Test Platform for Advanced Digital Control of Brushless DC Motors (Msfc Center Director's Discretionary Fund) PDF Download
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721014149
Category :
Languages : en
Pages : 30
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Book Description
A FY 2001 Center Director's Discretionary Fund task to develop a test platform for the development, implementation. and evaluation of adaptive and other advanced control techniques for brushless DC (BLDC) motor-driven mechanisms is described. Important applications for BLDC motor-driven mechanisms are the translation of specimens in microgravity experiments and electromechanical actuation of nozzle and fuel valves in propulsion systems. Motor-driven aerocontrol surfaces are also being utilized in developmental X vehicles. The experimental test platform employs a linear translation stage that is mounted vertically and driven by a BLDC motor. Control approaches are implemented on a digital signal processor-based controller for real-time, closed-loop control of the stage carriage position. The goal of the effort is to explore the application of advanced control approaches that can enhance the performance of a motor-driven actuator over the performance obtained using linear control approaches with fixed gains. Adaptive controllers utilizing an exact model knowledge controller and a self-tuning controller are implemented and the control system performance is illustrated through the presentation of experimental results.Gwaltney, D. A.Marshall Space Flight CenterDIGITAL SYSTEMS; CONTROL SYSTEMS DESIGN; ADAPTIVE CONTROL; ELECTRIC MOTORS; ACTUATORS; PROPORTIONAL CONTROL; MATHEMATICAL MODELS; FEEDBACK CONTROL; REAL TIME OPERATION; ELECTROMECHANICAL DEVICES; PROPULSION SYSTEM PERFORMANCE; LINEARITY; FUEL VALVES
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721014149
Category :
Languages : en
Pages : 30
Get Book Here
Book Description
A FY 2001 Center Director's Discretionary Fund task to develop a test platform for the development, implementation. and evaluation of adaptive and other advanced control techniques for brushless DC (BLDC) motor-driven mechanisms is described. Important applications for BLDC motor-driven mechanisms are the translation of specimens in microgravity experiments and electromechanical actuation of nozzle and fuel valves in propulsion systems. Motor-driven aerocontrol surfaces are also being utilized in developmental X vehicles. The experimental test platform employs a linear translation stage that is mounted vertically and driven by a BLDC motor. Control approaches are implemented on a digital signal processor-based controller for real-time, closed-loop control of the stage carriage position. The goal of the effort is to explore the application of advanced control approaches that can enhance the performance of a motor-driven actuator over the performance obtained using linear control approaches with fixed gains. Adaptive controllers utilizing an exact model knowledge controller and a self-tuning controller are implemented and the control system performance is illustrated through the presentation of experimental results.Gwaltney, D. A.Marshall Space Flight CenterDIGITAL SYSTEMS; CONTROL SYSTEMS DESIGN; ADAPTIVE CONTROL; ELECTRIC MOTORS; ACTUATORS; PROPORTIONAL CONTROL; MATHEMATICAL MODELS; FEEDBACK CONTROL; REAL TIME OPERATION; ELECTROMECHANICAL DEVICES; PROPULSION SYSTEM PERFORMANCE; LINEARITY; FUEL VALVES
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 948
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 936
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Book Description
Author: Manfred “Dutch” von Ehrenfried
Publisher: Springer Nature
ISBN: 3030681300
Category : Science
Languages : en
Pages : 378
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Book Description
Stratospheric balloons are powerful tools used to study the Earth and its atmosphere, as well as the greater cosmos beyond. This book describes the science and technology behind modern stratospheric ballooning, along with the surprising ways it has impacted our daily lives. The book takes you through every step of the process, starting with an in-depth introduction to basic balloon types and their uses before delving into balloon construction and mission planning. Along the way, you will learn about the novel technologies that have radically changed these balloons and their ability to launch, control and navigate them over specific ground targets. Next follows an exploration of their incredible applications, including research in atmospheric science, cosmology and astronomy, earth studies, meteorology, and aerobiology, and also commercial capabilities such as Internet networks and high-altitude tourism. The community of scientists, engineers, and entrepreneurs involved in stratospheric ballooning is only ever growing. This book shows you how these national and international efforts have truly soared in recent years, and it will be an enjoyable read for anybody interested in learning more about how science and commerce are conducted in the stratosphere, at the edge of space.
