VG091A-2LN
Smallest North-finding capabilities
Smallest North-Finding
Fiber Optic Gyroscope
A Fizoptika Product
VG091A-2LN
MAIN PARAMETERS ( typical values )
Rate range
50 o/s
Scale Factor (SF)
35 mV/deg/s
Frequency range
0... 1 kHz
Angle random walk
0.015 o/√h
Bias stability, RMS
2 o/h
Magnetic response
<0.01 o/h/G
SF stability, RMS
0.03%
Readiness time
0.02 s
Salient FEATURES
Very low power
Fastest start-up
Widest bandwidth
Lowest weight
ENVIRONMENT
Temperature operating
Temperature endurance (2 hr)
Vibration, RMS
Shocks
Acceleration
DIMENSIONS
0.8 W
0.02 s
1kHz
30 grm
RELIABILITY
MTBF
60000 hours (20º С, predicted)
Lifetime (predicted) 15 years
-40°C ... +70°C
-55°C... +85°C
12g, 20Hz...2kHz
150g, 1 ms
5g
Fizoptika Product
North finding Demonstration
The approach used in our demonstration involves precisely measuring the orientation of
the earth’s “spin” vector (i.e. North). This is facilitated by the VG091A-2LN inherent low
noise characteristics.
Fizoptika Product
North finding Demonstration
SYSTEM SET-UP
• Based on lab-view software &
standard hardware
• Small stepper motor
OPERATION
• Stepper with mounted FOG scans 360o
• At pre-set point during scan gyro
output is recorded
• VG091A-2LN is static during
measurement
• A sine curve is fitted onto recorded
output
• Highest point on curve indicates north
• Stepper is rotated to location of
highest point on curve to indicate
North
Fizoptika Product
VG 091A 2LN
North-finding Mode - Scanning Earth
Measurements made throughout scan
North +8 deg/hr
South -8 deg/hr
Allan plot
Angle random walk 0.015 o/√h
Fizoptika Product