双电梯设计 软件工程 英语论文
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2009-06-06
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The application of
double elevator coordinated control system
Firstly Introduction
Today, along with the architecture industry vigorous
development, the high-rise construction and the intellectualized
construction unceasingly emerged, the people proposed to the elevator the
more and more high request, the single elevator often could not satisfy in
the building the transportation need, this time needed reasonably to install
many elevators to alleviate the elevator movement the pressure, therefore
the elevator group control system (elevator group control system) arose at
the historic moment. At the same time, along with automated technology
fast development, also enormously promoted the elevator control
technology progress, the massive advanced controls technology applies to
the elevator group control system, enables the elevator group control
system the control characteristic to have the very big improvement. In
view of present this present situation, the present paper take two five
elevators as the design object, has conducted the more thorough analysis
research to the elevator group control question, proposed some own
understanding and the view, designed a set of PLC double elevator
coordinated control system.
Secondly Control systems hardware design
This system is mainly the exchange frequency conversion
velocity modulation system which by PLC, the frequency changer, the
control box, the monitor, the electric motor is composed (Variable
Voltage Variable Frequency, is called VVVF). Controls two elevators
movements through PLC the way, may omit between two programmable
controllers the mutual correspondences, thus causes the control system
the reliability to be higher, the structure appears compact.
this system mainly is composed by two parts, elevator controls the logical
gate realizes by PLC. Studies the elevator through the analysis the actual
movement situation and the control rule, thus designs sends out a set of
double elevators linkages control procedure, enables PLC to be able to
control two elevators the movement operations. The elevator velocity
modulation partial selects the high performance the vector control
frequency changer, matches (encoder) surveys the mouse cage type
electric motor by the pulse generator the rotational speed, thus constitutes
the electrical machinery the closed loop vector control system, the
realization mouse cage type electric motor exchange frequency
conversion velocity modulation (Variable Voltage Variable Frequency, is
called VVVF) to move.
PLC first receives shouts the ladder signal, the even level signal
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