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86
times
Machinery Repairman
precision lathe that is universally used in the machine shops of ships in the Navy. Repair ships also carry other types. A short description of some other ...Machine Repair U.S. Government Book. 436 pages
File size: 3 MB
File type: pdf
Last download: Thu May 10, 2012 01:51:10 PM
73
timesIntroduction to Control of Machines
switched ON through their main contacts, led to the much desired control of machines possible. The word control means to govern or regulate. ...
File size: 520.96 KB
File type: pdf
Last download: Tue May 15, 2012 08:04:49 PM
72
timesWorking with Machine and Control Definitions
first part of this document gives an overview of machine and ... copy of the machine definition and its control definition in your part file, as part of ...
File size: 3.19 MB
File type: pdf
Last download: Mon Mar 26, 2012 07:42:20 PM
185
timesElectric Machines and Drives
Electric Machines and Drives, The subject of this book is an important and diverse field of electric machines and drives. The twelve chapters of the book written by renowned authors, both academics and practitioners, cover a large part of the field of electric machines and drives. Various types of electric machines, including three-phase and single-phase induction machines or doubly fed machines, are addressed. Most of the chapters focus on modern control methods of induction-machine drives, such as vector and direct torque control. Among others, the book addresses sensorless control techniques, modulation strategies, parameter identification, artificial intelligence, operation under harsh or failure conditions, and modelling of electric or magnetic quantities in electric machines. Several chapters give an insight into the problem of minimizing losses in electric machines and increasing the overall energy efficiency of electric drives.
File size: 13.5 MB
File type: pdf
Last download: Fri May 04, 2012 09:17:02 PM
39
timesENGINE SPEED CONTROL
This is one of a series of white papers on systems modelling, analysis and
control, prepared by Control Systems Principles.co.uk to give insights into important
principles and processes in control.
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File type: pdf
Last download: Tue May 15, 2012 08:07:29 PM
40
timesinternal combustion engine efficiency
Power and efficiency limits for internal combustion engines via methods
of finite-time thermodynamics, I. INTRODUCTION
“In selecting an idealized process one is always faced
with the fact that the simpler the assumptions, the easier
the analysis, but the farther the result from reality” (Ref.
1, p. 23). The more assumptions we make, the farther we
are likely to be from reality. On the other hand, detailed,
realistic models for internal combustion engines are difficult
and expensive to compute and analyze.2 If we are
interested in maximum power output or in maximum efficiency
of internal combustion engines two ways of approaching
the problem are possible. We could incorporate
the major loss terms such as friction loss, heat leak, and
incomplete combustion in a simple model based on airstandard
cycle with rate-dependent loss mechanisms. Then
using optimal control theory we can compute the piston
trajectory which yields maximum power output. This approach
has been realized in Refs. 3 and 4 and it is an
application of the methods of finite-time thermodynamics.
Another approach is to use a more detailed, “realistic”
model and try only to fmd approximate upper limits for
possible performance rather than to determine directly the
optimum trajectory which yields the best performance.
This approach has been realized in Ref. 5 and it is also an
application of the methods of finite-time thermodynamics.
File size: 656.62 KB
File type: pdf
Last download: Sat Mar 03, 2012 02:39:39 PM
27
timesMachine Management System Tools and A Life Cycle Cost Calculation
A Life Cycle Cost Calculation and Management System for Machine Tools, Abstract
A life cycle cost calculation and management program for machine tools is presented here. Its aims are: to
provide life cycle cost data prediction at the offer phase and to support design phase decisions by
managing real machine tool behaviour data. The system is being tested in various types of machine tools
such as machining centres, transfer lines and grinding machines. It comprises four main areas : cost model
design, cost concept and basic data definition, product model design and instance cost calculation. It also
allows for generating customer defined outputs in various formats and integration with commercial reliability
analysis packages
File size: 338.31 KB
File type: pdf
Last download: Sat Apr 28, 2012 08:54:48 PM
21
timesConceptual Machine Design and Mechanical Design Handbook
Faster, better, and cheaper is the name of the game for machine and device designers. Demands for higher performance and increasingly efficient machines designed in a shorter amount of time with smaller design teams are challenging machine designers to improve their design processes. The Aberdeen Group identified these top machine design challenges after interviewing engineering managers and designers from 160 machine design companies in January 2008 (see Table 1). The study also discovered that to meet these challenges, successful companies follow the mechatronics design approach – they increase integration between mechanical, electrical, control, and embedded programming design processes. This machine design guide examines the best practices and tools that successful machine designers use to make different design trade-offs, meet design challenges, and increase profit.
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File type: pdf
Last download: Sun May 06, 2012 11:01:19 AM
