HomeADMA GNSS/inertial systemADMA-G: Pro+/ Eco+/ Eco for Automotive/Railway

ADMA-G: GNSS/inertial reference system for vehicle dynamics testing

The Automotive Dynamic Motion Analyzer (ADMA) is more than just a GNSS/Inertial Navigation System and has been specially developed for vehicle dynamics measurements in the automotive sector. Equipped with DGNSS (Differential Global Navigation Satellite System) and fiber optic gyroscopes, this highly accurate Inertial Navigation System (INS) defines new standards for vehicle dynamics applications in the automotive sector. Our inertial reference track system ADMA allows for constant measurement of acceleration, speed and position of moving vehicles in all three dimensional axes. Pitch, roll and course angles can be continuously and precisely measured with ADMA as well as course and side-slip angles as well as angular rates.

This makes the GeneSys’ ADMA inertial measurement unit (IMU) the best choice among inertial reference systems where challenging measurements with maximum accuracies are required.

Technical data of ADMA-G-PRO+, ADMA-G-ECO+, and ADMA-G-ECO can be found in the tables below or in the datasheet.

GeneSys’ inertial reference systems at a glance

Overview of key data for ADMA-G variants, the GeneSys' inertial reference system

Applications with inertial reference system ADMA

The strap-down technology ensures that the inertial reference system ADMA is stable and resistant to unwanted vibration during use. This means the ADMA is very well suited for evaluation of Vehicle Dynamics and Driver Assistance Systems. The ADMA system is successfully used for Motorsports, Driver-less Systems, and Construction Machines. It is proven itself in the areas of Route, Track Wear, and Railway measurements.

ADMA Features

  • Measurement of vehicle motion in three axes, even during GNSS signal loss
  • Dynamic attitude and heading angle determination
  • Precise acceleration, speed, and position data due to extended Kalman filter
  • Precise position data with integrated WAAS/EGNOS-DGNSS receiver (<1m)
  • High precision position data (1 cm) with internal RTK2 DGNSS receiver and GNSS Base Station
  • Robust inertial sensors and strap-down technology without moving parts

Highlights inertial reference systems ADMA-G

  • Data output rate up to 1000 Hz
  • Data output via 5 CAN bus interfaces and Ethernet
  • Configuration via Ethernet
  • Forwarding of GNSS correction data and relative data calculation (e.g. distance) via WiFi in real-time for multi-vehicle operation
  • GNSS synchronized DAQ synchronization signal, the high clock frequency
  • Inputs for the recording of analog signals
  • The output of GNSS raw data via Ethernet interface
  • Indoor GNSS interface
  • Dual GNSS antenna option
  • Data latency < 1 ms
  • Compatible with all common steering and driving robots

Inertial navigation systems for any requirements

The models of the inertial reference system ADMA-G differ in the performance of the applied inertial sensors. Higher precision sensors are less sensitive to GNSS interferences or outages. All models are available with variable GNSS accuracy, ranging from simple L1 receivers with meter accuracy to L1/L2 RTK receivers with centimeter accuracy. Our gyro systems do not require an export license.

ADMA-options – extending capabilities

ADMA3.5’s new generation IMUs cater to evolving customer needs with enhanced usability and productivity. Activate add-on functions seamlessly with a license key, ensuring hardware remains unaltered for utmost flexibility.

Overview ADMA-Options and Add-Ons

Technical data of ADMA-G: GNSS inertial reference system


GNSS constellationsGPS L1, L2
BeiDou*1 B1, B2
Galileo*1 E1, E5
Dual antennaOptional
Position accuracy (1σ)*20.01 / 0.20 / 0.60 / 1.20 / 1.50 m
Angle Measurement range roll / pitch / yaw60 ° / 60 ° / ± 180 °
Angle Measurement accuracy roll & pitch (1 σ) / yaw (1 σ) / sideslip (RMS)0.01 / 0.015 / 0.05 °
Angle resolution0.005 °
Velocity accuracy (RMS)*30.03 km/h
Position error after 10 / 30 / 60 sec
GNSS outage (RMS)*3
0.1 / 0.6 / 2.0 m
Velocity error after 10 / 30 / 60 sec
GNSS outage (RMS)*3
0.01 / 0.03 / 0.06 m/sec
Roll / Pitch angle error after 10 / 30 / 60 sec
GNSS outage (RMS)*3
< 0.01 / 0.01 / 0.01 °
Heading angle error after 10 / 30 / 60 sec
GNSS outage (RMS)*3
< 0.01 / 0.01 / 0.01 °
Braking distance accuracy without RTK2 (RMS)*30.05 m
Data output rate50 / 100 / 200 / 250 / 500 Hz / (1000 Hz)*1
Calculation latency1 msec
Sensor Technology3 closed-loop fiber optic gyros
Measurement range± 327 °/s
Data output resolution0.0001 °/s
Bias repeatability typ. (1 σ)6 °/h (0.0017 °/s), optional 1 °/h (0.00028 °/s)
In-run-bias typically0.1 °/h
Noise (random walk) typ.0.047 °/√h
Scale factor 0.05 %
Sensor bandwidth3200 Hz
Sensor Technology3 servo accelerometers
Measurement range± 5 g / (± 10 g)*1
Data output resolution0.0001 g
Bias repeatability typ.< 1.0 mg
In-run-bias typ. (1 σ)10 µg 
Noise (random walk) typ.< 50 µg /√Hz
Scale factor (1 σ)0.015%
Sensor bandwidth1500 Hz
Ethernet2x 1 GBit
Data input/output, configuration and firmware
update, driving robot data output, optional for
relative data calculation and DGNSS routing.
1x 100 MBit GNSS Receiver; GNSS firmware update
CAN1x CAN, 5x CAN*1, 2b, 1 Mbit
Data output, input*1
Serial1x RS232 GNSS Receiver; DGNSS correction data input
1x RS232 GNSS Receiver; GPGGA Log output,
IPS (Indoor Positioning System)
Digital/Analog Input4x Digital / Analog (16 bit) e.g. Frequency, Brake trigger, …
1x Digital / Analog (16 bit) external velocity X
Digital Output4x Digital  TTL e.g. PPS, Frequency, PPD Pulse per distance, …
Connector typeLemo
GNSS Antenna connectors
Ordering Variants
Internal Memoryup to 64 GB
Power supply9 to 32 VDC typ. 30 W
Dimensions (W x L x H)110 x 170 x 197 mm
Weight3.6 kg
Operating temperature-20 to +60 °C
*1 Optional

*2 Depending on GNSS conditions, correction data and license model

*3 Typical values according to internal test standards with settled Kalman filter.