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The core inertial navigation of the LIMU-15 laser gyroscope inertial navigation system consists of a three-axis type 30 laser gyroscope combined with a three-axis quartz flexible accelerometer. It primarily includes: secondary power supply, navigational computer, current frequency conversion circuit, gyro control board, gyroscope, accelerometer, and mechanical structure. Key functions:

(1) can provide real-time information on location, heading, horizontal attitude, velocity, and angular velocity.；

(2) Under the condition that the guidance information is valid, initial alignment can be completed while in motion.

(3) Be of self-correction and data storage

(4) Coordinate systems can be aligned with other devices through parameter settings.

Principle technique performance and characteristics

a) Navigational System: Strap-down inertial navigation；

b) Preparing time: ≤8s(from power supply to self-checking)；

c) Time alignment:10min(Alternative for 5min,10min,15min)；

d) Alignment Methods: Self-alignment；

e) The Core Parts Accuracy:

1) Gyro-compass

Zero Bias Stability: ≤0.1°/h(1σ)；

Zero Bias Repeatability: ≤0.05°/h(1σ)；

Scale Factor Error:≤20ppm(1σ)；

Random Walk:≤0.02°/√h(1σ)；

Ranges:±1000°/s；

2) Accelerometer

Zero Bias Stability:≤5×10^-5 g(1σ)；

Zero Bias Repeatability:≤5×10^-5 g(1σ)；

Scale Factor Error:≤50ppm(1σ)；

Ranges:-30g~+30g；

f) Attitude Accuracy(Accuracy,Pure Inertial):

Heading: ≤0.4°secφ(1σ,1h)；

Attitude: ≤0.02°(1σ,1h)；

g) Pure Inertial navigation accuracy

Bearing Error:≤8 nautical miles/hour(At the worst condition)；≤3 nautical miles/hour (CEP50)；

h) Maxim Measurement Range

1) Pitch Angle:±90°；

Heading Angle:0～360°；

Roll Angle:±180°；

2) Pitch and heading angle velocity:±1000°/s；

3) Navigational data update rate: ≥100Hz；

i) Power Input Range: 24±2V；

j) Normal Operation Consumption: ≤15W；

k) Physical Parameters

1)Weight: ≤1.7kg；

2)Size:115 mm×115 mm×90mm；

l) Port Methods:1 RS-232,1 RS485 and1 RS-422.

m) Operation Temperature:-40℃～+70℃；

Image1 LIMU-15 Inertial Navigation System