IEEE Std 528-2019 pdf download – IEEE Standard for Inertial Sensor Terminology.
1.2 Purpose There is no consistent definition of terms that have arisen in the evolution of inertial instruments. This standard is intended to serve as a basic reference for producers and users of such instruments, for preparing industry standards, and for the interpretation of published technical reports. 2. Definitions For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause. 1 acceleration-insensitive drift rate (gyro): The component of environmentally sensitive drift rate not correlated with acceleration. NOTE—Acceleration-insensitive drift rate includes the effects of temperature, magnetic, and other external influences. 2 acceleration random walk (accelerometer): See: random walk (acceleration random walk). acceleration-sensitive drift rate (gyro): The components of systematic drift rate correlated with the first power of a linear acceleration component, expressed as (rad/s)/(m/s2) in SI units.
acceleration-squared-sensitive drift rate (gyro): The components of systematic drift rate correlated with either the second power of a linear acceleration component or the product of two linear acceleration components, expressed as (rad/s)/(m/s 2 ) 2 in SI units. 4 accelerometer: An inertial sensor that measures linear or angular acceleration. Except where specifically stated, the term accelerometer refers to linear accelerometer. See: angular accelerometer; linear accelerometer. activation time (gyro, accelerometer): See: turn-on time. activity dip (vibrating beam accelerometer): The phenomenon where, at certain frequencies, the resonator vibration amplitude decreases due to parasitic resonances within itself or with the surrounding structure. alignment (gyro, accelerometer): See: input-axis misalignment. Allan variance: A characterization of the noise and other processes in a time series of data as a function of averaging time. It is one half the mean value of the square of the difference of adjacent time averages from a time series as a function of averaging time. angle random walk (gyro): See: random walk (angle random walk). angular acceleration sensitivity: (A) (accelerometer) The change of output (divided by the scale factor) of a linear accelerometer that is produced per unit of angular acceleration input about a specified axis, excluding that response which is due to linear acceleration. (B) (gyro) The ratio of drift rate due to angular acceleration about a gyro axis to the angular acceleration causing it. NOTE—In single-degree-of-freedom gyros, it is nominally equal to the effective moment of inertia of the gimbal assembly divided by the angular momentum.