Integration of a PLC Based Control System for Improved Performance and Reliability of the AN/BRR-6 Antenna System

amaranthgymnophoriaΗλεκτρονική - Συσκευές

15 Νοε 2013 (πριν από 3 χρόνια και 7 μήνες)

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Brian Edwards

Integration of a PLC Based Control System for Improved Performance
and Reliability of the AN/BRR
-
6 Antenna System




This paper will detail
t
he design and performance of the new digital control

system for the

AN/BRR
-
6 communication buoy

contrasted with the current analog
control system.
The AN/BRR
-
6
antenna

system

is
comprised of a towed
communications

buoy with a

mechanical control system
; and

was
installed
on Trident Class submarines
during new construction in the 1
9
70’s and 1980’s
. As

the system aged, reliability has
decreased. The requirement to
increase reliability spurred a
newly designed control
system

that would address the shortcomings of the current system. The main focus of this
paper will be to highlight and discuss the conve
rsion of analog electronic systems to PLC
based systems. The paper will cover issues ranging from system design to component
reliability and repair.



Recently,
the performance of the AN/BRR
-
6 communications buoy has
experienced degra
ded performance and r
eliability
due to issues with the analog control
system.

The original buoy control system consisted of an analog control system
comprised of circuit cards with
discrete components. It contained

eighteen circuit card
assemblies in the main control unit as w
ell as three circuit card assemblies in an auxiliary
control unit.
The
analog

control system
was experiencing

both perfo
rmance and
obsolescence issues

with many of the components on these circuit boards.

In addition,
due to the state of the current electro
nics, there
was

no flexibility to enhance system
operation or correct any anomalies in functionality.
As
the number of
failures ha
s

increased, the complexity of
the analog

system made ide
ntification and isolation of

failures difficult and time consuming to correct.
All of these factors necessitated a new
design.



The new digital control design addresses the performance and
obsolescence

issues
while

provid
ing

redundant capability t
o prevent single point failure
s
.

In

this paper, we
will outline the issues with the
original analog control system and present how the new
digital control system addresses these issues and how it provides additional controller
capability, sensor redundancy
,

error identification,

and data re
cording. This paper will
also provide an analysis of digital control v
ersu
s analog control performance on our
SSBN Fleet assets.