Control of Over-actuated Systems with Application to Advanced Turbocharged Diesel Engines PDF Download
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Author: Junqiang Zhou Publisher: ISBN: Category : Languages : en Pages : 190
Book Description
The automotive industry is currently striving to improve vehicle fuel economy, while complying to stringent emission standards and keeping affordable costs. Engine downsizing with advanced turbochargers is one of the main technical solutions nowadays implemented by the industry in response to the above challenges. In particular, the adoption of advanced actuation techniques brings more degrees of freedom to improve the efficiency of breathing and combustion in internal combustion engines. However, it is understood that improvements in engine design can be effective only if matched by the ability to closely control engine breathing and combustion performance. This dissertation aims at exploiting systematic methodologies for control and optimization of over-actuated systems. Following the path of the state of the art in control theory and practice, a novel control design methodology is proposed that hinges on the characterization of redundancy for a class of over-actuated systems in geometric terms to determine the reconfigurable structure of the controller. The method relies upon the concept of inverse model allocation, where the integration of allocation module is effectively separated from stabilization of the regulated outputs, allowing one to shape the transient response by optimizing on-line a given cost function without affecting the output tracking performance. The proposed approach overcomes fundamental limitations found in current techniques and specifically addresses the need for simultaneous control and optimization of the air-path systems for advanced downsized engines. The proposed control methodology is applied to the case study of a Diesel engine air-path system equipped with Variable Geometry Turbine (VGT), Variable Geometry Compressor (VGC) and Exhaust Gas Recirculation (EGR) systems. A comparative study against different conventional control methods shows the effectiveness of the proposed methodology to improve the engine performance variables, as well as the overall reduction in design and calibration costs.
Author: Junqiang Zhou Publisher: ISBN: Category : Languages : en Pages : 190
Book Description
The automotive industry is currently striving to improve vehicle fuel economy, while complying to stringent emission standards and keeping affordable costs. Engine downsizing with advanced turbochargers is one of the main technical solutions nowadays implemented by the industry in response to the above challenges. In particular, the adoption of advanced actuation techniques brings more degrees of freedom to improve the efficiency of breathing and combustion in internal combustion engines. However, it is understood that improvements in engine design can be effective only if matched by the ability to closely control engine breathing and combustion performance. This dissertation aims at exploiting systematic methodologies for control and optimization of over-actuated systems. Following the path of the state of the art in control theory and practice, a novel control design methodology is proposed that hinges on the characterization of redundancy for a class of over-actuated systems in geometric terms to determine the reconfigurable structure of the controller. The method relies upon the concept of inverse model allocation, where the integration of allocation module is effectively separated from stabilization of the regulated outputs, allowing one to shape the transient response by optimizing on-line a given cost function without affecting the output tracking performance. The proposed approach overcomes fundamental limitations found in current techniques and specifically addresses the need for simultaneous control and optimization of the air-path systems for advanced downsized engines. The proposed control methodology is applied to the case study of a Diesel engine air-path system equipped with Variable Geometry Turbine (VGT), Variable Geometry Compressor (VGC) and Exhaust Gas Recirculation (EGR) systems. A comparative study against different conventional control methods shows the effectiveness of the proposed methodology to improve the engine performance variables, as well as the overall reduction in design and calibration costs.
Author: Michael J. Grimble Publisher: Springer Nature ISBN: 1447174577 Category : Technology & Engineering Languages : en Pages : 778
Book Description
Nonlinear Industrial Control Systems presents a range of mostly optimisation-based methods for severely nonlinear systems; it discusses feedforward and feedback control and tracking control systems design. The plant models and design algorithms are provided in a MATLAB® toolbox that enable both academic examples and industrial application studies to be repeated and evaluated, taking into account practical application and implementation problems. The text makes nonlinear control theory accessible to readers having only a background in linear systems, and concentrates on real applications of nonlinear control. It covers: different ways of modelling nonlinear systems including state space, polynomial-based, linear parameter varying, state-dependent and hybrid; design techniques for nonlinear optimal control including generalised-minimum-variance, model predictive control, quadratic-Gaussian, factorised and H∞ design methods; design philosophies that are suitable for aerospace, automotive, marine, process-control, energy systems, robotics, servo systems and manufacturing; steps in design procedures that are illustrated in design studies to define cost-functions and cope with problems such as disturbance rejection, uncertainties and integral wind-up; and baseline non-optimal control techniques such as nonlinear Smith predictors, feedback linearization, sliding mode control and nonlinear PID. Nonlinear Industrial Control Systems is valuable to engineers in industry dealing with actual nonlinear systems. It provides students with a comprehensive range of techniques and examples for solving real nonlinear control design problems.
Author: National Research Council Publisher: National Academies Press ISBN: 0309216389 Category : Science Languages : en Pages : 373
Book Description
Various combinations of commercially available technologies could greatly reduce fuel consumption in passenger cars, sport-utility vehicles, minivans, and other light-duty vehicles without compromising vehicle performance or safety. Assessment of Technologies for Improving Light Duty Vehicle Fuel Economy estimates the potential fuel savings and costs to consumers of available technology combinations for three types of engines: spark-ignition gasoline, compression-ignition diesel, and hybrid. According to its estimates, adopting the full combination of improved technologies in medium and large cars and pickup trucks with spark-ignition engines could reduce fuel consumption by 29 percent at an additional cost of $2,200 to the consumer. Replacing spark-ignition engines with diesel engines and components would yield fuel savings of about 37 percent at an added cost of approximately $5,900 per vehicle, and replacing spark-ignition engines with hybrid engines and components would reduce fuel consumption by 43 percent at an increase of $6,000 per vehicle. The book focuses on fuel consumption-the amount of fuel consumed in a given driving distance-because energy savings are directly related to the amount of fuel used. In contrast, fuel economy measures how far a vehicle will travel with a gallon of fuel. Because fuel consumption data indicate money saved on fuel purchases and reductions in carbon dioxide emissions, the book finds that vehicle stickers should provide consumers with fuel consumption data in addition to fuel economy information.
