ACCOUNTING FOR SPATIAL OFFSETS OF ACCELEROMETER PROOF MASSES IN AN INERTIAL MEASUREMENT UNIT CALIBRATION ON A LOW-GRADE TURNTABLE
The paper discusses the calibration of an assembled strapdown inertial measurement unit (IMU) using a low-grade single-axis turntable. Additional mathematical models complement the method described in previous papers in order to take into account the spatial offsets of accelerometers' proof masses. The displacement of the IMU relative to the rotation axis is being under consideration also. These novations allow improving the accuracy of calibration while the requirements for calibration experiments become simpler. Some results of experimental data processing and numerical simulations complete the study.