Measuring the lateral acceleration does not sound like a major challenge. A DC coupled accelerometer in the center of gravity is frequently used for this purpose. Measuring lateral acceleration precisely presents a real challenge. Highly integrated gyro based systems are now available for vehicle testing. Up to 12 individual sensors are replaced by such systems. The installation is done in a few minutes and requires no external sensors attached to the vehicle. Results are provided in earth fixed coordinates. This enables direct comparison of key test parameters, especially true heading, vehicle pitch and roll angle, vehicle speed, vehicle location and acceleration in all three directions. A single test is enough to qualify a vehicle. Basics are explained and some real world test results are discussed. Other test requirements are even more demanding from the navigational side. Lateral deviation studies due to side wind require an extremely high positional resolution. In this case the internal GPS may be replaced by an external precision GPS/DGPS combination.
Measuring vehicle dynamics with a gyro based system
2003
7 Seiten, 14 Bilder, 6 Quellen
Conference paper
English
Measuring vehicle dynamics with a gyro based system
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