An Information Space View of "Time": From Clocks to Open-Loop Control

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Title: An Information Space View of "Time": From Clocks to Open-Loop Control
Author: LaValle, Steven M. ; Egerstedt, Magnus B.
Abstract: This paper addresses the peculiar treatment that time receives when studying control systems. For example, why is the ability to perfectly observe time assumed implicitly in virtually all control formulations? What happens if this implicit assumption is violated? It turns out that some basic control results fall apart when time cannot be perfectly measured. To make this explicit, we introduce information space concepts that permit imperfect time information to be considered in the same way as imperfect state information. We then argue that classical open-loop control should be reconsidered as perfect time-feedback control. Following this, we introduce a notion of strongly open-loop control, which does not require perfect time observations. We provide some examples of these concepts and argue that many fascinating directions for future controls research emerge.
Description: The original publication is available at
Type: Book chapter
ISBN: 978-3-642-03626-2
Citation: S. LaValle and M. Egerstedt. An Information Space View of "Time": From Clocks to Open-Loop Control. Emergent Problems in Nonlinear Systems and Control, pp. 93-106, Springer-Verlag, Berlin, Heidelberg, 2009.
Date: 2009
Contributor: Georgia Institute of Technology. School of Electrical and Computer Engineering
Georgia Institute of Technology. Center for Robotics and Intelligent Machines
University of Illinois at Urbana-Champaign. Dept. of Computer Science
Publisher: Georgia Institute of Technology
Springer Verlag
Subject: Control systems
Open-loop control
Time observations

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