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参数资料
| 型号： | VR001 |
| 厂商： | Mide Technology Corporation |
| 文件页数： | 12/15页 |
| 文件大小： | 0K |
| 描述： | VIBRATION DATA LOGGER |
| 产品培训模块： | Volture EHE004 Piezoelectric Energy Harvesting Conditioning Circuit |
| 特色产品： | Slam Stick? Vibration Recorder |
| 标准包装： | 1 |
| 系列： | Slam Stick™, Volture™ |
| 附件类型： | 振动特性鉴定设备 |
| 适用于相关产品： | Volture? 振动能量收集器 |
| 配用： | V25W-ND - PIEZOELECTRIC ENERGY HARVESTER V20W-ND - PIEZOELECTRIC ENERGY HARVESTER V21BL-ND - PIEZOELECTRIC ENERGY HARVESTER V21B-ND - PIEZOELECTRIC ENERGY HARVESTER V22BL-ND - PIEZOELECTRIC ENERGY HARVESTER V22B-ND - PIEZOELECTRIC ENERGY HARVESTER |
APPLICATIONS INFORMATION
Vibration v. Time
X
Y
2.5
2
1.5
1
0.5
0
-0.5
Z
-1
5
10
15
20
25
30
35
40
Time (s)
Figure 2: Time domain response of a commercial jumbo jet during taxiing.
A series of vibration recordings were taken during a
flight on a commercial jumbo jet. The first was taken
during taxiing; the second taken during active flight. In
each case, the recorder was placed on the floor of the
craft with the button facing upward (Z-axis normal to the
ground). The time-domain result is shown in Figure 2.
-3
Vibration v. Frequency
x 10
Unsurprisingly, the greatest energy is seen in the Z
direction. The 1-D FFT result for this axis, shown in
Figure 3, shows several features that may be of interest.
The first is a comparatively strong peak at around
920Hz, some extremely low-frequency components
(1.5Hz and 5Hz), and a broad swath centered around
260Hz or so. What’s producing these features, and are
these consistent? Would any of them be useful in an
event triggering or energy harvesting application?
12
For a more detailed look at the vibration profile, the 2-D
10
8
6
4
2
FFT was plotted with a low ceiling value (~ 0.05) in
order to clearly show each feature of interest. For this
Figure, the surface plot was rotated so that it is viewed
directly from the top. Some of the identifiable features
have been labeled.With this image, the contributors
become more clear. The 920Hz peak is extremely
consistent both in time and frequency, most likely
0
200
400
600 800 1000
Frequency (Hz)
1200
1400
contributed by the aircraft Auxiliary Power Unit (APU).
Although it appears to have the highest amplitude in the
1-D result by far, it is not the highest amplitude signal
Figure 3: 1-D FFT of the time domain data shown in Figure 2.
after all – those in the 150-375Hz range have higher
REVISION N0. 001
REVISION DATE: 08-24-2010
www.mide.com
12
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