|
Showing 1 - 7 of
7 matches in All Departments
This book presents an innovative control system design process
motivated by renewable energy electric grid integration problems.
The concepts developed result from the convergence of research and
development goals which have important concepts in common: exergy
flow, limit cycles, and balance between competing power flows. A
unique set of criteria is proposed to design controllers for a
class of nonlinear systems. A combination of thermodynamics with
Hamiltonian systems provides the theoretical foundation which is
then realized in a series of connected case studies. It allows the
process of control design to be viewed as a power flow control
problem, balancing the power flowing into a system against that
being dissipated within it and dependent on the power being stored
in it - an interplay between kinetic and potential energies. Human
factors and the sustainability of self-organizing systems are dealt
with as advanced topics.
This book is the result of over ten (10) years of research and
development in flexible robots and structures at Sandia National
Laboratories. The authors de cided to collect this wealth of
knowledge into a set of viewgraphs in order to teach a graduate
class in Flexible Robot Dynamics and Controls within the Mechanical
En gineering Department at the University of New Mexico (UNM).
These viewgraphs, encouragement from several students, and many
late nights have produced a book that should provide an upper-level
undergraduate and graduate textbook and a reference for experienced
professionals. The content of this book spans several disciplines
including structural dynam ics, system identification,
optimization, and linear, digital, and nonlinear control theory
which are developed from several points of view including
electrical, me chanical, and aerospace engineering as well as
engineering mechanics. As a result, the authors believe that this
book demonstrates the value of solid applied theory when developing
hardware solutions to real world problems. The reader will find
many real world applications in this book and will be shown the
applicability of these techniques beyond flexible structures which,
in turn, shows the value of mul tidisciplinary education and
teaming.
Regenerative gas turbines are attractive alternatives to diesel
engines and spark ignition engines for automobiles and to diesel
engines and combined-cycle en gines for power generation. Theory
indicates regenerative gas turbines should achieve higher thermal
efficiencies than those of diesel engines and combined cycle
engines. Further, regenerative gas turbines are potentially lower
in cost, require less maintenance, require less space, and pollute
less than competitive systems. Regenerators can be used for
exhaust-gas heat exchange or for intercooling in gas-turbine
systems. As an exhaust-gas heat exchanger, a regenerator recovers
heat from the exhaust and uses it to preheat the compressed air
before the compressed air enters the combustor. Preheating of the
compressed air permits a small heat input to the combustor for a
given power output of the engine. As an intercooler, a regenerator
cools the gas between compressor stages. Less work is required to
compress cool gas than is required to compress warm gas. Therefore,
a regenerator intercooler can reduce the required work input to the
compressor. Thus, regenerators can be used to increase the thermal
efficiencies and power outputs of gas turbines. the backbones of
high-performance re High-performance regenerators are generative
gas turbines. In the past, lack of understanding of regenerator per
formance has led to sub-optimal engine designs. Now this book gives
com prehensive regenerator information. With this book, the
designer can design regenerators that will yield gas turbines with
maximum thermal efficiencies."
This book is the result of over ten (10) years of research and
development in flexible robots and structures at Sandia National
Laboratories. The authors de cided to collect this wealth of
knowledge into a set of viewgraphs in order to teach a graduate
class in Flexible Robot Dynamics and Controls within the Mechanical
En gineering Department at the University of New Mexico (UNM).
These viewgraphs, encouragement from several students, and many
late nights have produced a book that should provide an upper-level
undergraduate and graduate textbook and a reference for experienced
professionals. The content of this book spans several disciplines
including structural dynam ics, system identification,
optimization, and linear, digital, and nonlinear control theory
which are developed from several points of view including
electrical, me chanical, and aerospace engineering as well as
engineering mechanics. As a result, the authors believe that this
book demonstrates the value of solid applied theory when developing
hardware solutions to real world problems. The reader will find
many real world applications in this book and will be shown the
applicability of these techniques beyond flexible structures which,
in turn, shows the value of mul tidisciplinary education and
teaming."
Gas-Turbine Regenerators begins with a thorough introduction to
regenerators, familiarizing the reader with the terminology used in
regenerator analysis and design. The book then describes the
historical background of regenerator analysis and design and their
development through the years. Following the historical background,
this book explores gas-turbine cycles, the thermodynamic cycle by
which gas turbines convert heat into work. The book then presents
three design models: Direct Regenerator Design; Optimal Regenerator
Design, and the design methods of Kays and London. The text
concludes with three significant kinds of regenerator performance:
heat transfer; leakage, and pressure drops. Regenerative gas
turbines have the potential to be more efficient and lower in cost
than competing diesel and combined cycle engines. In addition,
regenerative gas turbines require less maintenance, require less
space, and pollute less than competitive systems. This text
provides engineers and designers with the tools needed to achieve
these qualities in four distinct ways: First, in the preliminary
stages, designers can choose from one or more designs that may be
suitable for their application. Second, the designer who has some
design specifications can use the optimization method to choose the
remaining specifications in order to provide maximum thermal
efficiency. Third, this book can be used by the manufacturer of
regenerator cores in selecting core-passage geometrics and core
materials. Finally, inexperienced designers can use the
step-by-step examples of designs of regenerative gas turbines.
This book presents an innovative control system design process
motivated by renewable energy electric grid integration problems.
The concepts developed result from the convergence of research and
development goals which have important concepts in common: exergy
flow, limit cycles, and balance between competing power flows. A
unique set of criteria is proposed to design controllers for a
class of nonlinear systems. A combination of thermodynamics with
Hamiltonian systems provides the theoretical foundation which is
then realized in a series of connected case studies. It allows the
process of control design to be viewed as a power flow control
problem, balancing the power flowing into a system against that
being dissipated within it and dependent on the power being stored
in it - an interplay between kinetic and potential energies. Human
factors and the sustainability of self-organizing systems are dealt
with as advanced topics.
Based on the results of over 10 years of research and development
by the authors, this book presents a broad cross section of dynamic
programming (DP) techniques applied to the optimization of
dynamical systems. The main goal of the research effort was to
develop a robust path planning/trajectory optimization tool that
did not require an initial guess. The goal was partially met with a
combination of DP and homotopy algorithms. DP algorithms are
presented here with a theoretical development, and their successful
application to variety of practical engineering problems is
emphasized. Applied Dynamic Programming for Optimization of
Dynamical Systems presents applications of DP algorithms that are
easily adapted to the reader's own interests and problems. The book
is organized in such a way that it is possible for readers to use
DP algorithms before thoroughly comprehending the full theoretical
development. A general architecture is introduced for DP algorithms
emphasizing the solution to nonlinear problems. DP algorithm
development is introduced gradually with illustrative examples that
surround linear systems applications. Many examples and explicit
design steps applied to case studies illustrate the ideas and
principles behind DP algorithms. DP algorithms potentially address
a wide class of applications composed of many different physical
systems described by dynamical equations of motion that require
optimized trajectories for effective maneuverability. The DP
algorithms determine control inputs and corresponding state
histories of dynamic systems for a specified time while minimizing
a performance index. Constraints may be applied to the final states
of the dynamic system or to the states and control inputs during
the transient portion of the manoeuvre.
|
You may like...
Loot
Nadine Gordimer
Paperback
(2)
R398
R330
Discovery Miles 3 300
The Creator
John David Washington, Gemma Chan, …
DVD
R325
Discovery Miles 3 250
Loot
Nadine Gordimer
Paperback
(2)
R398
R330
Discovery Miles 3 300
Loot
Nadine Gordimer
Paperback
(2)
R398
R330
Discovery Miles 3 300
|