RMCU

The Railway Motion Control Unit - RMCU is a high-performance strapdown system that was developed for Railway application 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.

The Inertial Labs RMCU utilizes 3-axes 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 gyroscopes’ output provides high frequency, real-time measurement of the device rotation about all three rotational axes.

Accelerometers and Fluxgate magnetometer measure absolute, very accurate in static and dynamic conditions Pitch, Roll and Heading/Azimuth at RMCU initial alignment as well as providing ongoing corrections to gyroscopes during operation.

Parameter

Heading static accuracy, RMS: 0.3 deg
Heading dynamic accuracy in temperature range, RMS: 0.6 deg
Pitch & Roll static accuracy, RMS: 0.05 deg
Pitch & Roll dynamic accuracy in temperature range, RMS: 0.08 deg
Dimensions: 129 × 53 × 49 mm
Weight: 120 grams
Interface: RS-485 / Ethernet
 

KEY FEATURES AND FUNCTIONALITY

• 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 sea

One of the key elements to the success of Inertial Labs RMCU is its use of mini Fluxgate Magnetometers, which has distinct advantages over commonly used magneto-inductive or magneto-resistive magnetometers.

In operation over time and temperature fluxgate magnetometers have superior stability and repeatability. In terms of sensitivity, fluxgate magnetometers provide up to two orders of magnitude increased sensitivity.

In addition to the performance advantages, unlike the chip-level magnetometer technology, fluxgate magnetometer technology has been depended on for over 70 years to provide an accurate reference to North. It remains the most reliable magnetic sensor technology for determining an object’s heading.