In the context of gyroscopes, accelerometers, and inertial navigation systems (INS), Cumulative Error refers to the growing error that builds up over time due to small inaccuracies in the measurements of these sensors.
Así es como funciona:
- Gyroscope and Accelerometer Measurements:
- Gyroscopes measure rotation (how much the system turns).
- Accelerometers measure acceleration (how fast the system is speeding up or slowing down).
- Small Errors: Both sensors have small errors in their measurements, such as tiny shifts or noise. Even though these errors are small at first, they add up over time.
- Building Over Time:
- As the system keeps running, the small errors in rotation and acceleration accumulate and become bigger. For example, a tiny error in the gyroscope’s rotation measurement could cause a small drift in direction, and a small error in the accelerometer’s speed measurement could cause a small shift in position.
- Over time, these tiny errors stack up, leading to a Cumulative Error in the system’s overall estimate of position, velocity, or heading.
Por qué es importante:
Cumulative Error is important because it can cause the system to become less accurate as time goes on. In an inertial navigation system, the longer the system operates without correction (such as from GPS), the larger the Cumulative Error becomes. This means the system could start giving less reliable results, which is why regular updates or corrections are needed to keep the navigation accurate.
