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Aircraft Family Design Using Enhanced Collaborative Optimization
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Book Synopsis Aircraft Family Design Using Enhanced Collaborative Optimization by : Brian Douglas Roth
Download or read book Aircraft Family Design Using Enhanced Collaborative Optimization written by Brian Douglas Roth and published by . This book was released on 2008 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aircraft Design Using Collaborative Optimization by : Ian P. Sobieski
Download or read book Aircraft Design Using Collaborative Optimization written by Ian P. Sobieski and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metamodel-Based Multidisciplinary Design Optimization of Automotive Structures by : Ann-Britt Ryberg
Download or read book Metamodel-Based Multidisciplinary Design Optimization of Automotive Structures written by Ann-Britt Ryberg and published by Linköping University Electronic Press. This book was released on 2017-09-14 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multidisciplinary design optimization (MDO) can be used in computer aided engineering (CAE) to efficiently improve and balance performance of automotive structures. However, large-scale MDO is not yet generally integrated within automotive product development due to several challenges, of which excessive computing times is the most important one. In this thesis, a metamodel-based MDO process that fits normal company organizations and CAE-based development processes is presented. The introduction of global metamodels offers means to increase computational efficiency and distribute work without implementing complicated multi-level MDO methods. The presented MDO process is proven to be efficient for thickness optimization studies with the objective to minimize mass. It can also be used for spot weld optimization if the models are prepared correctly. A comparison of different methods reveals that topology optimization, which requires less model preparation and computational effort, is an alternative if load cases involving simulations of linear systems are judged to be of major importance. A technical challenge when performing metamodel-based design optimization is lack of accuracy for metamodels representing complex responses including discontinuities, which are common in for example crashworthiness applications. The decision boundary from a support vector machine (SVM) can be used to identify the border between different types of deformation behaviour. In this thesis, this information is used to improve the accuracy of feedforward neural network metamodels. Three different approaches are tested; to split the design space and fit separate metamodels for the different regions, to add estimated guiding samples to the fitting set along the boundary before a global metamodel is fitted, and to use a special SVM-based sequential sampling method. Substantial improvements in accuracy are observed, and it is found that implementing SVM-based sequential sampling and estimated guiding samples can result in successful optimization studies for cases where more conventional methods fail.
Book Synopsis Collaborative Multidisciplinary Design Optimization for Conceptual Design of Complex Products by : Edris Safavi
Download or read book Collaborative Multidisciplinary Design Optimization for Conceptual Design of Complex Products written by Edris Safavi and published by Linköping University Electronic Press. This book was released on 2016-10-06 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: MULTIDESCIPLINARY design optimization (MDO) has developed in theory andpractice during the last three decades with the aim of optimizing complexproducts as well as cutting costs and product development time. Despite thisdevelopment, the implementation of such a method in industry is still a challenge andmany complex products suffer time and cost overruns. Employing higher fidelity models (HFMs) in conceptual design, one of the early and most important phases in the design process, can play an important role in increasing the knowledge base regarding the concept under evaluation. However, design space in the presence of HFMs could significantly be expanded. MDO has proven to be an important tool for searching the design space and finding optimal solutions. This leads to a reduction in the number of design iterations later in the design process, with wiser and more robust decisions made early in the design process to rely on. In complex products, different systems from a multitude of engineering disciplines have to work tightly together. This stresses the importance of evolving various domain experts in the design process to improve the design from diverse engineering perspectives. Involving more engineers in the design process early on raises the challenges of collaboration, known to be an important barrier to MDO implementation in industry. Another barrier is the unavailability and lack of MDO experts in industry; those who understand the MDO process and know the implementation tasks involved. In an endeavor to address the mentioned implementation challenges, a novel collaborative multidisciplinary design optimization (CMDO) framework is defined in order to be applied in the conceptual design phase. CMDO provides a platform where many engineers team up to increase the likelihood of more accurate decisions being taken early on. The structured way to define the engineering responsibilities and tasks involved in MDO helps to facilitate the implementation process. It will be further elaborated that educating active engineers with MDO knowledge is an expensive and time-consuming process for industries. Therefore, a guideline for CMDO implementation in conceptual design is proposed in this thesis that can be easily followed by design engineers with limited prior knowledge in MDO. The performance of the framework is evaluated in a number of case studies, including applications such as aircraft design and the design of a tidal water power plant, and by engineers in industry and student groups in academia.
