|
Showing 1 - 2 of
2 matches in All Departments
Force and motion control systems of varying degrees of
sophistication have shaped the lives of all individuals living in
industrialized countries all over the world, and together with
communication technology are largely responsible for the high
standard ofliving prevalent in many communities. The brains of the
vast majority of current control systems are electronic, in the
shape of computers, microprocessors or programmable logic
controllers (PLC), the nerves are provided by sensors, mainly
electromech anical transducers, and the muscle comprises the drive
system, in most cases either electric, pneumatic or hydraulic. The
factors governing the choice of the most suitable drive are the
nature of the application, the performance specification, size,
weight, environ mental and safety constraints, with higher power
levels favouring hydraulic drives. Past experience, especially in
the machine tool sector, has clearly shown that, in the face of
competition from electric drives, it is difficult to make a
convincing case for hydraulic drives at the bottom end of the power
at fractional horsepower level. A further, and frequently range,
specifically overriding factor in the choice of drive is the
familiarity of the system designer with a particular discipline,
which can inhibit the selection of the optimum and most
cost-effective solution for a given application. One of the
objectives of this book is to help the electrical engineer overcome
his natural reluctance to apply any other than electric drives."
Force and motion control systems of varying degrees of
sophistication have shaped the lives of all individuals living in
industrialized countries all over the world, and together with
communication technology are largely responsible for the high
standard ofliving prevalent in many communities. The brains of the
vast majority of current control systems are electronic, in the
shape of computers, microprocessors or programmable logic
controllers (PLC), the nerves are provided by sensors, mainly
electromech anical transducers, and the muscle comprises the drive
system, in most cases either electric, pneumatic or hydraulic. The
factors governing the choice of the most suitable drive are the
nature of the application, the performance specification, size,
weight, environ mental and safety constraints, with higher power
levels favouring hydraulic drives. Past experience, especially in
the machine tool sector, has clearly shown that, in the face of
competition from electric drives, it is difficult to make a
convincing case for hydraulic drives at the bottom end of the power
range, specifically at fractional horsepower level. A further, and
frequently overriding factor in the choice of drive is the
familiarity of the system designer with a particular discipline,
which can inhibit the selection of the optimum and most
cost-effective solution for a given application. One of the
objectives of this book is to help the electrical engineer overcome
his natural reluctance to apply any other than electric drives."
|
|