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Optimization of Adaptive Test Design Methods for the Determination of Steady-State Data-Driven Models in Terms of Combustion Engine Calibration
This thesis deals with the development of a model-based adaptive test design strategy with a focus on steady-state combustion engine calibration. The first research topic investigates the question how to handle limits in the input domain during an adaptive test design procedure. The second area of scope aims at identifying the test design method providing the best model quality improvement in terms of overall model prediction error.To consider restricted areas in the input domain, a convex hull-based solution involving a convex cone algorithm is developed, the outcome of which serves as a boundary model for a test point search. A solution is derived to enable the application of the boundary model to high-dimensional problems without calculating the exact convex hull and cones. Furthermore, different data-driven engine modeling methods are compared, resulting in the Gaussian process model as the most suitable one for a model-based calibration. To determine an appropriate test design method for a Gaussian process model application, two new strategies are developed and compared to state-of-the-art methods. A simulation-based study shows the most benefit applying a modified mutual information test design, followed by a newly developed relevance-based test design with less computational effort. The boundary model and the relevance-based test design are integrated into a multicriterial test design strategy that is tailored to match the requirements of combustion engine test bench measurements. A simulation-based study with seven and nine input parameters and four outputs each offered an average model quality improvement of 36 % and an average measured input area volume increase of 65 % compared to a non-adaptive space-filling test design. The multicriterial test design was applied to a test bench measurement with seven inputs for verification. Compared to a space-filling test design measurement, the improvement could be confirmed with an average model quality increase of 17 % over eight outputs and a 34 % larger measured input area.
Dissertation
Power Electronics for Renewable Energy Systems, Transportation and Industrial Applications
<p><i>Power Electronics for Renewable Energy, Transportation, and Industrial Applications</i> combines state-of-the-art global expertise to present the latest research on power electronics and its application in transportation, renewable energy, and different industrial applications. This timely book aims to facilitate the implementation of cutting-edge techniques to design problems offering innovative solutions to the growing power demands in small- and large-size industries.  Application areas in the book range from smart homes and  electric and plug-in hybrid electrical vehicles (PHEVs), to smart distribution and intelligence operation centers where significant energy efficiency improvements can be achieved through the appropriate use and design of power electronics and energy storage devices. </p> <p>Key features: </p> <ul> <li>Discusses wide range of power electronics converters and control techniques to reduce energy waste and improve grid power quality.</li> <li>Brings together power electronics technologies such as renewable energy conversion, electric transportation, and electric drives, which are prevalent in industry and at education and research stages.</li> <li>Defines existing challenges, concerns, and selected problems complying with international trends, standards, and programs for electric power conversion, distribution, and sustainable energy development. </li> <li>An imperative and far reaching learning resource for power electronics engineers, researchers, and students.</li> </ul>
eBook
Technological internationalism and world order : aviation, atomic energy, and the search for international peace, 1920-1950
\"Between 1920 and 1950, British and US internationalists called for aviation and atomic energy to be taken out of the hands of nation-states, and instead used by international organizations such as the League of Nations and the United Nations. An international air force was to enforce collective security and internationalized civil aviation was to bind the world together through trade and communication. The bomber and the atomic bomb, now associated with death and devastation, were to be instruments of world peace. Drawing on rich archival research and focusing on public and private discourse relating to the control of aviation and atomic energy, Waqar H. Zaidi highlights neglected technological and militaristic strands in twentieth-century liberal internationalism, and transforms our understanding of the place of science and technology in twentieth-century international relations\"-- Provided by publisher.
