Linear controller design: limits of performance via convex optimization
Article Abstract:
The fundamental problem in the analysis and design of linear control systems, the determination of a control law that meets the design specifications for a particular system and control configuration, can be solved through the simultaneous consideration of all closed-loop transfer functions (transfer matrix H) necessary to evaluate a controller. A recent theoretical result for the parameterization of achievable closed-loop transfer matrices is combined with numerical convex optimization techniques to find solutions for the design specifications of a restricted set of linear and time-invariant (LTI) control systems. An important aspect of the design specification is that the closed-loop system should be stable. A nondifferentiable convex program offers a numerical solution when specifications are all closed-loop convex. Alternative LTI controller design approaches are presented for comparison.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1990
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Simon Simple discovers a niche
Article Abstract:
A hypothetical situation is presented about running a startup engineering firm. An engineer named Simon Simple starts an engineering consulting and specialty technical report preparation firm called Simple Services Inc (SSI) with a $100,000 loan to be repaid with interest from a relative. He is able to win a contract from a manufacturer. However, Simon encounters difficulties with his cash flow. An analysis of his accounting methods will furnish a number of lessons on understanding the financial aspects of a start-up engineering consulting firm.
Publication Name: Journal of Management in Engineering
Subject: Engineering and manufacturing industries
ISSN: 0742-597X
Year: 1999
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What's your favorite location?
Article Abstract:
Actors and film crew discuss their favourite film locations. Natascha McElhone highlights Menerbes, France, while Kirsten Dunst talks of filming in Prague, Czech Republic.
Publication Name: Conde Nast Traveler
Subject: Travel, recreation and leisure
ISSN: 0893-9683
Year: 1999
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