Book Synopsis Aircraft Conceptual Design by Collaborative Manual and Automatic Agents by : Kamran Eftekhari Shahroudi
Download or read book Aircraft Conceptual Design by Collaborative Manual and Automatic Agents written by Kamran Eftekhari Shahroudi and published by . This book was released on 1997 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In real applications, it is extremely difficult (if not impossible) to define function(s) that measure the 'true merit' of a design object. For example, even the most prominent aircraft designers would not dare to claim that a particular set of merit and constraint functions measures the 'true merit' of a class of aircraft. The traditional approach to set up a 'machine centric' optimization cannot effectively address this issue because there is no user interaction with the numerical optimization at design or run time. The semi-automatic concept, however, can help because the user is allowed to interact with the design problem and the design progress in-the-loop, such that the design criteria can be improved relatively easily at design time. This paper briefly describes the semi-automatic design optimization setup which was introduced in full detail in a previous paper by the author. A simple multidisciplinary aircraft conceptual design optimization problem is then specified based on Torenbeek (1992). Various modes of in-the-loop user control on the search progress and the search problem then illustrate the potential benefits of allowing the user to interact with a numerical agent at various levels of automation."
Book Synopsis Enhancing Aircraft Conceptual Design Using Multidisciplinary Optimization by : Daniel P. Raymer
Download or read book Enhancing Aircraft Conceptual Design Using Multidisciplinary Optimization written by Daniel P. Raymer and published by . This book was released on 2002 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerospace Vehicle Design with Bayesian Collaborative Optimization by : Jean de Becdelievre
Download or read book Aerospace Vehicle Design with Bayesian Collaborative Optimization written by Jean de Becdelievre and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex engineering design requires solving large optimization problems involving several disciplines. Collaborative Optimization is a two-level design optimization architecture that solves multidisciplinary problems as a series of single-disciplinary problems with little infrastructure overhead. It can be critical when practitioners do not have a fully coupled multidisciplinary optimizer but have access to multiple single-disciplinary optimizers. However, it comes at a steep computational cost because the limited information sharing between disciplines slows downs the progress of the optimization. Our work shows that this issue can be mitigated by exploiting the full extent of the available information. In the Collaborative Optimization framework, disciplines are repeatedly given a design point and tasked with finding the closest feasible design. These iterations are computationally expensive as they require each discipline to solve an optimization problem and report the result. To combine the information collected by all iterations, we propose to learn a predictive model of the distance to the feasible set of each discipline using datasets of feasible and infeasible design points. This requires modeling the signed distance function of each set, which is a challenging machine-learning task. Therefore, we introduce Householder networks: a new, lightweight neural network architecture that can learn distance functions more efficiently than conventional architectures. We then introduce our new method, called Bayesian Collaborative Optimization, which uses ensembles of Householder networks to represent probabilistic models of the disciplinary feasible sets. Following the Bayesian Optimization framework, these models are iteratively refined and used to find values of the design variables that improve the objective function while remaining feasible for every discipline. This method is shown to outperform previous Collaborative Optimization approaches on simple test problems. Finally, we introduce a new multi-disciplinary aircraft design problem. We optimize the airframe, propulsion system, and trajectory of an unmanned fixed-wing vehicle tasked with completing a half-marathon with a fixed battery. This problem tries to balance out realism, by including a diverse set of modeling and optimization approaches, with simplicity and low computational cost. The importance of trajectory optimization, which is efficiently solved by itself but hard to solve coupled with other disciplines, makes this problem different from those previously available. We hope that this problem will be useful to the research community as a test for multidisciplinary design optimization architectures. We have open-sourced the code that generated the results presented in this document. It can be accessed at the following links: https://github.com/jdebecdelievre/HouseholderNets.jl , https://github.com/jdebecdelievre/BayesianCollaborativeOptimizat ion.jl , and https://github.com/jdebecdelievre/ModelAirRaces.jl.
Book Synopsis Robust Coupled Optimization of Aircraft Family Design and Fleet Allocation for Multiple Markets by : Peter Jansen (W.)
