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MTR-51 014材料试验程序可靠性测定统计方法（1969年7月31日）

ID：41171

大小：0.98 MB

页数：44页

时间：2023-03-15

金币：20

上传者：战必胜
Materiel
Test
Procedure 5-1-014
i
31
July
1969
White
Sands
Missile
Range
U.
S.
ARMY
TEST
AND
EVALUATION
COMW4ND
oBACKGROUND
DOCUMENT
STATISTICAL
METHODS
OF
RELIABILITY
DETERMINATION
1
.
INTRODUCTION
*
The
increased
emphasis
placed
upon
high
reliability
for
Army
missile
and
rocket
systems
and
the
need
for
better
collection,
analysis,
and
reporting
of
success
and
failure
data
has
made
the
measurement
of
reliability
that
is
obtained
throughout
the
Engineering
Test
Program
one
of
the
most
important
in-
dices
used
to
assess
missile
system
zapability.
Reliability
and
its
companion
index,
accuracy,
determined
under
various
test
conditions
are
two
factors
which
are
relevant
in
any
missile
system
evaluation.
The
fundamental
purpose
of
re-
t
liability
is
to
estimate
the
probability
of
the
successful
performance
of
an
item
under
specified
conditions
and
to
compute
the
expected
value
of
this
prob-
ability
with
a
specified
confidence
for
the
population
of
the
items
considered
A
well
planned
and
executed
reliability
program
for
engineering
test
results
in
data
that
reduces
to
provide:
a.
Numerical
estimates
of
system
probability
of
successful
perfor-
mance
under
specified
conditions.
b.
The
confidence
or
degree
of
assurance
that
is
attained
in
the
estimates
of
a.
above
as
measures
of
the
true
reliability.
c.
The
existence
(or
non-existence)
of
significant
trends
in
reli-
ability
as
a
function
of
test
conditions.
d.
Failed
parts
information.
e.
Reliability
estlmatLs
that
are
part
of
the
factors
used
in
a
system
effectiveness
evaluation.
The
statistical
methods
of
reliability
used
in
planning,
collecting,
analysis,
the
reporting
of
reliability
data
for
missile
and
rocket
systems
during
the
Engineering
Test
program
are
discussed
in
the
following
sectirns.
2.
RELIABILiTY
REQUIREMENTS
Missile
system
reliability
requirements
are
stated
in
the
following
ways:
a.
The
minimum
inflight
reliability
of
the
missile
shall
be
0.90
aga(nst
a
specified
target
at
a
range
of
not
less
than
meters
and
an
altitude
of
meters.
b.
After
a
6
(or
12)
month
storage
the
missile
shall
undergo
a
functional
checkout
with
a
reliability
of
at
least
0.95.
c.
Missile
prefire
checkout
reliability
shall
be
at
least
0.95.
d.
The
missile
system
availability'
shall
not
be
less
than
0.90.
e.
The
tracking
(or
identification)
radar
shall
have
a
Mean
Time
Between
Failure2
(MTBF)
of
not
less
than
hours.
D
D
C
Reproduced
byD
D C
6
e.
NATIONAL
TECHNICAL
INFORMATION
SRVCE
1
~~e
tosa~~---SprNAinfild
Va
215
M. A P
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