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Design tool

About: Design tool is a research topic. Over the lifetime, 3864 publications have been published within this topic receiving 46401 citations.


Papers
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Journal ArticleDOI
TL;DR: An improved cost function for the voltage control of the flying capacitors is proposed in this paper, which offers a capacitor voltage control that corresponds more closely with the desired behavior and adds a limitation on the capacitor voltage deviation.
Abstract: Recently, there has been an increase in the use of finite-set model-based predictive control (FS-MBPC) for power-electronic converters. However, the computational burden for this control scheme is very high and often restrictive for a good implementation. This means that a suitable technology and design approach should be used. In this paper, the implementation of FS-MBPC for flying-capacitor converters in field-programmable gate arrays (FPGAs) is discussed. The control is fully implemented in programmable digital logic by using a high-level design tool. This allows us to obtain very good performances (both in control quality, speed, and hardware utilization) and have a flexible, modular control configuration. The good performance is obtained by exploiting the FPGA's strong points: parallelism and pipelining. Furthermore, an improved cost function for the voltage control of the flying capacitors is proposed in this paper. Typical cost functions result in tracking control for the flying-capacitor voltages, although this does not correspond with the desired system behavior. The improved cost function offers a capacitor voltage control that corresponds more closely with the desired behavior and adds a limitation on the capacitor voltage deviation. Furthermore, the selection of the weight factor in the cost function becomes less critical.

97 citations

Journal ArticleDOI
TL;DR: In this article, a zero-dimensional model for the design of radial turbo-expanders for ORC applications is discussed, with special reference to the estimation of losses and efficiency; a comparison between different fluids (R134a, R1234yf, R236fa, R245fa, Cyclohexane, N-Pentane) is presented and discussed, referring to a typical small-size application (50kW).

97 citations

Proceedings Article
13 Jul 1987
TL;DR: The kinds of analysis Prompt performs on beams and how it makes innovative changes to prototypes are described, which show how the system works in the domain of structural design.
Abstract: We describe a system, Prompt, used to design physical systems. Prompt employs a multi-level approach to design. When simple constraint propagation over prototypes [Adda85] fails, Prompt can significantly modify prototypes by reasoning about their structure and physics. Prompt derives the behavior of a prototype from its structure using knowledge of physics stored in a Graph of Models. It then uses heuristics called Modification Operators to control the process of modifying the prototypes. In this paper we describe how our system works in the domain of structural design. We describe the kinds of analysis Prompt performs on beams and how it makes innovative changes to prototypes.

96 citations

Patent
14 Aug 2007
TL;DR: In this paper, the authors present a system for creating and viewing simulation models that are used for managing requirements and design specifications for complex systems. But the simulation model is not designed for non-technical users.
Abstract: A system for creating and viewing simulation models that are used for managing requirements and design specifications for complex systems. Users simultaneously collaborate on the description of a complex system such as an enterprise software project throughout its life cycle. User interfaces, designed to assist in the visualization of a particular form of knowledge, allow users to describe the complex system with simple interactive elements. Information in all perspectives is presented so that it is legible and discernable to a non-technical audience. Multi-dimensional data structures record all the resulting information, creating a simulation model of the complex system, and the tasks required for construction and maintenance. Tasks are driven from the specifications not as a separate activity, but as part of the same activity to facilitate project management by allowing decisions to be tracked virtually throughout the simulation model.

95 citations

Journal ArticleDOI
TL;DR: In this article, the formulation, development and application of windows of operation are discussed for a range of biological processes including fermentation, protein recovery and biotransformation, and they are used to understand and optimise a bioprocess design.
Abstract: Bioprocess design problems are frequently multivariate and complex. However, they may be visualised by a graphical representation of the design constraints and correlations governing both the process and system under consideration, namely windows of operation. Windows of operation exist at all stages of process design and find use both in the identification of key constraints from limited information, and also, with more detailed knowledge, the sensitivity of a process to design or operating changes. In this way windows of operation may be used to help understand and optimise a bioprocess design. In this paper the formulation, development and application of windows of operation is discussed for a range of biological processes including fermentation, protein recovery and biotransformation.

95 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20233
20227
202184
2020133
2019139
2018157