Download or read book Increased Confidence in Concept Design Through Trade Space Exploration and Multiobjective Optimization written by Ryan Glenn Odegard and published by . This book was released on 2008 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing size, complexity and demands of engineering systems requires paying greater attention to the initial design of the system concept. To improve the process by which concept design is carried out, this thesis develops an Engineering Framework for Concept Development. The Engineering Framework is applicable to a diverse range of concept design problems. It helps guide the otherwise haphazard process of the early stages of design to provide confidence that the chosen concept is superior to a large set of alternatives. Accompanying the Engineering Framework is a collection of tools which aid the designer in analyzing different options. Two tools in particular are demonstrated for their mutually beneficial characteristics: 1) Object-Process Network is used to explore the full space of options, revealing the relationships among design decisions and system performance, and 2) a particle.swarm optimization algorithm is implemented to efficiently search through the design space. The use of such an optimization algorithm becomes especially advantageous when higher fidelity models are included in the analysis because it is able to quickly identify the most favorable families of designs. The complementary approaches of exploring the entire trade space and then efficiently searching for the best groups of designs are shown to provide valuable insights in concept design problems. Two case study examples are presented as applications of the Engineering Framework and design tools. The first is an air-launched sounding rocket propulsion system design. The second is the design of a responsive disaster monitoring system. In each case, the use of the Engineering Framework and concept design tools give the designer increased confidence that quality concept designs have been identified.
Download or read book Multi attribute Tradespace Exploration with Concurrent Design for Space System Conceptual Design written by Adam M. Ross and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolutionary Computation in Dynamic and Uncertain Environments written by Shengxiang Yang and published by Springer Science & Business Media. This book was released on 2007-03-07 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles recent advances of evolutionary algorithms in dynamic and uncertain environments within a unified framework. The book is motivated by the fact that some degree of uncertainty is inevitable in characterizing any realistic engineering systems. Discussion includes representative methods for addressing major sources of uncertainties in evolutionary computation, including handle of noisy fitness functions, use of approximate fitness functions, search for robust solutions, and tracking moving optimums.
Download or read book Multi attribute Tradespace Exploration with Concurrent Design as a Value centric Framework for Space System Architecture and Design written by Adam Michael Ross and published by . This book was released on 2003 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Functional Thinking for Value Creation written by Jürgen Hesselbach and published by Springer Science & Business Media. This book was released on 2011-03-18 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: After the IPS2 conferences in Cranfield and Linköping in 2009 and 2010 the 3rd CIRP International Conference on Industrial Product Service Systems (IPS2) 2011 takes place in Braunschweig, Germany. IPS2 itself is defined as “an integrated industrial product and service offering that delivers value in use”. The customers expect comprehensive solutions, which are adapted to their individual needs. IPS2 offers the possibility to stand out from competition and for long-term customer loyalty. Particularly in times of economic crisis it becomes apparent which producing companies understand to satisfy the needs and requirements of their customers. Especially in this relatively new domain IPS2 it will be important to keep track of the whole context and to seek cooperation with other research fields and disciplines. The 3rd CIRP International Conference on Industrial Product Service Systems (IPS2) 2011 serves as a platform for such collaborations and the discussion of new scientific ideas.
Download or read book A Method for Exploring Optimization Formulation Space in Conceptual Design written by Shane K. Curtis and published by . This book was released on 2012 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Formulation space exploration is a new strategy for multiobjective optimization that facilitates both divergent searching and convergent optimization during the early stages of design. The formulation space is the union of all variable and design objective spaces identified by the designer as being valid and pragmatic problem formulations. By extending a computational search into the formulation space, the solution to an optimization problem is no longer predefined by any single problem formulation, as it is with traditional optimization methods. Instead, a designer is free to change, modify, and update design objectives, variables, and constraints and explore design alternatives without requiring a concrete understanding of the design problem a priori. To facilitate this process, a new vector/matrix-based definition for multiobjective optimization problems is introduced, which is dynamic in nature and easily modified. Additionally, a set of exploration metrics is developed to help guide designers while exploring the formulation space. Finally, several examples are presented to illustrate the use of this new, dynamic approach to multiobjective optimization.