Author: Stephanie Torta
Publisher:
ISBN: 9781683922094
Category : Architecture
Languages : en
Pages : 250
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Book Description
This book is designed as an overview of the technology, applications, and design issues associated with the new 3D printing technology. It will be divided into three parts. Part 1 will cover a brief background of the history and evolution of 3D printing, along with their use in industry and personal consumer end. Part 2 will document three different projects from start to finish. This will show a variety of printers and what is needed before a project starts, as well as some of the pitfalls to watch out for when creating 3D prints. Part 3 will be a look ahead to how 3D printing will continue to evolve and how 3D printing is already in our pop-culture. Companion files are included with applications and examples of 3D printing. Features: * Provides an overview of the technology, applications, and design issues associated with the new 3D printing technology * Includes review questions, discussion / essay questions and "Applying What You've Learned" in every chapter * Companion files are included with projects, images, and samples of 3D printing
Author:
Publisher: CUP Archive
ISBN:
Category :
Languages : en
Pages : 188
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Author: Xinbo Ruan
Publisher: John Wiley & Sons
ISBN: 1118702239
Category : Technology & Engineering
Languages : en
Pages : 281
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Book Description
Soft-switching PWM full-bridge converters have been widely used in medium-to-high power DC-DC conversions for topological simplicity, easy control and high effi ciency. Early works on soft-switching PWM full-bridge converter by many researchers included various topologies and modulation strategies. However, these works were scattered, and the relationship among these topologies and modulation strategies had not been revealed. This book intends to describe systematically the soft-switching techniques for pulse-width modulation (PWM) full-bridge converters, including the topologies, control and design, and it reveals the relationship among the various topologies and PWM strategies previously proposed by other researchers. The book not only presents theoretical analysis, but also gives many detailed design examples of the converters. Describes the soft-switching techniques for pulse-width modulation (PWM) full-bridge converters systematically Covers topologies, control and design, from the basics, through to applications and development Deliberates the soft-switching PMW control technique rather than the standard PWM control technique Presents detailed theoretical analysis with design examples for various possible variations to the full-bridge topology using the soft-switching technique Soft-Switching PWM Full-Bridge Converters: Topologies, Control, and Design is an essential and valuable reference for graduate students and academics majoring in power electronics and power supply design engineers. Senior undergraduate students majoring in electrical engineering and automation engineering would also fi nd this book useful.
Author: P. Aarne Vesilind
Publisher: DEStech Publications, Inc
ISBN: 9781932078398
Category : Nature
Languages : en
Pages : 442
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Book Description
New introductory textbook designed for a one-semester course in environmental technology. Created to appeal to a range of students, it combines lucid presentations of environmental technologies with fascinating stories and biographies illustrating milestones in environmental science and engineering.
Author: Robert Kraus Jr.
Publisher: Oxford University Press
ISBN: 0199796513
Category : Medical
Languages : en
Pages : 266
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Book Description
This book is designed to introduce the reader to the field of NMR/MRI at very low magnetic fields, from milli-Tesla to micro-Tesla, the ultra-low field (ULF) regime. The book is focused on applications to imaging the human brain, and hardware methods primarily based upon pre-polarization methods and SQUID-based detection. The goal of the text is to provide insight and tools for the reader to better understand what applications are best served by ULF NMR/MRI approaches. A discussion of the hardware challenges, such as shielding, operation of SQUID sensors in a dynamic field environment, and pulsed magnetic field generation are presented. One goal of the text is to provide the reader a framework of understanding the approaches to estimation and mitigation of low signal-to-noise and long imaging time, which are the main challenges. Special attention is paid to the combination of MEG and ULF MRI, and the benefits and challenges presented by trying to accomplish both with the same hardware. The book discusses the origin of unique relaxation contrast at ULF, and special considerations for image artifacts and how to correct them (i.e. concomitant gradients, ghost artifacts). A general discussion of MRI, with special consideration to the challenges of imaging at ULF and unique opportunities in pulse sequences, is presented. The book also presents an overview of some of the primary applications of ULF NMR/MRI being pursued.
