INT-D-M4 Maritime Laser INS | High-Accuracy Laser Gyro Quartz Accelerometer Integrated Navigation System

Product Description

The Dubhe-M4 Laser Inertial Navigation System (INS-M Series) utilizes a laser gyroscope and quartz accelerometer as its core inertial sensors. Based on a mature strapdown inertial architecture, the system runs high-speed navigation algorithms internally to compute and output navigation information in real time. It supports multiple operating modes including inertial autonomous navigation and inertial/GNSS combined navigation, enabling reliable heading, attitude, speed, and positioning output for maritime platforms.

Designed for high-precision marine integrated navigation system applications, the Dubhe-4 meets the requirements of vessels and unmanned platforms that require stable and good-quality guidance performance. As an experienced INS guidance system provider and manufacturer, the Dubhe product family supports long-term deployment in complex marine environments.

 Key Advantages

• High-precision laser gyro + quartz accelerometer inertial sensing
• Real-time navigation computation with strapdown INS processing
• Multi-mode operation: inertial autonomous / INS + GNSS / INS + DVL
• High accuracy heading, roll, pitch, speed, and position outputs
• Supports GNSS-aided guidance for maritime applications
• Suitable for vessels with strong vibration, motion, and environmental variations
• Fast startup and alignment with high reliability

Application Fields

• Naval vessels & surface ships
• USV/UUV platforms
• Maritime INS navigation systems
• GNSS-aided guidance systems
• Underwater navigation & positioning
• Aquatic autonomous vehicle control

Series		Maritime Inertial Navigation System(INS-M)
Type		Dubhe-M4
Accelerometer	Months Bias Repeatability(1σ)	≤30μg
	Months Scale Factor Accuracy(1σ)	≤30ppm
Gyro	Bias Repeatability(1σ)	≤0.003°/hr
	Scale Factor Accuracy(1σ)	≤3ppm
	Random walk(1σ)	≤0.001°/√hr
Features	Angular Rate	≥±400°/sec
	Angular Acceleration	100000°/sec2
	Acceleration	＞25g
	Speed accuracy(Pure inertia)	≤1.0kn,RMS
	Speed accuracy(GNSS combination)	≤0.4kn,RMS
	Angular Attitude	Any Orientation
	Startup time	≤10sec
	Input/output	3 RS422 full-duplex serial ports, 1 100M Ethernet port
Alignment time		≤15min
Position accuracy	Pure inertia	≤1nm/4h,CEP
	INS/DVL Combination	≤0.3%D,RMS
	INS/GNSS Combination	better than satellite accuracy
Heading Accuracy	Pure inertia	≤0.02°sec(L),RMS
	INS/GNSS combination	≤0.01°,RMS
Pitch & Roll Accuracy	Pure inertia	≤0.01°,RMS
	INS/GNSS combination	≤0.01°,RMS
Characteristics	Power consumption	＜30W
	Dimensions(Lmm×Wmm×Hmm)	232×186×160
	Weight	＜8kg
	Temperature	-40℃~60℃
	Shock	15g,Half-sine wave 11ms
	Input Voltage	DC24V(±25%)
	cooling	Conduction to mounting plate
	Vibration	20~2000Hz,6.06g
	MTBF	＞20000 hours