522
understand what information we can extract from measurements and if really, we can use
vibration analysis for road surface evaluation.
Signals segmentation strategy should take into account many factors. It has been found
that it should be multilevel strategy. One of conclusions may be that during drive on gear 2
the operator can use a break and it will affect the vibration signal (not related to road surface). Fig. 11 presents break pressure data extracted according to gear = 2. It is clearly seen
that for a machine with an empty box there are several situations that the operator tries to
slow down machine by brake. For loaded machine (box filled with ore) usage of brake is
much more intensive. It significantly will affect analysis—this is the reason we have selected
drive with the empty box. In general, the preprocessing of data (for statistical analysis) should
be done very carefully.
Figure 8. Measurement number 2 – speed, EngRMP and FuelUs inspection—influence of road quality on vibrations.
Figure 9. Measurement number 4 – speed context inspection—influence of road quality on vibrations.
20
breakP
. ---" j .
accelx
1
I
1
' I
::~::::~~,~~~~=~:~:~_; : : 1 - f i?i~:: :~:
~ 12- _ 1,"~ ,~_~ _,:;. _ .:.-~, 1 £'''\•1'·fil'l~~~"·l. "'i'f~:~\\-L,N/1' ,, = ::~::L~~'i. ·'' . : ! "· ~;~:.J~~ iJ,..ll1b·tl~L~'~', · 1" .:--=-~~~~,~..w_j,l.~ _______ ~
~ SPEED
dnvmg to unl~ad1ng po1~
1
i
I
: d nv1ng to m1r.ng f ace
:
i 10 - - _l"'·~:_,L
gear reduction befor~ maneuvers for unloading
8
11 ,
,1\, ~,,jl
I
1.'
I
1 111
HYOOILP '_j
j1
'I
.------'
1
80
18
1
unload~~r ~ '•
= ----~-----=--=-=-=-- - , - - . . . ; _
85
measurement4
90
time[min]
breakP
:accel x
95
100
105
'r I'
/1 o\')" ' ' '
I I I., ,,I ,. ' II . . •/1 ~ '
-~ 121''·';,·.,,,,,, .• , /l l "' i l e ' C/
C ' \ W•"' .ti ; ' . : : . . : ~ ; ~· ~ · ' . : ' " , · . ~ ) ( : , ; : _ : ~ . ~ ~ ~ ~ : : : ~ \ ~ · : ~ ~ ~ ~ : ~ l : l l / : : : 1 • / ~ ~ ~ ' ~ ~ . : : ~ · ~ ~
" ~
.;, h -·:~~
,-------------,
1 ..., I
H Y DOI L P
-
:
W 1
1
~ -;, ~
unloadmg
1
I
1 1
·- - - - - - - J I
-
I
I :1
I
------1---I
,_
,,..,.,,,. ,-., . . . ·-·" ' ·' · - . . . . . . . . .
___ · ~~:Y ~ _ i\~.~~- .rt~: i./l.~~;_ J,;·J . . ~~~~;:!J·,A~.._~r~l~r~· ~~~~C. -~-~~
I
I
I.
I
-~( ',\ ,r · · . . , . . ' \1,, ~ , . · \, (· · · · · .lt~ ~\!•~- ~ - ; - A ' · ' . ~ }(·["rt';· ;2 18
220
222
time[min]
understand what information we can extract from measurements and if really, we can use
vibration analysis for road surface evaluation.
Signals segmentation strategy should take into account many factors. It has been found
that it should be multilevel strategy. One of conclusions may be that during drive on gear 2
the operator can use a break and it will affect the vibration signal (not related to road surface). Fig. 11 presents break pressure data extracted according to gear = 2. It is clearly seen
that for a machine with an empty box there are several situations that the operator tries to
slow down machine by brake. For loaded machine (box filled with ore) usage of brake is
much more intensive. It significantly will affect analysis—this is the reason we have selected
drive with the empty box. In general, the preprocessing of data (for statistical analysis) should
be done very carefully.
Figure 8. Measurement number 2 – speed, EngRMP and FuelUs inspection—influence of road quality on vibrations.
Figure 9. Measurement number 4 – speed context inspection—influence of road quality on vibrations.
20
breakP
. ---" j .
accelx
1
I
1
' I
::~::::~~,~~~~=~:~:~_; : : 1 - f i?i~:: :~:
~ 12- _ 1,"~ ,~_~ _,:;. _ .:.-~, 1 £'''\•1'·fil'l~~~"·l. "'i'f~:~\\-L,N/1' ,, = ::~::L~~'i. ·'' . : ! "· ~;~:.J~~ iJ,..ll1b·tl~L~'~', · 1" .:--=-~~~~,~..w_j,l.~ _______ ~
~ SPEED
dnvmg to unl~ad1ng po1~
1
i
I
: d nv1ng to m1r.ng f ace
:
i 10 - - _l"'·~:_,L
gear reduction befor~ maneuvers for unloading
8
11 ,
,1\, ~,,jl
I
1.'
I
1 111
HYOOILP '_j
j1
'I
.------'
1
80
18
1
unload~~r ~ '•
= ----~-----=--=-=-=-- - , - - . . . ; _
85
measurement4
90
time[min]
breakP
:accel x
95
100
105
'r I'
/1 o\')" ' ' '
I I I., ,,I ,. ' II . . •/1 ~ '
-~ 121''·';,·.,,,,,, .• , /l l "' i l e ' C/
C ' \ W•"' .ti ; ' . : : . . : ~ ; ~· ~ · ' . : ' " , · . ~ ) ( : , ; : _ : ~ . ~ ~ ~ ~ : : : ~ \ ~ · : ~ ~ ~ ~ : ~ l : l l / : : : 1 • / ~ ~ ~ ' ~ ~ . : : ~ · ~ ~
" ~
.;, h -·:~~
,-------------,
1 ..., I
H Y DOI L P
-
:
W 1
1
~ -;, ~
unloadmg
1
I
1 1
·- - - - - - - J I
-
I
I :1
I
------1---I
,_
,,..,.,,,. ,-., . . . ·-·" ' ·' · - . . . . . . . . .
___ · ~~:Y ~ _ i\~.~~- .rt~: i./l.~~;_ J,;·J . . ~~~~;:!J·,A~.._~r~l~r~· ~~~~C. -~-~~
I
I
I.
I
-~( ',\ ,r · · . . , . . ' \1,, ~ , . · \, (· · · · · .lt~ ~\!•~- ~ - ; - A ' · ' . ~ }(·["rt';· ;2 18
220
222
time[min]