Multi-Position Continuous Rotate-Stop Fast Temperature Parameters Estimation Method of Flexible Pendulum Accelerometer Triads

Abstract The temperature cycling test is always carried out in thermal calibration scheme of the inertial navigation systems, in which the temperature-stabilization chamber is quite needed. The temperature cycling test can provide full temperature parameters of the accelerometer and gyro triads, but it also requires complex operation procedures and expensive test instruments. A fast estimation method using multi-position continuous rotate-stop data is proposed here to estimate temperature parameters of the accelerometers. The calibration off-line data can be obtained from the systematic calibration experiment, which means no additional temperature experiment is needed. The method can be easily extended to apply in full temperature range through interpolation of the temperature parameters. At last, the systematic calibration tests verified that the repeatability of the estimation result of error parameters of the inertial sensors can be greatly improved, and land vehicular tests verified that the horizontal positioning precision can be greatly improved.