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I
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ed
to
th
e
lev
itati
n
g
s
tate.
Fo
r
th
is
p
u
r
p
o
s
e,
th
e
w
i
n
d
i
n
g
s
o
f
tr
ac
tio
n
le
v
ita
tio
n
m
o
d
u
le
w
er
e
f
ed
b
y
D
C
,
r
eg
u
lated
b
y
th
e
v
al
u
e
i
n
th
e
f
u
n
ctio
n
o
f
th
e
air
g
ap
v
alu
e
b
et
w
ee
n
m
o
d
u
le
p
o
les
an
d
tr
ac
k
ele
m
en
ts
.
Af
ter
th
at
,
th
e
d
r
iv
e
s
y
s
te
m
w
a
s
s
tar
ted
an
d
th
e
c
u
r
r
en
ts
i
n
th
e
p
h
ase
w
in
d
i
n
g
s
w
er
e
s
w
i
t
ch
ed
ac
co
r
d
in
g
to
t
h
e
s
ig
n
al
s
,
co
m
i
n
g
f
r
o
m
t
h
e
p
o
s
it
io
n
s
e
n
s
o
r
s
.
At
t
h
e
s
a
m
e
ti
m
e,
t
h
is
n
o
n
-
co
n
tact
tr
a
n
s
p
o
r
t p
latf
o
r
m
m
o
v
es a
lo
n
g
t
h
e
tr
a
ck
s
tr
u
ctu
r
e.
3.
RE
SU
L
T
S
A
ND
AN
AL
Y
SI
S
Fig
u
r
e
4
s
h
o
w
s
tr
an
s
itio
n
p
r
o
ce
s
s
es
o
f
th
e
air
g
ap
ch
a
n
g
es
δ1
-
δ4
d
u
r
in
g
t
h
e
tr
an
s
i
ti
o
n
o
f
th
e
tr
an
s
p
o
r
t p
latf
o
r
m
to
th
e
le
v
ita
tio
n
(
Fig
u
r
e
4
a)
an
d
s
tar
t
-
u
p
m
o
d
e
s
(
Fig
u
r
e
4
b
)
.
a
b
Fig
u
r
e
4
.
T
r
an
s
itio
n
p
r
o
ce
s
s
i
n
th
e
lev
i
tatio
n
m
o
d
e
a)
,
in
th
e
s
tar
t
-
u
p
m
o
d
e
b)
I
n
an
i
n
it
ial
s
tate
th
e
p
lat
f
o
r
m
lea
n
s
a
g
ai
n
s
t
s
u
p
p
o
r
t
r
o
ller
s
.
T
h
e
air
g
ap
is
δ
=
5
m
m
.
Du
r
in
g
t
h
e
cu
r
r
en
t
s
u
p
p
l
y
to
t
h
e
p
h
a
s
e
win
d
in
g
s
o
f
tr
ac
tio
n
le
v
itat
io
n
m
o
d
u
les,
th
e
air
g
ap
s
δ
1
-
δ
4
o
f
ea
ch
s
u
s
p
en
s
io
n
p
o
in
t
d
ec
r
ea
s
e
an
d
s
tab
ilize
a
t
th
e
v
alu
e
δ
≈
2
.
3
m
m
.
I
t
p
r
o
v
e
s
th
at
th
e
p
lat
f
o
r
m
is
i
n
t
h
e
le
v
itati
n
g
s
tate.
At
t
h
e
s
tar
t
–
u
p
u
n
d
er
t
≈
0
.
5
6
s
(
Fig
u
r
e
4
b
)
,
th
e
cu
r
r
en
ts
i
n
th
e
p
h
a
s
e
w
i
n
d
in
g
s
ar
e
s
w
itc
h
ed
b
y
th
e
s
ig
n
al
o
f
p
o
s
itio
n
s
en
s
o
r
s
D1
.
T
h
e
p
latf
o
r
m
s
tar
ts
th
e
r
ap
id
tr
av
er
s
e
alo
n
g
th
e
t
r
ac
k
.
T
h
e
d
i
s
cr
ete
b
eh
av
io
r
o
f
p
h
ase
cu
r
r
en
ts
h
a
s
th
e
d
is
t
u
r
b
an
ce
ef
f
ec
t
o
n
th
e
lev
itatio
n
s
y
s
te
m
.
