Inertial Measurement Units (IMU/INS)
Inertial Measurement Units are very advanced systems which combine accelerometers, gyroscopes and a high speed processing unit. Their high dynamic range (up to several kHz) makes them suitable for a variety of operating fields. An additional advantage is their resistance against external disturbances. A major disadvantage is their short term accuracy. The multiple integration of the sensor data leads to a tremendous growth of the navigation-errors. This characteristic is complementary to Global Satellite Navigation Systems (GPS/GLONASS/GALILEO). Thus in practical applications multisensor navigation systems are used. An additional improvement can be achieved by processing the sensor raw data with error compensation algorithms.
The Inertial Measurement Unit developed at the ITE combines tactical grade inertial sensors with a 32 bit floating point Digital Signal Processor to compensate bias-, scale-factor-, an misalignment-errors at runtime. Furthermore the ITE-IMU provides a special synchronisation option in combination with a Global Satellite Navigation Systems.
Inertial Sensor Integration and Calibration
The IMU calibration lab at the ITE provides measurement equipment to determine IMU performance parameters like e. g.:
- Scale factor and Bias
- Noise and drift rates
We have also the ability to develop and produce mechanical parts or electronic circuit boards at our facilities. The close interconnection between mechanical and electronic design departments led to an optimized IMU-carrier with regard to weight, stability, size and performance.