e-book

Control Systems

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Automatic control of many day to day tasks relieves the human beings from performing repetitive
manual operations. Automatic control allows optimal performance ,of dynamic systems, increases
productivity enormously, removes drudgery of performing same task again and again. Imagine manual
control of a simple room heating system. If the room temperature is to be maintained at a desired
temperature TOe, by controlling the current in an electrical heating system, the current may be
adjusted by moving the variable arm in a rheostat. The temperature of the room depends on a host of
factors : number of persons in the room, the opening and closing of doors due to persons moving in
and out, fluctuation ~n the supply voltage etc. A human operator has to continuously monitor the
temperature indicated by a thermometer and keep on adjusting the rheostat to maintain the temperature
all the twenty four hours. The operator should be continuously alert and relentlessly perform a simple
job of moving the arm of the rheostat. Any mistake on his part may result in great discomfiture to the
persons in the room.

Now, imagine the same operation of measuring the temperature, estimating the error between
the desired temperature and the actual temperature, moving the arm of the rheostat accurately by
an automatic controller. Since error. between the actual temperature and the desired temperature
is continuously obtained and used to activate the controller, any disturbances caused due to
movements of persons occupying the room, supply variations etc. will be automatically taken
care of. How much of a relief it is ! This is only a simple task, but many complex industrial
processes, space craft systems, missile guidance systems, robotic systems, numerical control
of machine tools employ automatic control systems. There is no field in engineering where
automatic control is not employed. Even human system is a very complex automatic feedback
control system. The modem engineers and scientists must, therefore, have a thorough knowledge
of the principles of automatic control systems.

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Ketersediaan

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Informasi Detail

Judul Seri

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No. Panggil

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Penerbit

Hyderabad : BS Publications., 2008

Deskripsi Fisik

vii, 485 Hlm.

Bahasa

English

ISBN/ISSN

978-81-7800-177-2

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2nd ed.

Subjek

ELEKTRONIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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