T
h
e
w
a
v
e
b
eh
av
io
r
o
f
t
h
e
g
ap
s
o
f
s
u
s
p
en
s
io
n
p
o
in
ts
i
n
t
h
e
r
an
g
e
o
f
1
–
4
.
5
m
m
i
s
o
b
s
er
v
ed
.
Ho
w
ev
er
,
t
h
e
le
v
itatio
n
s
y
s
te
m
k
ee
p
s
s
tab
ilit
y
an
d
w
i
t
h
i
n
cr
ea
s
i
n
g
o
f
t
h
e
tr
av
er
s
e
s
p
ee
d
o
f
th
e
p
lat
f
o
r
m
,
th
e
a
m
p
lit
u
d
e
o
f
o
s
cilla
tio
n
d
ec
r
ea
s
es.
Fig
u
r
e
5
a
g
i
v
es
th
e
o
s
c
illo
g
r
a
m
s
o
f
t
h
e
av
er
a
g
e
v
alu
e
s
c
h
an
g
es
o
f
p
h
a
s
e
cu
r
r
e
n
ts
I1
–
I4
o
f
th
e
m
o
d
u
les
i
n
t
h
e
s
u
s
p
en
s
io
n
p
o
i
n
ts
d
u
r
i
n
g
th
e
tr
an
s
itio
n
o
f
t
h
e
tr
an
s
p
o
r
t p
lat
f
o
r
m
in
to
th
e
lev
it
atio
n
m
o
d
e.
A
s
it
f
o
llo
w
s
f
r
o
m
t
h
e
o
s
ci
llo
g
r
a
m
s
,
at
th
e
b
eg
i
n
n
in
g
o
f
g
ap
s
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1
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4
ch
a
n
g
es,
t
h
er
e
is
a
s
h
ar
p
in
cr
ea
s
e
o
f
t
h
e
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r
r
en
ts
f
o
llo
w
ed
b
y
d
ec
r
ea
s
in
g
a
n
d
s
tab
ilizatio
n
o
f
t
h
eir
v
a
lu
es a
t t
h
e
le
v
el
d
eter
m
i
n
ed
b
y
th
e
air
g
ap
v
al
u
e.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
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8
694
IJ
PEDS
Vo
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8
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1
,
Ma
r
ch
201
7
:
1
7
6
–
183
180
Fig
u
r
e
5
b
s
h
o
w
s
t
h
e
o
s
cillo
g
r
a
m
s
o
f
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u
r
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I
d
c
h
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s
o
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f
r
o
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t
h
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o
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r
ce
,
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e
v
o
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e
o
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o
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r
ce
Ud
,
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h
ase
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o
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e
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,
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h
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g
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al
o
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p
o
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o
r
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d
u
r
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th
e
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an
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itio
n
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s
tar
t
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u
p
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o
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e.
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t
th
e
ti
m
e
o
f
s
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t
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n
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er
t
≈
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5
6
s
,
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er
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a
s
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ar
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i
n
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e
ase
o
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r
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Id
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ls
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g
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io
r
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h
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h
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ip
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r
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en
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v
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g
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al
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r
eq
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e
n
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o
f
t
h
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o
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n
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s
o
r
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d
u
r
i
n
g
th
e
p
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o
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m
m
o
v
in
g
.
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h
e
p
h
a
s
e
v
o
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i
s
a
p
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g
e
o
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t
w
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lar
im
p
u
ls
e
s
o
p
er
atin
g
o
n
th
e
s
ig
n
al
in
ter
v
al
o
f
th
e
p
o
s
itio
n
s
e
n
s
o
r
D1
.
T
h
e
p
o
w
er
s
u
p
p
l
y
f
l
u
tter
Ud
is
i
n
co
n
s
id
er
ab
le.
a
b
Fig
u
r
e
5
.
T
r
an
s
ien
t
s
i
n
elec
tr
ic
al
cir
cu
its
: i
n
t
h
e
lev
itatio
n
m
o
d
e
a)
,
in
th
e
s
tar
t
-
u
p
m
o
d
e
b
)
T
h
e
p
ec
u
liar
ity
o
f
t
h
e
tr
ac
tio
n
lev
itatio
n
s
y
s
te
m
is
t
h
e
m
u
t
u
al
in
f
l
u
e
n
ce
o
f
tr
ac
tio
n
s
u
b
s
y
s
te
m
s
an
d
s
u
s
p
en
s
io
n
.
