| EPE-PEMC 2004 - Topic 09-4: Drives in other industries | ||
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 | Control Of A Flax Breaking Machine
By Vytautas Kepalas, Ceslovas Ramonas, Romualdas Masteika | |
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Abstract: A paper presents mechanical flax processing
peculiarities in a flax layer former unit and a breaking unit of
flax breaking machine. As result of investigation a block
diagram of flax flow control is structured. A digital model of
process is made according to the block diagram.
Model research shows necessity to use flax layer thickness
feedback together with a proportional controller for processing
automation. Flax layer thickness closed loop system lets to avoid
layer thickness overshoot that may be a reason of breaking unit
fouling by concentrated quantity of flash. It is proposed to create
an algorithm of breaking machine digital control using
simulation results.
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| | Efficiency Of Frequency-Controlled Drive In Hoisting Gear Applications
By I. Braslavsky, Z. Ishmatov, Y. Plotnikov, E. Barats, N. Kirpichnikov | |
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Abstract: The possibility of frequency-controlled drive (FCD)
application in hoisting gears is considered with taking example by a
gantry container crane and an elevator. The results of energy
consumption and power losses calculations for conventional drives
and FCD are given. High efficiency of FCD is shown.
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| | Energy Consumption Optimization During Starting Of Induction Motor
By I. Ya. Braslavsky, A. V. Kostylev, D. P. Stepanuk | |
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Abstract: The paper deals with optimisation of energy
consumption during start in soft-start systems based on thyristor
voltage converter and induction motor (TVC–IM). It is shown
that the definition of optimum voltage ramp provides the 10-15%
reducing of losses in compare with direct start. The method of
voltage ramp optimisation based on genetic algorithm is
proposed.
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| | Noninteracting Control Of Web Forces And Cut-Off Register Errors In Rotary Printing Presses With Electronic Line Shafts
By Guenther Brandenburg, Stefan Geissenberger, Andreas Klemm | |
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Abstract: Replacing the mechanical line shaft, which is necessary
for the synchronous drive of the printing units of rotary
offset printing presses, through an “electronic line shaft” consisting
of highly precise speed- and angle-controlled AC motors,
the decoupled control of web forces and the so-called cutoff
register error has become feasible. Waste paper is considerably
reduced and the machine operation is made easier.
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| | Observer Based Tension Control In Hot-Strip Finishing Mill
By J. Fetyko, E. Hutnik, J. Cvercko, V. Fedak | |
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Abstract: The paper deals with design of a tension control strategy
for hot strip finishing mill. The observer based feedback
control of the tension and loop angle with dynamic model based
feed-forward of the looper drive torque is designed and compared
with conventional control system. The advantages of the
proposed structure are shown. Considerable dynamic improvement
is attained both to the reference input as well as to the
disturbances.
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| | Pump Assembly Optimum Control
By Leszek Szychta | |
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Abstract: The article discusses pump properties at constant
head of water as a function of variable rotational speeds. A
dependency approximating the pump efficiency as a function of
rotational speed was determined. The criterion for optimum
control of pump work was defined. A control system was
determined based on the criterion for the optimum value of the
pump efficiency. A control method following the leading pump
was defined. An example of application using the optimum
control method was described.
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| | The Usage A Programmable Logic Controller (plc) For The Control Of Great Capacity Excavators From Carbon Exploitations
By M. Dobriceanu, A. Bitoleanu, M. Popescu, M. Linca | |
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Abstract: The modernization of the electrical automation, of the
machines from the surface carbon exploitation, represents a
continuous preoccupation for specialists within the respective
exploitations and for those collaborators from the high grade
learning institutes and experienced specialist from firms witch
work in domain. This paper presents some of the main aspects
regarding the use of programmable logic controller (PLC) for
driving and control of great capacity excavator. In the system’s
development there are used programmable logic controllers
made by the German group of firms Moeller witch is one of the
main manufacturers of electric energy distribution equipments,
industrial and civil automations.
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| | Vector Control Of A Linear Motor For High Speed Machining Processes
By Daniel Rebon, Gerardo Tapia, Arantxa Tapia | |
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Abstract: Actually, one of the most important requirements in a
high speed machine tool is related to an extraordinary rapid
response together with a zero position error; so that, an important
productivity level would be achieved taking into account both
quantity and quality of the produced elements. The work presented
in this paper aims to reach an optimal positioning of a linear
permanent magnet synchronous motor (typically used in machine
tools) with a relatively small response time.
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