and Dr. Steve Swanson at Shuttle Training Branch of NASA
Johnson Space center.

Short Biography: Hamid R. Berenji, Ph.D., is a senior research
scientist at NASA Ames Research Center. He serves on the editorial boards of
several technical publications including IEEE transactions on Fuzzy
Systems, IEEE transactions for Neural Networks, and Fuzzy Sets and
Systems journal. He chairs the IEEE Neural Networks Council's
Technical Committee on Fuzzy Systems.

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Please direct questions with regard to the contents of the talk
and request for papers to the speaker.
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Frank Hoffmann UC Berkeley
Computer Science Division Department of EECS
Email: fhoffman@cs.berkeley.edu phone: 1-510-642-8282
URL: http://http.cs.berkeley.edu/~fhoffman fax: 1-510-642-5775
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