Fig
u
r
e
6
s
h
o
w
s
t
h
e
o
s
cillo
g
r
a
m
s
o
f
elec
tr
o
m
ec
h
an
ica
l
p
r
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s
s
es
o
cc
u
r
r
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g
d
u
r
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g
th
e
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a
n
s
itio
n
o
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h
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tr
ac
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n
le
v
itat
io
n
s
y
s
t
e
m
f
r
o
m
t
h
e
le
v
it
atio
n
m
o
d
e
to
t
h
e
le
v
itati
n
g
tr
a
v
er
s
al
m
o
d
e
alo
n
g
th
e
tr
ac
k
s
tr
u
ct
u
r
e.
T
h
e
o
s
cillo
g
r
a
m
p
r
esen
t
s
th
e
p
h
ase
cu
r
r
e
n
ts
o
f
th
e
m
o
d
u
les
(
I
1a
…
I
4
с
)
,
s
ig
n
als
o
f
g
ap
s
e
n
s
o
r
s
δ
1
–
δ
4
,
s
ig
n
al
s
o
f
p
o
s
itio
n
s
e
n
s
o
r
s
D
a
, D
b
, D
c
.
Fig
u
r
e
6
.
Oscill
o
g
r
a
m
s
o
f
p
h
a
s
e
cu
r
r
en
t
I
,
air
g
ap
δ,
an
d
lo
g
i
c
s
ig
n
al
D
o
f
p
o
s
itio
n
s
e
n
s
o
r
s
T
h
e
p
h
ase
c
u
r
r
en
t
s
ar
e
s
en
t
t
o
th
e
w
in
d
i
n
g
s
a
t
t
h
e
in
ter
v
al
s
o
f
p
o
s
iti
v
e
v
al
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es
o
f
p
o
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it
i
o
n
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e
n
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o
r
s
s
ig
n
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s
.
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n
t
h
is
ca
s
e,
th
e
c
u
r
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d
v
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g
ap
.
Fi
g
u
r
e
7
s
h
o
w
s
t
h
e
d
etailed
p
r
o
ce
s
s
es.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
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SS
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S
ta
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Op
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e
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Tr
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tio
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.
.
.
.
(
A
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V
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181
Fig
u
r
e
7
.
Oscill
o
g
r
a
m
s
o
f
p
h
a
s
e
v
o
lta
g
e
U1
,
p
h
ase
cu
r
r
en
t
I1
,
air
g
ap
δ1
,
an
d
lo
g
ic
s
ig
n
a
l
D1
o
f
p
o
s
itio
n
s
en
s
o
r
s
A
t
th
e
ti
m
e
i
n
ter
v
a
l
t
<
0
.
4
s
,
th
e
p
lat
f
o
r
m
i
s
i
n
t
h
e
le
v
ita
tin
g
s
tall
p
o
s
itio
n
.
D
C
is
s
e
n
t
to
th
e
p
h
a
s
e
w
i
n
d
i
n
g
.
At
t
h
e
ti
m
e
in
ter
v
al
0
.
4
<
t<0
.
5
6
s
,
th
e
o
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er
atio
n
m
o
d
e
is
ch
a
n
g
ed
–
t
h
e
c
u
r
r
en
t
i
n
t
h
e
p
h
ase
is
s
w
itc
h
ed
o
f
f
.
A
t
th
e
ti
m
e
t =
0
.
5
6
s
,
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e
s
y
s
te
m
is
s
w
itc
h
ed
to
th
e
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t
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m
o
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e.
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h
as
e
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g
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s
ap
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e
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e
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y
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s
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g
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a
l
o
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e
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o
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itio
n
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en
s
o
r
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.
T
h
e
a
m
p
lit
u
d
e
o
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e
u
n
ip
o
lar
p
u
ls
e
is
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u
lated
in
t
h
e
w
a
y
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ee
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e
g
i
v
en
v
al
u
e
o
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g
ap
.
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ith
i
n
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ea
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o
f
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av
er
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e
s
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ee
d
o
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p
latf
o
r
m
,
t
h
e
a
m
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lit
u
d
e
o
f
th
e
g
ap
o
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n
d
ec
r
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es.
T
o
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m
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ar
e
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e
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er
f
o
r
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a
n
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I
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IJ
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3
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t p
latf
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m
(
Fi
g
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r
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.
