| MH-JG111D uniaxial laser gyro (RLG) |
MH-JG111D uniaxial laser gyro (RLG)
MH has developed a ring laser gyro (RLG) marine inertial navigation system (INS) which provides improved performance and reliability compared to the-current Navy standard which uses a gimbaled inertial measuring unit (IMU) with gas bearing gyros. Since MH has already provided over 2000 Navy -standard systems, the new RLG IMU was designed to be completely -compatible with the mechanical and electrical characteristics of the standard system enclosure. It can easily be retrofitted into existing shipboard installations without disturbing the enclosure mounting position. Appropriate engineering tradeoffs were made in the design of the RLG IMU to balance the sometimes conflicting factors of performance, reliability, cost, and environmental isolation. An engineering prototype of the system has been built and tested. Steps taken to isolate the instruments from environmental influences are described. The relationship between system design and reliability/maintainability is discussed.
Ring laser gyro (RLG) is the most important components of inertial navigaion system.
Characterized
by digitization and high precision, Laser Gyro (RLG) is developed independently
according
to inertial application. Digital output is easily made without need
of auxiliary circuit. It is pretty convenient, more
reliable, highly adaptable to environment.
（1）Main Characters
As
its digital output, it is convenient.
The
service life is more than 100,000 hours with high
levels of reliability.
It
can work with low operating voltage (5~8VDC) and small power
consumption.
With
strong shock resistance ability, it is highly adaptable to environment.
（2）Main Applications
It is suitable for vehicle and airborne
based position and azimuth determining system, inertial navigation system(INS),
high precision gyro-based north seeker, attitude measurement
system, high-speed rail measurement system, road deflection
measurement system. Due to its excellent technology, it can protect
against larger shock environment and specially be applied in particular environment.
|
NO.
|
ITEM RLG
|
Accuracy Levels
|
NOTES
|
|
Class T
|
Class A
|
Class B
|
|
1
|
Constan
t Bias
|
≦±0.5°/h
|
≦±0.5°/h
|
≦±0.5°/h
|
1σ
|
|
2
|
Zer
o Bias
Stability
|
≦0.010°/h
|
≦0.015°/h
|
≦0.020°/h
|
1σ
|
|
3
|
Bia
s
Repeatability
|
≦0.010°/h
|
≦0.015°/h
|
≦0.020°/h
|
1σ
|
|
4
|
Radom Walk
Coefficient
|
≦0.002
°√/h
|
≦0.003°
√/h
|
≦0.005°√/h
|
1σ
|
|
5
|
Scale Facto
r Nonlinearity
|
≦2ppm
|
≦5ppm
|
≦10ppm
|
1σ
|
|
6
|
Scale Facto
r
Repeatability
|
≦2ppm
|
≦5ppm
|
≦10ppm
|
|
|
7
|
Measurement
Range of
Angular
Velocity
|
≦±300°/s
|
|
|
8
|
Outpu
t Angle
Increment
|
0.58″/Pulse
|
|
|
9
|
Startup Time
|
<10s
|
|
|
10
|
Operating
Temperature
|
-40°C~70°C
|
|
|
11
|
Impact Force
|
30g
|
|
|
12
|
Volume
|
125mmX111m
mX85mm
|
|
|
13
|
Weight
|
≦2kg
|
|
|
14
|
Power
Supply
|
±5V, ±12V,
±45V, ±15V
|
|
|
15
|
Interface
|
RS422
|
|
|
16
|
Data
Refresh Rate
|
400Hz
|
|
|
17
|
Baud Rate
|
115200bps
|
|
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