VibrationVIEW Help
31
© 1995-2005 Vibration Research Corporation. All rights reserved.
To enable the memorized drive, start the test and wait until the output reaches the desired level. Then
select the
menu command You will be asked if you want the memorized
drive to be saved to the hard drive with the current test. Click the "Yes" button (clicking the "No" button
will enable memorized drive temporarily, until you exit and restart the program).
Note:
This function is
not available for Sine tests.
Using memorized drive
Once a memorized drive is stored with a test, you will be given the option of using this drive when
clicking the "Run" button to start the test. When prompted, click the "Yes" button to use the memorized
drive signal, or click the "No" button to use the standard slow ramp startup procedure.
Disabling memorized drive
If you no longer wish to use the memorized drive stored with the current test, edit the test by selecting
the
menu command and clicking the Schedule tab to edit the test schedule.
The "Memorized Drive" setting for the first level, controls whether or not the test will start up with the
memorized drive. Clear this check box for the first schedule level, and click the "OK" button to close
the Test Settings dialog box to save the test.
Note: The "Memorized Drive" option in test schedule levels 2 and above always use the output signal
at the end of the previous level to determine the memorized drive signal. Therefore, these may be
enabled without first selecting the Save Current Drive menu command. Save Current Drive applies
only
to the first level in the test schedule.
2.5
How to tune the controller parameters
2.5.1
How to tune Sine controller parameters
How to tune Sine controller parameters
Click the "Settings" button
on the toolbar, or select the
menu
item.
Click on the
tab.
Start with the settings:
Startup Time
10 seconds
Response Time 50 ms
Min Response Time
2 Cycles
Slew Rate
20 dB/sec
Abort Rate
40 dB/sec
Fractional Bandwidth
10%
Maximum Bandwidth
50Hz
Sample rate
Auto
The
Startup Time
parameter controls the approximate amount of time the controller will take to go
from no output to the desired level. Having a long
Startup Time
(e.g. 10 to 20 seconds) is a good
safety precaution because it allows the operator more time to abort the test if it appears that the shaker
is moving but the input signals are not registering any acceleration (for example, when an
accelerometer cable is not connected.)
The
Response Time
and
Min Response Time
parameters are the primary loop tuning parameters.
The
Response Time
determines high frequency loop response. Shorter response times provide faster
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Summary of Contents for VibrationVIEW
Page 15: ...Document Revision Part I ...
Page 17: ...How To Part II ...
Page 96: ...Menu commands Part III ...
Page 142: ...Test Definition Part IV ...
Page 217: ...Control Centers Part V ...
Page 227: ...Accelerometer Toolbars Part VI ...
Page 231: ...Stop Codes Part VII ...
Page 263: ...Typical Views Part VIII ...
Page 268: ...VibrationVIEW Help 255 1995 2005 Vibration Research Corporation All rights reserved ...
Page 269: ...Dialog Boxes Part IX ...
Page 303: ...Windows Elements Part X ...
Page 309: ...APPENDIX Part XI ...
Page 311: ...APPENDIX 298 1995 2005 Vibration Research Corporation All rights reserved ...