[Colloquium] Reminder: [masters-presentation] Kong/MS Presentation/Dec 10, 2019

[Margaret Jaffey]

Please note the revised time for Will Kong's MS Presentation on
Tuesday (12/10). It will begin at 12:45 pm (not noon as originally
scheduled).

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Date:  Tuesday, December 10, 2019

Time:  12:45 PM

Place:  John Crerar Library 390

M.S. Candidate:  William Kong

M.S. Paper Title: GainSplit: Coordinating controllers through error

Abstract:
Self-adaptation is a valuable property of computing systems, enabling
them to reconfigure themselves to respond to dynamic events while
meeting operational requirements. Control theory has become a popular
framework for implementing adaptive systems because it provides a
framework for formally reasoning about the dynamic behavior of such
systems, but it poses a new challenge: how to coordinate the behaviors
of independent adaptive systems. Several advanced control methods have
been proposed to address this problem including supervisory control
systems, structured singular value controllers, and cascading
controllers. Unfortunately, all of these approaches require that all
control designers are aware of all other controllers that may exist at
design time, which is infeasible as they cannot anticipate the
environments their controllers will run under. To overcome the
limitations of design time coordination, we propose GainSplit, an
interface that allows for the coordination of independent controllers
without coordination at design time by controlling the gain of a
feature common to all feedback controllers, the error signal. The key
insight is that for any combination of controllers, we can set their
error gain values such that they produce the desired target values. We
implement GainSplit on an Android system, with two independent
controllers controlling a single application. We show that this method
allows us to coordinate independent controllers to meet run-time goals
while removing the need for design time coordination.

William's advisor is Prof. Henry Hoffmann

Login to the Computer Science Department website for details:
 https://newtraell.cs.uchicago.edu/phd/ms_announcements#wkong

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Margaret P. Jaffey            margaret at cs.uchicago.edu
Department of Computer Science
Student Support Rep (JCL 350)              (773) 702-6011
The University of Chicago      http://www.cs.uchicago.edu
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