IMU inertial system Motus

MEMSgyroscopicfor drone

Motus is an ultra-high accuracy MEMS inertial measurement unit (IMU) from Advanced Navigation that combines low SWaP-C (Size, Weight, Power, and Cost) and FOG-like performance. Motus features some of the highest accuracy MEMS accelerometers and gyroscopes combined with a sophisticated fusion algorithm. Its market-leading SWaP-C (Size, Weight, Power, and Cost) make it ideal for autonomous system applications. Motus is available in both OEM and rugged packages.

Key performance
Roll & Pitch: 0.05 °
Heading (Magnetic): 0.8 °
Bias Instability (gyro): 0.2 °/hr
Update Rate / Internal Filter Rate: 1000 Hz

Product description
Motus’s inertial performance exceeds some FOG IMUs and is up to 100x smaller. Motus is put through Advanced Navigation’s intensive calibration process to provide consistently accurate data over an extended temperature range of -40°C to 85°C.

Features

• Ultra‑high accuracy MEMS sensors and advanced fusion providing FOG‑comparable inertial performance.
• Miniature OEM and fully enclosed rugged package options (OEM: 34×39×24 mm, 26 g; Enclosed: 42×67×30 mm, 98 g).
• Advanced signal processing: synchronous 1000 Hz sampling via six individual 24bit differential ADCs and multiple regulated power rails for thermal stability.
• High update and output rates up to 1000 Hz for control of dynamic platforms.
• Enclosed version certified to IP67 and MIL‑STD‑810G; safety‑oriented real‑time OS and MIL‑STD hardware design.

Applications
UAV LiDAR
Gimbal Stabilization
Human motion tracking
Marine surveying and subsea navigation

Specifications — Navigation
Roll & Pitch Accuracy: 0.05 °
Heading Accuracy (magnetic): 0.8 °
Roll & Pitch Accuracy (external GNSS aided): 0.03 °
Heading Accuracy (external GNSS aided): 0.05 °
Horizontal Position Accuracy (external GNSS aided): 0.8 m
Vertical Position Accuracy (external GNSS aided): 1.5 m
Velocity Accuracy (external GNSS aided): 0.007 m/s
Orientation Range: Unlimited
Hot Start Time: 500 ms
Internal Filter Rate: 1000 Hz
Output Data Rate: Up to 1000 Hz

Specifications — Sensors
Accelerometers
Range: ±10 g
Bias Instability: 8 ug
Initial Bias: < 0.45 mg
Initial Scaling Error: < 0.03 %
Scale Factor Stability: < 0.04 %
Non‑linearity: < 0.05 %
Cross‑axis Alignment Error: < 0.05 °
Noise Density: 2 ug/√Hz
Bandwidth: 250 Hz

Gyroscopes
Range: ±475 °/s
Bias Instability: 0.2 °/hr
Initial Bias: < 3 °/hr
Initial Scaling Error: < 0.02 %
Scale Factor Stability: < 0.03 %
Non‑linearity: < 0.03 %
Cross‑axis Alignment Error: < 0.05 °
Noise Density: 6 °/hr/√Hz
Bandwidth: 200 Hz

Magnetometers
Range: ±8 G
Initial Scaling Error: < 0.07 %
Scale Factor Stability: < 0.09 %
Non‑linearity: < 0.08 %
Cross‑axis Alignment Error: < 0.05 °
Noise Density: 210 uG/√Hz
Bandwidth: 110 Hz

Communication
Interface (OEM): UART
Interface (Enclosed): RS232 (RS422 version available)
Speed: 4800 to 2M baud
Protocol: AN Packet Protocol or NMEA
Peripheral Interface: 2× GPIO and auxiliary RS232
GPIO Level: 5–20 V
GPIO Functions: 1PPS input, sensor sync I/O, odometer, stationary detect, air data input, NMEA I/O, NovAtel/Trimble GNSS inputs, AN Packet Protocol

Hardware
Operating Voltage (OEM): 4.5–5.5 V
Operating Voltage (Enclosed): 5–36 V
Input Protection (Enclosed): ±60 V
Power Consumption (Typical): 1.4 W
Hot Start Standby Duration: 48 hrs
Operating Temperature: −40 °C to 85 °C
Environmental Protection (Enclosed): IP67 / MIL‑STD‑810G
MTBF: 200,000 hrs
Shock Limit: 150 g, 6 ms, half sine
Vibration Limit: 8 g RMS
Dimensions (OEM): 34 × 39 × 24 mm
Dimensions (Enclosed): 42 × 67 × 30 mm
Weight (OEM): 26 g
Weight (Enclosed): 98 g