Download or read book Aerospace America written by and published by . This book was released on 2007 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying Flexibility in the Operationally Responsive Space Paradigm written by Lauren Viscito and published by . This book was released on 2009 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designing complex space systems that will deliver value in the presence of an uncertain future is difficult. As space system lifetimes are now measured in decades, the systems face increased risk from uncertain future contexts. Tradespace exploration increases the designer's system knowledge during conceptual design and with dynamic analysis can predict the system's behavior in many possible future contexts. Designing flexible systems will allow mitigation of risk from uncertain future contexts and the opportunity to deliver more value than anticipated by the designers. Flexibility is a dynamic property of a system that allows it to take advantage of emergent opportunity and to mitigate risk by enabling the system to respond to changing contexts in order to retain or increase usefulness to system stakeholders over time. Identifying flexible designs has traditionally been accomplished through subjective or heuristic methods, leading to a qualitative assessment of system flexibility. Objective and quantitative measures of flexibility are required for analysis of flexibility in tradespace exploration, as the number of designs is often too large for traditional qualitative approaches. Value Weighted Filtered Outdegree is introduced as a metric for identifying valuably flexible systems in tradespace studies in order to improve decision making during the conceptual design phase. Dynamic Multi-Attribute Tradespace Exploration (Dynamic MATE) is used as the basic tradespace exploration method for Value Weighted Filtered Outdegree. Dynamic MATE applies decision theory to computer simulation of thousands of system designs, across hundreds of unique future contexts. Epoch-Era Analysis is used to parameterize future contexts for dynamic analysis of the designs' performance. Although dominated in static analysis, flexible designs are valuable in the presence of changing contexts. The usefulness of Value Weighted Filtered Outdegree is established through application to the design of a satellite radar system. The metric was able to identify designs that are valuably flexible, and exclude designs that carry change capability that does not add value to the design across selected epochs. Showing another application of Value Weighted Filtered Outdegree, a comparison of flexibility for an Operationally Responsive Space architecture is conducted which highlights the advantages of a modular architecture in the presence of changing user requirements.
Download or read book A Trade Space Model for Robotic Lunar Exploration written by Zachary James Bailey and published by . This book was released on 2010 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last decade has seen a resurgence of interest in the moon as a target for planetary exploration. In light of the growing interest in the robotic exploration of the moon, this thesis presents a quantitative methodology for exploring the trade space of potential in situ robotic lunar spacecraft designs. A science value model was developed, using Multi-Attribute Utility Theory (MAUT), to estimate the effectiveness of a spacecraft design towards assessing a set of specified science objectives. An engineering model was developed to estimate the masses of spacecraft designs within the trade space. These models were integrated together to explore the objectives of minimizing mass and maximizing science return. Two methods for exploration of the trade space were presented: a stochastic design space search method, and a multi-objective simulated annealing method. Using these techniques, the optimality of a reference mission was investigated, and ways to improve science utility performance were shown. The exploration of a trade space under uncertainty, using an -Pareto search method, was investigated, and recommendations for designers were presented.
Download or read book A Trade Space Exploration Process to Optimize Advanced Energy Retrofit Design for Buildings written by Ying Zhang and published by . This book was released on 2013 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Control of Cyber Physical Systems written by Danielle C. Tarraf and published by Springer. This book was released on 2013-06-30 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyber-physical systems (CPS) involve deeply integrated, tightly coupled computational and physical components. These systems, spanning multiple scientific and technological domains, are highly complex and pose several fundamental challenges. They are also critically important to society’s advancement and security. The design and deployment of the adaptable, reliable CPS of tomorrow requires the development of a basic science foundation, synergistically drawing on various branches of engineering, mathematics, computer science, and domain specific knowledge. This book brings together 19 invited papers presented at the Workshop on Control of Cyber-Physical Systems, hosted by the Department of Electrical & Computer Engineering at The Johns Hopkins University in March 2013. It highlights the central role of control theory and systems thinking in developing the theory of CPS, in addressing the challenges of cyber-trust and cyber-security, and in advancing emerging cyber-physical applications ranging from smart grids to smart buildings, cars and robotic systems.
