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Inertial Sensor
SAST has developed many FOGs including Four-axis FOG, Small Four-axis FOG and FOG Integrated Navigation System. Three orthogonal gyros and a skew gyro compose the FOG, through redundancy configuration to enhance reliability of FOG, which has the characteristics of small volume, low consumption and light weight, which is suitable for medium and low orbit satellites. FOG Integrated Navigation System, composed of 3 FOGs and 3 quartz accelerometers, has the function of strap-down computation and integrated navigation, featured with high reliability and high precision, which can be used for navigation in the fields of aviation, aerospace and voyage, etc.
Four-axis FOG Small Four-axis FOG
Main Specifications of FOGs
Types Iterm |
Four-axis FOG |
Small Four-axis FOG |
Accuracy(°/h ) |
≤0.15 |
≤0.15 |
Measurement Range(°/s ) |
±10 |
-10~10 |
Dynamic Response Band(Hz) |
≥40 |
≥40 |
Power(V) |
+28 |
+28 |
Consumption(W) |
15 |
≤15 |
Dimension(mm) |
186×163×136 |
(191±2)×(186±2)×(94±2) |
Mass(kg) |
≤3 |
2.5 |
Main Specifications of FOG Integrated Navigation System
Qualification |
Unit |
Parameter |
|
Gyro |
Measurement range |
(°)/s |
> ±60 |
Threshold |
(°)/h |
< 0.02 |
|
Zero Bias Stability |
(°)/h |
< 0.02 |
|
Bias Repeatability |
(°)/h |
< 0.02 |
|
Scale Factor Nonlinearity |
ppm |
< 20 |
|
Scale Factor Asymmetry |
ppm |
< 50 |
|
Accelerometer |
Measurement range |
g |
±12 |
Zero Bias Stability |
g |
< 2.0×10-5 |
|
Bias Repeatability |
g |
< 3.7×10-5 |
|
Scale Factor Asymmetry |
- |
< 1.5×10-4 |
|
Scale Factor Repeatability |
ppm |
< 37 |
|
Navigation Precision |
/ |
1Nm/hr |
|
Consumption |
W |
Steady state:40W Startup:100W |
|
Mass |
kg |
10 |
|
Operation temperature range |
℃ |
-40~50 |
|
Vibration |
grms |
11.7 |
|
Shock |
g |
700 |
|
Interface |
|
RS-422/1553B |