Method for calibrating accelerometer for inertial navigation on centrifugal machine based on total error analysis

• Main Authors: WANG CHANGHONG, LEE YEONHEE, REN SHUNQING, LYU WEIFENG
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2022
• Subjects: INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MEASURING; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; PHYSICS; TESTING

The invention relates to an inertial navigation technology, and discloses a method for calibrating an inertial navigation accelerometer on a centrifugal machine based on total error analysis. The method comprises the following steps of: determining a pose matrix among coordinate systems of the centrifugal machine according to each error source of the centrifugal machine and each established coordinate system; when the main shaft of the centrifugal machine works at a uniform angular rate, determining the specific force input of the accelerometer according to the pose matrix among the coordinate systems of the centrifugal machine; substituting the specific force input of the accelerometer into a preset error model of the accelerometer to obtain indication output of the accelerometer; calibrating a model coefficient of the error model by using a Fourier series method; identifying a model coefficient of the error model by using different uniform angular rates of the main shaft; and calculating the test uncertaint