Fig
u
r
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8
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CO
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ased
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li
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s
w
i
tch
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
SS
N:
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8
694
S
ta
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Op
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Mo
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183
r
elu
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m
o
to
r
,
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s
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y
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l.
T
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p
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lev
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NO
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R
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R
FME
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7
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RE
F
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R
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NC
E
S
[1
]
P.
K.
Bisw
a
s,
e
t
a
l.
,
“
A
n
a
l
y
sis
o
f
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n
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Ty
p
e
Ra
il
a
n
d
A
c
t
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a
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o
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e
,
”
IJ
ET
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,
v
o
l
/i
ss
u
e
:
2
(
5
),
p
p
.
3
2
-
3
9
,
2
0
1
2
.
[2
]
N.
C.
L
e
n
in
,
e
t
a
l.
,
“
De
sig
n
a
n
d
Ex
p
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rime
n
tal
V
e
rif
ica
ti
o
n
of
L
i
n
e
a
r
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w
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Re
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tan
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M
o
to
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k
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P
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”
IJ
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ter
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Dr
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:
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(
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)
,
p
p
.
1
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5
,
2
0
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5
.
[3
]
J.
H.
Ch
a
n
g
,
e
t
a
l.
,
“
T
ra
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ly
sis re
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lt
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IEE
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ra
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a
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issu
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:
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(4
)
,
p
p
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2
0
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.
[4
]
A
.
V
.
Kire
e
v
,
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t
a
l.
,
“
P
o
ten
ti
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l
D
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v
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h
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s
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a
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S
u
sp
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n
si
o
n
,
”
IJ
PE
DS
In
ter
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o
u
rn
a
l
o
f
Po
we
r E
lec
tro
n
ics
a
n
d
Dr
ive
S
y
ste
ms
,
v
o
l
/i
ss
u
e
:
6
(
1
),
p
p
.
2
6
-
3
1
,
2
0
1
5
.
[5
]
N.
G
r
e
b
e
n
n
ik
o
v
,
e
t
a
l.
,
“
M
a
th
e
m
a
ti
c
a
l
M
o
d
e
l
of
L
in
e
a
r
S
w
it
c
h
e
d
Re
lu
c
tan
c
e
M
o
to
r
w
it
h
M
u
tu
a
l
In
d
u
c
tan
c
e
Co
n
sid
e
ra
ti
o
n
,
”
IJ
PE
D
S
,
v
o
l
/i
ss
u
e
:
6
(
2
)
,
p
p
.
2
2
5
-
2
3
2
,
2
0
1
5
.
[6
]
N.
G
re
b
e
n
n
ik
o
v
,
e
t
a
l.
,
“
Co
m
p
u
ter
M
o
d
e
li
n
g
o
f
Co
m
b
in
e
d
T
ra
c
ti
o
n
L
e
v
it
a
ti
o
n
S
y
ste
m
Eq
u
ip
p
e
d
w
it
h
L
in
e
a
r
S
w
it
c
h
e
d
Re
lu
c
tan
c
e
M
o
t
o
rs,
”
J
E
AS
,
v
o
l
/
issu
e
:
1
0
(8
-
1
2
)
,
p
p
.
2
4
7
-
2
5
1
,
2
0
1
5
.
[7
]
N.
G
re
b
e
n
n
ik
o
v
,
e
t
a
l.
,
“
V
e
rsio
n
s
of
S
w
it
c
h
e
d
Re
lu
c
tan
c
e
G
e
n
e
ra
ti
o
r
De
sig
n
at
a
Co
n
sta
n
t
S
tato
r
Co
n
f
ig
u
ra
ti
o
n
,
”
IJ
PE
DS
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
Po
we
r E
lec
tro
n
ics
a
n
d
Dr
ive
S
y
ste
ms
,
v
o
l
/i
ss
u
e
:
6
(
1
)
,
p
p
.
6
5
-
6
9
,
2
0
1
5
.
[8
]
P
.
S
ri
n
iv
a
s,
e
t
a
l.
,
“
Co
m
p
a
ra
ti
v
e
A
n
a
l
y
sis
o
f
DI
T
C
Ba
s
e
d
S
w
it
c
h
e
d
Re
lu
c
tan
c
e
M
o
to
r
Us
in
g
A
s
y
m
m
e
tri
c
Co
n
v
e
rter an
d
F
o
u
r
-
L
e
v
e
l
Co
n
v
e
r
ter
,
”
Bu
ll
e
ti
n
o
f
E
EI
,
v
ol
/i
ss
u
e
:
5
(
1
)
,
p
p
.
