第
34
卷第
4
期
青岛科技大学学报(白然科学版)
Vol.
:让
X
o.4
2013
年
8
月
Journal
oI Qingdao University oI Science and Technology( :'atural Science Edition) Aug. 2013
文章编号:
1672
6987(2013)04 0427
04
改进的
D
S
证据理论方法及其在凤力
发电机故障诊断中的应用
陈莹莹
I
,2
,徐余法
I
,2
,陈国初
2
(
1.
华东础工大学信息科学与工程学院
.u
每
200237;
2.
I
海电机学院也气学院.
I
海
200210)
摘
要:针对
D_S
证据理论直接处理高冲突证据合成时会出现诊断结果不合理的问题,
提出了一种相对加权证据合成法。在多个证据融合时,该方法综合利用证据的均值距离
和冲突强度表示证据冲突,并根据各证据与其它证据的冲突程度确定其权重系数,在此基
础之上采用相对加权的方法对证据的基本概率指派函数修正,然后用
D
S
规则合成。将
所提出的方法应用到风力发电机组的故障诊断中,结果表明了所才是方法对高冲突证据融
合的有效性。
关键词:
D
S
证据理论;冲突强度;故障诊断;证据均值距离
中图分类号:
0
359
文献标志码:
A
Application
of
an
Improved
D _S
Evidence
Theory
Set to
the
Fault
Diagnosis
of
飞再
v'ind
Turbine
CHEN
Ying-ying1·2,
XU
Yu-fa1·2,
CHEN
Guo-chu2
(
1.
School
of
Information
Science
and
Engineering, East
China
U nivcrsity
of
Science
and
Technology,
Shanghai
200237. China;
2.
School
of
Electrical Engineering.
Shanghai
Dia
且
Ji
University.
Shanghai
2002'10,
China)
Abstract:
D _ S
evidence
theory
involves
unreasonable
diagnosis
when
evidence
highly
conflicts.
A
new
approach
of
combination
of
relatively
weighted
belief
functions
is
pro
posed
to
solve
the
problem
.
If
many
pieces
of
evidences
are
to
be
combined,
the
amount
of
conflict
bet
ween
evidences
is
firstly
evaluated
by
both
evidence
distance
and
conflict
intensity,
and
every
piece
of
evidence
is
given
a
weight
coeffficient
according
to
its
a
mount
of
conflict
with
the
others,
Then
by
using
the
relative
weighting
of
evidence,
the
mass
function
could
be
obtained.
The
basic
probability
assignment
function
is
synthe
sized
by
using
D S
rules.
Then
the
proposed
method
on
the
diagnosis
of
wind
turbine
is
applied.
The
experimental
results
show
the
effectiveness
of
the
proposed
method
for
high
conflict
evidence.
Key
words:
D _ S
evidence
theory;
conflict
intensity;
fault
diagnosis;
evidence
average
distance
收稿日期:
2012
08
24
基金项目·国家自然科学来金项目(
60772006.
707730'11)
、上沟市教委重点学科资助项目
051
川
1)
、上海市教委科价创新重点项目
(09ZZ211).
作者简介.陈莹莹(
1988
),女,硕士研究叶飞.
第
34
卷第
4
期
青岛科技大学学报(白然科学版)
Vol.
:让
X
o.4
2013
年
8
月
Journal
oI Qingdao University oI Science and Technology( :'atural Science Edition) Aug. 2013
文章编号:
1672
6987(2013)04 0427
04
改进的
D
S
证据理论方法及其在凤力
发电机故障诊断中的应用
陈莹莹
I
,2
,徐余法
I
,2
,陈国初
2
(
1.
华东础工大学信息科学与工程学院
.u
每
200237;
2.
I
海电机学院也气学院.
I
海
200210)
摘
要:针对
D_S
证据理论直接处理高冲突证据合成时会出现诊断结果不合理的问题,
提出了一种相对加权证据合成法。在多个证据融合时,该方法综合利用证据的均值距离
和冲突强度表示证据冲突,并根据各证据与其它证据的冲突程度确定其权重系数,在此基
础之上采用相对加权的方法对证据的基本概率指派函数修正,然后用
D
S
规则合成。将
所提出的方法应用到风力发电机组的故障诊断中,结果表明了所才是方法对高冲突证据融
合的有效性。
关键词:
D
S
证据理论;冲突强度;故障诊断;证据均值距离
中图分类号:
0
359
文献标志码:
A
Application
of
an
Improved
D _S
Evidence
Theory
Set to
the
Fault
Diagnosis
of
飞再
v'ind
Turbine
CHEN
Ying-ying1·2,
XU
Yu-fa1·2,
CHEN
Guo-chu2
(
1.
School
of
Information
Science
and
Engineering, East
China
U nivcrsity
of
Science
and
Technology,
Shanghai
200237. China;
2.
School
of
Electrical Engineering.
Shanghai
Dia
且
Ji
University.
Shanghai
2002'10,
China)
Abstract:
D _ S
evidence
theory
involves
unreasonable
diagnosis
when
evidence
highly
conflicts.
A
new
approach
of
combination
of
relatively
weighted
belief
functions
is
pro
posed
to
solve
the
problem
.
If
many
pieces
of
evidences
are
to
be
combined,
the
amount
of
conflict
bet
ween
evidences
is
firstly
evaluated
by
both
evidence
distance
and
conflict
intensity,
and
every
piece
of
evidence
is
given
a
weight
coeffficient
according
to
its
a
mount
of
conflict
with
the
others,
Then
by
using
the
relative
weighting
of
evidence,
the
mass
function
could
be
obtained.
The
basic
probability
assignment
function
is
synthe
sized
by
using
D S
rules.
Then
the
proposed
method
on
the
diagnosis
of
wind
turbine
is
applied.
The
experimental
results
show
the
effectiveness
of
the
proposed
method
for
high
conflict
evidence.
Key
words:
D _ S
evidence
theory;
conflict
intensity;
fault
diagnosis;
evidence
average
distance
收稿日期:
2012
08
24
基金项目·国家自然科学来金项目(
60772006.
707730'11)
、上沟市教委重点学科资助项目
051
川
1)
、上海市教委科价创新重点项目
(09ZZ211).
作者简介.陈莹莹(
1988
),女,硕士研究叶飞.