Moog Crossbow VG700MB Series - Manual (Page 10)

VG700M User’s Manual
Page 4 Doc.# 7430-0280-01 Rev. F
2.3 Setup GyroView
With the DMU connected to your PC serial port and powered, open the
GyroView software.
1. GyroView should automatically detect the DMU and display the
serial number and firmware version if it is connected.
2. If GyroView does not connect, check that you have the correct
COM port selected. You find this under the “DMU” menu.
3. Select the type of display you want under the menu item
“Windows”. Graph displays a real time graph of all the DMU
data; Navigation shows an artificial horizon display.
4. You can log data to a file by entering a data file name. You can
select the rate at which data is saved to disk.
5. Under “DMU” or “DMU Controls”, you can set the erection rate
and rate sensor zeroing time. Enter a value, and click the button.
The value is not sent until the button is clicked.
6. If the status indicator says, “Connected”, you’re ready to go. If the
status indicator doesn’t say connected, check the connections
between the DMU and the computer; check the power; check the
serial COM port assignment on your computer.
2.4 Take Measurements
Once you have configured GyroView to work with your DMU, pick what
kind of measurement you wish to see. “Graph” will show you the output
you choose as a strip-chart type graph of value vs. time. “FFT” will show
you a real-time fast Fourier transform of the output you choose.
“Navigation” will show an artificial horizon and the stabilized pitch and roll
output of the DMU. (“Navigation” does not work with the IMU models.)
Let the DMU warm up for at least 30 seconds when you first turn it on.
You should zero the rate sensors when you first use the DMU. Set the
DMU down in a stable place. On the main control panel, enter a value into
the “zero avg time” box. “3” will work well. Click the “Z” button. This
measures the rate sensor bias and sets the rate sensor outputs to zero. The
zeroing command turns on the high pass filter rate bias estimation that takes
approximately 3 minutes. The DMU needs to be held still (motionless)
during zeroing operation. The “zero” command is discussed more in “The
‘Zero’ Command” section. Now you’re ready to use the DMU!