Book
General Aviation Aircraft Design - Applied Methods and Procedures
Find the right answer the first time with this useful handbook of preliminary aircraft design. Written by an engineer with close to 20 years of design experience, this book provides the practicing engineer with a versatile handbook that serves as the first source for finding answers to realistic aircraft design questions. The book is structured in an \"equation/derivation/solved example\" format for easy access to content. Readers will find it a valuable guide to topics such as sizing of horizontal and vertical tails to minimize drag, sizing of lifting surfaces to ensure proper dynamic stability, numerical performance methods, and common faults and fixes in aircraft design. In most cases, numerical examples involve actual aircraft specs. Concepts are visually depicted by a number of useful black-and-white figures, photos, and graphs (with full-color images included in the eBook only). Broad and deep in coverage, it is intended for practicing engineers, aerospace engineering students, mathematically astute amateur aircraft designers, and anyone interested in aircraft design.
eBook
Predictive Control of Power Converters and Electrical Drives
<p>The application Model Predictive Control (MPC) controls electrical energy with the use of power converters and offers a highly flexible alternative to the use of modulators and linear controllers. This new approach takes into account the discrete and nonlinear nature of the power converters and drives and promises to have a strong impact on control in power electronics in the coming decades.</p> <p><i>Predictive Control of Power Converters and Electrical Drives</i> provides a comprehensive overview of the general principles and current research into MPC and is ideal for engineers, specialists and researchers needing: </p> <ul> <li>a straightforward explanation of the theory and implementation of predictive control;</li> <li>analysis on classical converter control methods and electrical drives control methods;</li> <li>application examples and case studies demonstrating how control schemes have been implemented;</li> <li>practice in running their own MATLAB<sup>(R)</sup> simulations through the companion website.</li> </ul> <p>With the information provided, power electronics specialists will be able to start applying this new control technique. This book will help electrical, electronics and control engineers, R&D engineers, product development engineers working in power electronics and drives, and industry engineers of power conversions and motor drives. It is also a complete reference for university researchers, graduate and senior-level undergraduate students of electrical and electronics engineering, academic control specialists, and academics in electrical drives.</p> <p>URL: www.wiley.com/go/rodriguez_control</p>
eBook
Large Energy Storage Systems Handbook
Reviewing several ways in which large amounts of energy can be stored so that it may be deployable by utilities, this handbook covers major topics including pumped hydroelectric systems, compressed air, and batteries. By considering the perspective of developers, planners, and legislators as well as engineers tasked with assessing and developing real energy storage systems, readers will find the information they need to make economic and practical decisions concerning renewable energy. Chapters on modeling for integration of wind and solar energy into the grid, hydrogen generation and storage, and thermal energy storage are included.
eBook
Adsorption Refrigeration Technology
\"Gives readers a detailed understanding of adsorption refrigeration technology, with a focus on practical applications and environmental concerns. Systematically covering the technology of adsorption refrigeration, this book provides readers with a technical understanding of the topic as well as detailed information on the state-of-the-art from leading researchers in the field. Introducing readers to background on the development of adsorption refrigeration, the authors also cover the development of adsorbents, various thermodynamic theories, the design of adsorption systems and adsorption refrigeration cycles. The book guides readers through the research process, covering key aspects such as: the principle of adsorption refrigeration; choosing adsorbents according to different characteristics; thermodynamic equations; methods for the design of heat exchangers for adsorbers; and the advanced adsorption cycles needed. It is also valuable as a reference for professionals working in these areas. Covers state-of-the art of adsorption research and technologies for relevant applications, working from adsorption working pairs through to the application of adsorption refrigeration technology for low grade heat recovery. Assesses sustainable alternatives to traditional refrigeration methods, such as the application of adsorption refrigeration systems for solar energy and waste heat Includes a key chapter on the design of adsorption refrigeration systems as a tutorial for readers new to the topic; the calculation models for different components and working processes are also included. Takes real-world examples giving an insight into existing products and installations and enabling readers to apply the knowledge to their own work. Target audience: Academics researching low grade energy utilization and refrigeration; Graduate students of refrigeration and low grade energy utilization; Experienced engineers wanting to renew knowledge of adsorption technology; Engineers working at companies developing adsorption chillers; Graduate students working on thermally driven systems; Advanced undergraduates for the Refrigeration Principle as a part of thermal driven refrigeration technology\"--
eBook