What is the function of gyro-torquing in an inertial navigation system (INS)?

The function of gyro-torquing in an inertial navigation system (INS) is primarily to maintain the platform horizontal and aligned. In an INS, the gyroscopes measure the angular rate of rotation and, through gyro-torquing, adjustments are made to ensure that the system remains level and accurately aligned with the inertial reference frame. This alignment is crucial because it allows the INS to provide precise information regarding the position, velocity, and orientation of the vehicle. If the platform were to drift or misalign, the navigation computations would be jeopardized, leading to errors in determining the vehicle's position and trajectory. Keeping the platform stable and correctly oriented ensures that the data gathered by the INS is reliable, which is essential for various applications in aviation, spacecraft, and other areas where navigation accuracy is critical.