1
0
9
-
1
1
9
,
2
0
1
6
.
[9
]
P
.
Ra
f
a
jd
u
s,
e
t
a
l.
,
“
A
n
a
l
y
sis
o
f
th
e
s
w
it
c
h
e
d
re
lu
c
tan
c
e
m
o
t
o
r
(S
RM
)
p
a
ra
m
e
ter
s
,
”
J
o
u
rn
a
l
o
f
e
lec
trica
l
e
n
g
in
e
e
rin
g
,
v
o
l
/i
ss
u
e
:
5
5
(7
-
8
),
p
p
.
1
9
5
–
2
0
0
,
2
0
0
4
.
B
I
O
G
RAP
H
I
E
S
O
F
AUTH
O
RS
Ale
x
a
n
d
e
r
V
la
d
i
m
ir
o
v
i
c
h
K
ire
e
v
wa
s
b
o
rn
in
1
9
7
4
.
He
f
in
ish
e
d
-
Ru
ss
ian
S
tate
T
e
c
h
n
ica
l
Un
iv
e
rsit
y
(NP
I),
N
o
v
o
c
h
e
rk
a
ss
k
o
n
"
P
o
w
e
r
su
p
p
ly
o
f
in
d
u
strial
e
n
terp
rise
s"
sp
e
c
ialty
in
1
9
9
9
.
He
re
c
e
iv
e
d
P
h
D
d
e
g
re
e
in
Tec
h
n
ica
l
S
c
ien
c
e
s
in
2
0
0
4
.
S
in
c
e
2
0
0
6
h
e
h
a
s
w
o
rk
e
d
a
s
a
ss
o
c
iate
d
p
ro
f
e
ss
o
r
in
S
o
u
t
h
-
Ru
ss
ian
S
tate
Tec
h
n
ica
l
Un
iv
e
rsit
y
(NP
I).
His
m
a
in
sc
i
e
n
ti
f
ic
in
tere
sts
a
re
re
late
d
to
c
o
n
tr
o
l
o
f
e
lec
tri
c
a
l
d
ri
v
e
,
s
w
it
c
h
e
d
re
lu
c
tan
c
e
m
o
to
rs,
si
m
u
latio
n
.
G
e
n
n
a
d
iy
Ni
k
o
la
e
v
ic
h
K
o
n
o
n
o
v
w
a
s
b
o
rn
in
1
9
5
2
.
He
f
in
ish
e
d
S
o
u
t
h
-
Ru
ss
ian
S
tate
T
e
c
h
n
ica
l
Un
iv
e
rsit
y
(NP
I),
No
v
o
c
h
e
rk
a
ss
k
o
n
"
A
u
to
m
a
ti
o
n
a
n
d
Re
m
o
te
C
o
n
tr
o
l"
sp
e
c
ialt
y
in
1
9
7
9
.
His
m
a
in
sc
ien
ti
f
ic i
n
tere
sts a
re
re
late
d
to
M
a
g
lev
tran
sp
o
rtati
o
n
sy
ste
m
,
v
e
h
icle
s tr
a
c
ti
o
n
d
r
iv
e
.
Ale
x
a
n
d
e
r
V
la
d
i
m
i
r
o
v
ich
Le
b
e
d
e
v
w
a
s
b
o
rn
i
n
1
9
5
8
.
He
f
in
ish
e
d
S
o
u
t
h
-
Ru
ss
ian
S
tate
T
e
c
h
n
ica
l
Un
iv
e
rsit
y
(NP
I),
N
o
v
o
c
h
e
rk
a
ss
k
o
n
“
I
n
f
o
rm
a
ti
o
n
a
l
-
m
e
a
su
rin
g
tec
h
n
i
q
u
e
”
sp
e
c
ialty
in
1
9
7
9
.
His
m
a
in
s
c
ien
ti
f
ic
in
ter
e
sts
a
r
e
re
lat
e
d
to
c
o
n
tro
l
a
lg
o
rit
h
m
s
e
lec
tri
c
m
o
to
rs,
a
d
ju
stin
g
a
n
d
tri
a
ls
o
f
m
a
n
a
g
e
m
e
n
t
s
y
ste
m
s
b
y
e
lec
tri
c
d
riv
e
s.
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