ADIS16480 test conditions of Static and Dynamic Accuracy value

Hi Tzuyang,

Dynamic accuracy refers to the sensor’s ability to measure angles like yaw, pitch, and roll while in motion. The ADIS16480’s dynamic accuracy is characterized under specific test conditions that simulate real-world motion scenarios. Here’s a detailed overview of the conditions used during these tests (referenced here (1) ADIS16480 test conditions of Dynamic Accuracy value - Q&A - MEMS Inertial Sensors - EngineerZone (analog.com)):

• Sinusoidal Angular Rotation: The sensor is subjected to a smooth, oscillatory motion like a sine wave. This type of motion closely resembles the kinds of movements the sensor might experience in practical applications.
• Frequency and Cycles: The test involves rotating the sensor through four complete cycles at a frequency of 0.6 Hz, which means each cycle (back and forth) takes approximately 1.67 seconds. The relatively slow frequency allows for a detailed sensor response assessment.
• Amplitude: The motion covers a peak-to-peak angular range of 30 degrees. This means the sensor rotates 15 degrees from the center position in one direction, then 15 degrees in the opposite direction. Testing over this range ensures the sensor’s accuracy is evaluated across significant angular movements.
• Duration of Measurement: Data is collected over 10 seconds, long enough to encompass all four motion cycles. This duration provides sufficient data to assess the sensor’s performance accurately.
• Alignment and Motion Generation: The Device Under Test (DUT) is aligned directly with the axis of rotation to ensure the motion is accurately applied to the measured axis. The motion is generated using a motor, and the sensor is tested around both horizontal and vertical axes, which correspond to pitch, roll, and yaw measurements.
• Sampling Rate and Synchronization: The sensor samples data at 1200 samples per second (SPS) with no decimation (Decimation = 0). The data collection is synchronized with an external trigger, ensuring that all the measurements are perfectly aligned in time across the different axes.
• Error Analysis: After collecting approximately 10 seconds of data, the standard deviation of the error in angular position is calculated. This statistical measure reflects the sensor’s dynamic accuracy, showing how much the measured angular position deviates from the actual value during motion.

I hope this explanation helps. If you have any other questions, please let me know. 

thank you