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Medium Precision Inertial Navigation System

Medium Precision Inertial Navigation System

Introduction:
Medium precision inertial navigation system Medium precision inertial navigation system using triaxial fiber optic gyro sensitive vector angular motion;
the proportion of digital signal output with the carrier movement angular rate;
three orthogonal collocation of quartz flexure accelerometer...
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Medium precision inertial navigation system using triaxial fiber optic gyro sensitive vector angular motion, the proportion of digital signal output with the carrier movement angular rate; three orthogonal collocation of quartz flexure accelerometer gauge carrier sensitive linear acceleration, output with the proportion of current signal and current after I-F conversion circuit switching frequency signal input navigation computer. Computer navigation gyro, accelerometer, external data of GPS receiver, system error compensation calculation, navigation solution and to the provisions of the cycle guide through the monitoring port for external sending real-time speed, position, attitude and navigation information.

 

Medium Precision Inertial Navigation System

The initial alignment of Medium precision inertial navigation system is divided into two modes: static alignment and double position alignment. The position accuracy of the two position alignment is higher than that of the static alignment.


Medium precision inertial navigation system


Pure inertial mode

GNSS assisted navigation modeExternal receiver

Azimuth alignment accuracy

≤ 0.1° sec lat(1σ)

Azimuth alignment accuracy

≤ 0.1° sec lat(1σ)

Horizontal attitude alignment accuracy

≤ 0.02°(1σ)

Horizontal attitude alignment accuracy

≤ 0.02°(1σ)

Azimuth holding accuracy

0.05° /h

Azimuth holding accuracy

≤0.05°sec lat(1σ)

Horizontal attitude holding accuracy

0.03° /h

Horizontal attitude holding accuracy

≤ 0.01°(1σ)

Positioning accuracy(50%CEP)

≤ 2nm/h (10min Static alignment )

Positioning accuracy

≤ 5m(1σ)

Horizontal velocity precision(RMS)

≤ 2m/s (10min Static alignment )

Speed accuracy

≤ 0.1m/s(1σ)

Positioning accuracy(50%CEP)

≤ 1nm/h(Two   position alignment,Alignment time is less than 30min)

Horizontal velocity precision(RMS)

≤ 1m/s(Two position alignment,Alignment time is less than 30min)

Power and environment

Data measurement frequency

Maximum 100Hz

Power Supply

23~31V DC Power Supply,Nominal Supply Voltage27V

Power

Normal temperature steady-state power consumption is less than 17W, High and low temperature steady-state power consumption is less than 20W, Start transient power consumption is  
less than 50W

Working Temp

-40° C~+60°C

Storge Temp

-45° C~+80° C

Installment Dimension

180mm×180mm×160mm

Quality

﹤6kg

Fiber optic gyroscope index

Quartz accelerometer index

Time to Prepare≤ 15s

Measurement Range:-20g~+20g

Bias   Stability(the average time 100s)≤ 0.02 ° /h(1σ)

The Threshold   Value:≤ 5×10-6g

Bias repeatability(Stable environment,average time 100s)

Bias:≤6×10-3g

≤ 0.02 ° /h(1σ)

Scale Factor Repeatability:≤ 3.5×10-5(1σ)

Random Walk Coefficient≤  0.005° / √ Hz

Scale   Factor Temperature    Coefficient:≤ 6×10-5/° C(-40° C~+60° C)

Scale Factor Nonlinearity≤  50ppm

The Second Order Nonlinear Coefficient:≤ 3×10-5g/g2

Scale Factor  Repeatability≤ 50ppm(1σ)

Bias:≤ 6×10-3g

Gyro Measurement Range≥ ±300°  /s

Bias Repeatability:≤ 2.5×10-5g (1σ)

Bias Temp   Coefficient:≤ 2.5×10-5g/° C(-40° C ~ +60° C)

Band width:≥ 800Hz



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