Download or read book Robust Coupled Optimization of Aircraft Family Design and Fleet Allocation for Multiple Markets written by Peter Jansen (W.) and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Collaborative Multidisciplinary Design Optimization by :
Download or read book Collaborative Multidisciplinary Design Optimization written by and published by . This book was released on 2013 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Huuwlyks-zangen, ter bruilofte van den heere Albert van Heyningen, en jonkvrouw Sara ten Kate. Vereenigt den 17den van lentemaand, 1715 by :
Download or read book Huuwlyks-zangen, ter bruilofte van den heere Albert van Heyningen, en jonkvrouw Sara ten Kate. Vereenigt den 17den van lentemaand, 1715 written by and published by . This book was released on 1715 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Future of Airplane Factory by : George Nicholas Bullen
Download or read book Future of Airplane Factory written by George Nicholas Bullen and published by SAE International. This book was released on 2019-05-28 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Future of Airplane Factory: Digitally Optimized Intelligent Airplane Factory defines the architecture, key building blocks, and roadmap for actualizing a future airplane factory (FAF) that is digitally optimized for intelligent airplane assembly. They fit and integrate with other FAF building blocks that aggregate to a Digitally Optimized Intelligent Airplane Factory (DOIAF). The word "intelligent" refers to the ability of a system to make right decisions and take right action in the highly dynamic and fluid environment of the modern airplane manufacturing space. The event-driven dynamics inherent in the complexity of this environment drive the need for expert knowledge which resides in intelligence systems incorporating the experience of experts. Expert knowledge need not be smart, brilliant, or possess genius as long as the outcomes are derived from right decisions resulting in right actions-applied rapidly to sustain an optimized factory enterprise. Complete factory enterprise visibility requires a higher order of decision capability that current operating systems do not have. A highly visible factory collects and displays data and information as it happens-at a rate beyond the ability of humans and current systems to analyze, process, decide, and act upon. Expert systems are constructed to present humans with right decisions in the form of optimal choices for right actions by incorporating the knowledge of experts into the logic for the decision. Structured Knowledge-Based Expert Systems (SKBES) are incorporated in this book and defined as a critical component for full enterprise actionable visibility. The power of the Digitally Optimized Intelligent Airplane Factory not only is found in its ability to unify the factory, reduce touch labor, improve quality, and streamline throughput but it also enables a significant reduction in above-the-shop-floor support and management. Such an ecosystem frees the human to focus on the complexity of interpersonal responsibilities. If the use of a DOIAF can be viewed as a holistic mechanism, then the human can be the agent engaging with that mechanism; improving negotiations for pricing, contracts, or other person-to-person events that require instinct and relationship.
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Book Synopsis Robust Analysis and Optimization Process for Simulation-enhanced Design of Flexible Aircraft by : Marco Saporito
Download or read book Robust Analysis and Optimization Process for Simulation-enhanced Design of Flexible Aircraft written by Marco Saporito and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This note is part of Quality testing.
Book Synopsis MAKING THINGS BETTER COMPETING IN MANUFACTURING by :
Download or read book MAKING THINGS BETTER COMPETING IN MANUFACTURING written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Making things better : competing in manufacturing. by :
Download or read book Making things better : competing in manufacturing. written by and published by DIANE Publishing. This book was released on with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Book Synopsis Managing Aerospace Projects by : Jimmy Williams
Download or read book Managing Aerospace Projects written by Jimmy Williams and published by SAE International. This book was released on 2017-09-12 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the next twenty years, the role and contributions of successfully managed projects will continue to grow in importance to aerospace organizations, especially considering the demands of emerging markets. The accompanying challenges will be how to effectively reduce product and process cost where known (incremental) and unknown (transformational) technological innovation is required. Managing Aerospace Projects brings together ten seminal SAE technical papers that support the vision of a more holistic and integrated approach to highly complex projects. Using the concept of project management levers, Dr. Jimmy Williams, Jr., the editor of this title, expands on the critical importance of correctly deciding on •Organizational strategies •Technology and product strategy •Global portfolio strategy •Project portfolio strategy Sub-optimized strategies result in and contribute to a portfolio of misdirected projects and organizational dissatisfaction with project management outcomes unrelated to the actual project management process. As an example, ensuring the convergence and readiness of technologies that are critical for the design, development, and assembly of aircraft requires a disciplined and flexible approach for product and technology development. Operating in an environment in which customer needs and supplier capabilities are dynamic requires continual focus on a portfolio of projects, initiatives, and capabilities that result in sustaining competitive advantage and influence. Managing Aerospace Projects stresses the positive impact of project classification and the specific handling and leadership knowledge requirements so that these endeavors are indeed successful. Some comparisons and lessons from the automotive industry are offered. The notion that project management competence and capabilities are embedded in distinct ways of coordinating and combining multiple competencies suggests that failing to recognize the required organizational adaptations could be a major contributor to sub-optimized project management outcomes.