Inertial Labs Railway Motion Control Unit (RMCU)
The Railway Motion Control Unit (RMCU) from Inertial Labs is a high-performance strapdown system that was developed for Railway applications in order to determine absolute orientation (Heading, Pitch and Roll) and parameters of motion (Angular Rates and Linear Accelerations) for any Railway Platforms on which it is mounted. Orientation is determined with high accuracy for both motionless and dynamic applications.
Description
Overview
The Inertial Labs RMCU utilizes 3-axis each of precision MEMS accelerometers, miniature Fluxgate magnetometers and MEMS gyroscopes to provide accurate Heading, Pitch and Roll of the device under measure. Integration of the gyroscopes’ output provides high frequency, real-time measurement of the device rotation throughout all three rotational axis. The accelerometers and Fluxgate magnetometer perform very accurate measurements in both static and dynamic conditions. They provide Pitch, Roll and Heading/Azimuth at RMCU initial alignment as well as ongoing corrections to gyroscopes during operation.
Development kits are available for the RMCU.
Features
- EN 45545, EN 50155 and EN 50011 Railway standards compliant solution
- One model with multiple configurations at an exceptional price performance ratio
- State-of-the-art algorithms for different Railway Platforms
- Highly accuracy miniature Fluxgate magnetometer
- Gyro-Stabilized Slaved Magnetic Heading
- Suitable for Trains Motion Control and Primary Attitude Reference
- Advanced Kalman Filter based sensor fusion algorithms
- Embedded 2D and 3D magnetic calibration on hard and soft iron
- All solid-state components (no moving parts)
- Full temperature calibration of all sensing elements
- Environmentally sealed (IP67)
- Compact design
Technical Specifications
| Heading | |
| Range: | 0 to 360 deg | Angular Resolution: | 0.01 deg |
| Static Accuracy in Temperature Range: | 0.3 deg |
| Dynamic Accuracy: | 0.6 deg RMS |
| Pitch and Roll | |
| Range Pitch, Roll: | ±90, ±180 deg |
| Angular Resolution: | 0.01 deg |
| Static Accuracy in Temperature Range: | 0.05 deg |
| Dynamic Accuracy: | 0.08 deg RMS |
| Gyroscopes | |
| Measurement Range: | ±450; ±950 deg/sec |
| Bandwidth: | 260 Hz |
| Bias In-run Stability (RMS, Allan Variance): | <4 deg/hr |
| Bias Residual Error in Temperature Range, RMS: | 180 deg/hr |
| SF Accuracy: | 0.3 % |
| Noise. Angular Random Walk (ARW): | 0.12 deg/√hr |
| Non-linearity: | 0.01 % |
| Axis Misalignment: | 0.15 mrad |
| Accelerometers | |
| Measurement Range: | ±8, ±15, ±40 g |
| Bandwidth: | 260 Hz |
| Bias In-run Stability (RMS, Allan Variance): | 0.005, 0.02, 0.03 mg |
| Bias Residual Error in Temperature Range, RMS: | 0.5, 0.7, 1.2 mg |
| SF Accuracy: | 150, 300, 500 ppm |
| Noise. Velocity Random Walk (VRW): | 0.015, 0.035, 0.05 m/sec/√hr |
| Non-linearity: | 0.015 % |
| Axis Misalignment: | 0.15 mrad |
| Magnetometers | |
| Measurement Range: | ±8.0 Gauss |
| Bias In-run Stability, RMS: | 8 μGauss |
| Noise Density, PSD: | 15 μGauss /√Hz |
| SF Accuracy: | 0.05 % |
| Physical/Electrical | |
| Size: | 129 mm × 53 mm × 49 mm |
| Weight: | 120 grams |
| Update Rate: | 1 – 4000 Hz (user settable) |
| Supply Voltage: | 3.3 to 7 VDC |
| Power Consumption: | 0.5 W |
| Output Interface: | RS-485 |
| Output Data Format: | Binary, NMEA ASCII |
| Environmental | |
| Operating Temperature: | -40 °C to +75 °C |
| Storage Temperature: | -50 °C to +85 °C |
| Operational Vibration: | 7g, 20 – 2000 Hz |
| Operational Shock: | 40g, 10 ms |
| MTBF: | 100,000 hours |
Warranty
Inertial Labs products are covered under their 15-month standard warranty. Inertial Labs will repair or replace products with design or manufacturing defects, for a period of 15 months from the date of purchase.
Why Buy from Us?
In business since 2004, Canal Geomatics is an authorized dealer for Inertial Labs and has established itself as an industry-leading distributor of high-precision positioning products in North America. Our mission is to find the best solution for each unique application and extend premium support to ensure the long-term success of our customers. We offer both volume and reseller discounts for the majority of our product lines.
Ordering
The Railway Motion Control Unit (RMCU) from Inertial Labs is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.
