What happens to INS if it loses velocity input?

• A. It becomes undamped
• B. It stabilizes
• C. It recalibrates
• D. It accelerates

Answer: (A)

When an Inertial Navigation System (INS) loses velocity input, it becomes undamped. In this context, being "undamped" means that the system loses its ability to stabilize itself through the feedback mechanisms that normally rely on velocity data. The velocity information is critical for the INS to accurately compute its position and orientation over time. Without this input, the calculations become increasingly inaccurate, leading to potential drift in the system's output.

The stabilization process of an INS normally relies on feedback loops that adjust the internal calculations based on the measured velocity. If these inputs are removed or fail, the system can no longer correct for errors as effectively, which means that it cannot dampen or minimize oscillations in the readings. Consequently, this lack of damping can lead to greater errors and deviations in navigation, hence making the system undamped.

Understanding the importance of velocity inputs helps clarify how critical it is for the proper functioning of an INS. In contrast, other options such as stabilizing or recalibrating do not occur if velocity inputs are lost. Instead, the system's output can fluctuate uncontrollably due to the absence of necessary data, which aligns with the concept of becoming undamped. Acceleration, on the other hand, doesn't directly correlate with the