Author: H Zhao Publisher: Elsevier ISBN: 1845697456 Category : Technology & Engineering Languages : en Pages : 761
Book Description
Volume 2 of the two-volume set Advanced direct injection combustion engine technologies and development investigates diesel DI combustion engines, which despite their commercial success are facing ever more stringent emission legislation worldwide. Direct injection diesel engines are generally more efficient and cleaner than indirect injection engines and as fuel prices continue to rise DI engines are expected to gain in popularity for automotive applications. Two exclusive sections examine light-duty and heavy-duty diesel engines. Fuel injection systems and after treatment systems for DI diesel engines are discussed. The final section addresses exhaust emission control strategies, including combustion diagnostics and modelling, drawing on reputable diesel combustion system research and development. Investigates how HSDI and DI engines can meet ever more stringent emission legislation Examines technologies for both light-duty and heavy-duty diesel engines Discusses exhaust emission control strategies, combustion diagnostics and modelling
Author: Erwin Meier (Writer in diesel engines) Publisher: ISBN: Category : Compressors Languages : en Pages : 0
Book Description
The turbocharging systems of highly boosted four-stroke diesel engines (BMEP 25 bar/363 psi) have to cope with two basic problems: lack of air and compressor surge at reduced engine speed. In the case of medium speed engines for ship propulsion and stationary applications, the following three control interventions have proved to be successful solutions: (1) waste gating air or exhaust gas at full load and speed, (2) using a compounded or independent exhaust gas driven power turbine that can be shut off at part load and speed, and (3) blowing air from the compressor outlet to the turbine inlet through a controlled bypass. The effect of these control interventions on engine performance is shown by examples and analyzed by means of characteristic quantities for the efficiency of the turbocharging system and the engine. The definitions and meanings of these quantities are explained in the first part of the paper.
Author: National Research Council Publisher: National Academies Press ISBN: 0309373913 Category : Science Languages : en Pages : 812
Book Description
The light-duty vehicle fleet is expected to undergo substantial technological changes over the next several decades. New powertrain designs, alternative fuels, advanced materials and significant changes to the vehicle body are being driven by increasingly stringent fuel economy and greenhouse gas emission standards. By the end of the next decade, cars and light-duty trucks will be more fuel efficient, weigh less, emit less air pollutants, have more safety features, and will be more expensive to purchase relative to current vehicles. Though the gasoline-powered spark ignition engine will continue to be the dominant powertrain configuration even through 2030, such vehicles will be equipped with advanced technologies, materials, electronics and controls, and aerodynamics. And by 2030, the deployment of alternative methods to propel and fuel vehicles and alternative modes of transportation, including autonomous vehicles, will be well underway. What are these new technologies - how will they work, and will some technologies be more effective than others? Written to inform The United States Department of Transportation's National Highway Traffic Safety Administration (NHTSA) and Environmental Protection Agency (EPA) Corporate Average Fuel Economy (CAFE) and greenhouse gas (GHG) emission standards, this new report from the National Research Council is a technical evaluation of costs, benefits, and implementation issues of fuel reduction technologies for next-generation light-duty vehicles. Cost, Effectiveness, and Deployment of Fuel Economy Technologies for Light-Duty Vehicles estimates the cost, potential efficiency improvements, and barriers to commercial deployment of technologies that might be employed from 2020 to 2030. This report describes these promising technologies and makes recommendations for their inclusion on the list of technologies applicable for the 2017-2025 CAFE standards.
Author: Dipankar Deb Publisher: Springer Nature ISBN: 9811641617 Category : Technology & Engineering Languages : en Pages : 129
Book Description
This book provides a basic understanding of adaptive control and its applications in Flight control. It discusses the designing of an adaptive feedback control system and analyzes this for flight control of linear and nonlinear aircraft models using synthetic jet actuators. It also discusses control methodologies and the application of control techniques which will help practicing flight control and active flow control researchers. It also covers modelling and control designs which will also benefit researchers from the background of fluid mechanics and health management of actuation systems. The unique feature of this book is characterization of synthetic jet actuator nonlinearities over a wide range of angles of attack, an adaptive compensation scheme for such nonlinearities, and a systematic framework for feedback control of aircraft dynamics with synthetic jet actuators.
Author: Gus Wright Publisher: Jones & Bartlett Learning ISBN: 1284150917 Category : Transportation Languages : en Pages : 1895
Book Description
"Fundamentals of Medium/Heavy Duty Diesel Engines, Second Edition offers comprehensive coverage of every ASE task with clarity and precision in a concise format that ensures student comprehension and encourages critical thinking. This edition describes safe and effective diagnostic, repair, and maintenance procedures for today's medium and heavy vehicle diesel engines"--
Author: Gang Tao Publisher: Springer Science & Business Media ISBN: 9781852337889 Category : Science Languages : en Pages : 324
Book Description
This book shows readers new ways to compensate for disturbances in control systems prolonging the intervals between time-consuming and/or expensive fault diagnosis procedures, keeping them up to date in the increasingly important field of adaptive control.
Author: Junqiang Zhou
Author: Junqiang Zhou
Author: Michael J. Grimble
Author: National Research Council
Author: H Zhao
Author: Erwin Meier (Writer in diesel engines)
Author: National Research Council
Author: Dipankar Deb
Author: Gus Wright
Author: 
Author: Gang Tao