Searching for just a few words should be enough to get started. If you need to make more complex queries, use the tips below to guide you.
Article type: Research Article
Authors: Flores, Juan J.; | Farley, Arthur M.
Affiliations: Universidad Michoacana, Morelia 58030, Mexico E‐mail: [email protected] | University of Oregon, Eugene, OR 97403, USA E‐mail: [email protected]
Note: [] Corresponding author.
Abstract: Most of the work on behavior prediction in the field of Qualitative Reasoning has focused on transient behavior and responses to perturbations; very little has been done regarding systems in steady state. A large class of systems, especially in the area of power systems, are designed for sinusoidal steady‐state operation. Thus, an understanding of the steady state behavior of electrical circuits is very important. This article presents a framework for reasoning about linear electrical circuits in sinusoidal steady state. The reasoning process relies on a constraint‐based model of the circuit, derived from electro‐magnetic theory and generated automatically from the structure of the circuit. In a linear circuit operating in steady state, all quantities are sinusoidals of the same frequency as the source. Since any sinusoidal can be expressed as the real part of a complex exponential, we use the complex form, which simplifies computations; this complex form, characterized by magnitude and angle, is called a phasor. In order to capture magnitude and phase angle information in the model, all constraints operate on phasor variables. Constraint Propagation (CP) is the main inference mechanism. The CP module reasons with as much information and precision as the user provides, ranging from qualitative to quantitative. Intervals provide a general representation mechanism. The framework presented in this article has been implemented in a program called Qualitative Phasor Analysis (QPA), which performs circuit analysis, parameter design, diagnosis, control design, and structure simplification. Circuits with multiple sources are solved using the superposition principle.
Keywords: Qualitative reasoning, model‐based reasoning, constraints, constraint propagation, phasors
Journal: AI Communications, vol. 12, no. 1‐2, pp. 61-77, 1999
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
[email protected]
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office [email protected]
Inspirees International (China Office)
Ciyunsi Beili 207(CapitaLand), Bld 1, 7-901
100025, Beijing
China
Free service line: 400 661 8717
Fax: +86 10 8446 7947
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
如果您在出版方面需要帮助或有任何建, 件至: [email protected]