NDLI: Physics-based encapsulation in embedded software for distributed sensing and control applications

Content Provider	IEEE Xplore Digital Library
Author	Zhao, F. Bailey-Kellogg, C. Fromherz, M.P.J.
Copyright Year	1963
Abstract	Spatial Aggregation abstracts data arising from distributed embedded sensing and control applications as a set of so-called spatio-temporal objects. Locality and continuity in the underlying physics of a problem domain give rise to spatially coherent and temporally contiguous objects in an appropriate metric space. Once parameterized by physical properties such as location, intensity (e.g., light, temperature, pressure), and motion (e.g., velocity), these objects can be aggregated and abstracted into more abstract descriptions. Applications are written as the creation and transformation of these abstract objects. We illustrate how these objects naturally arise from applications such as distributed sensing and actuation, and use an air-jet table system to demonstrate how such a physics-based encapsulation modularizes the design of sensing and control software. Unlike in traditional software design, where objects and operations are defined mathematically and possess a semantics independent of possible implementations, the objects in distributed embedded software are defined by the physics of the application, algorithmic considerations, and task requirements, as well as optimization criteria. The air-jet table example demonstrates that the grouping and abstraction of actuation devices are determined by laws of motion, the type of force allocation algorithms used, and the desired performance of the controller; this encapsulation greatly simplifies the design and implementation of a force allocation algorithm for the system and improves software modularity. Based on our practical experiences in designing several massively distributed sensing and actuation systems, we present a set of recommendations for distributed embedded software modeling and design.
Sponsorship	IEEE Publication
Starting Page	40
Ending Page	63
Page Count	24
File Size	1095339
File Format	PDF
ISSN	00189219
Volume Number	91
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-01-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Encapsulation Embedded software Distributed control Application software Software algorithms Physics Control systems Software design Abstracts Spatial coherence
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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