Download or read book Modeling Design and Optimization of Net Zero Energy Buildings written by Andreas Athienitis and published by John Wiley & Sons. This book was released on 2015-03-30 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bei Neubauten wird von den meisten Industrieländern langfristig das Ziel von Netto-Nullenergiegebäuden verfolgt. Dieses Buch hilft Planern bei der optimalen Nutzung von Simulationstools für die Planung von Netto-Nullenergiegebäuden. In dem Buch werden sowohl moderne Modellierungstechniken als auch eingehende Einzelfallstudien vorgestellt. Das Buch wurde von international renommierten Experten erarbeitet und ist im Rahmen folgender Forschungsvorhaben der Internationalen Energieagentur entstanden: Solar Heating and Cooling Programme (SHC) und Energy in Buildings and Communities Programme (EBC).
Download or read book Multiobjective Problem Solving from Nature written by Joshua Knowles and published by Springer Science & Business Media. This book was released on 2008-01-28 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text examines how multiobjective evolutionary algorithms and related techniques can be used to solve problems, particularly in the disciplines of science and engineering. Contributions by leading researchers show how the concept of multiobjective optimization can be used to reformulate and resolve problems in areas such as constrained optimization, co-evolution, classification, inverse modeling, and design.
Download or read book Multi Objective Machine Learning written by Yaochu Jin and published by Springer Science & Business Media. This book was released on 2007-06-10 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, increasing interest has been shown in applying the concept of Pareto-optimality to machine learning, particularly inspired by the successful developments in evolutionary multi-objective optimization. It has been shown that the multi-objective approach to machine learning is particularly successful to improve the performance of the traditional single objective machine learning methods, to generate highly diverse multiple Pareto-optimal models for constructing ensembles models and, and to achieve a desired trade-off between accuracy and interpretability of neural networks or fuzzy systems. This monograph presents a selected collection of research work on multi-objective approach to machine learning, including multi-objective feature selection, multi-objective model selection in training multi-layer perceptrons, radial-basis-function networks, support vector machines, decision trees, and intelligent systems.
Download or read book Proceedings of the ASME Design Engineering Technical Conferences written by and published by . This book was released on 2000 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Artificial Systems for Medicine and Education IV written by Zhengbing Hu and published by Springer Nature. This book was released on 2021-01-29 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest advances for the development of artificial intelligence systems and their applications in various fields from medicine and technology to education. The proceedings comprise refereed papers presented at the Fourth International Conference of Artificial Intelligence, Medical Engineering, Education (AIMEE2020), held at the Mechanical Engineering Institute of the Russian Academy of Sciences, Moscow, Russia, in 3–4 October 2020. Given the rapid development of artificial intelligence systems, the book emphasizes the need for the intensification of training of a growing number of relevant specialists, in particular, in medical engineering to increase the effectiveness of medical diagnosing and treatment. In digital artificial intelligence systems, scientists endeavor to reproduce the innate intellectual abilities of human and other organisms, and the in-depth study of genetic systems and inherited biological processes can provide new approaches to create more and more effective artificial intelligence methods. Topics of the included papers concern thematic materials in the following spheres: mathematics and biomathematics; medical approaches; technological and educational approaches. The book is a compilation of state-of-the-art papers in the field, covering a comprehensive range of subjects that is relevant to business managers and engineering professionals alike. The breadth and depth of these proceedings make them an excellent resource for asset management practitioners, researchers, and academics, as well as undergraduate and postgraduate students interested in artificial intelligence and bioinformatics systems as well as their growing applications. Intended readership includes specialists, students, and other circles of readers who would like to know where artificial intelligence systems can be applied in the future with great benefit.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
