Predictive Modeling in AUV Navigation: A Perspective from Kalman Filtering

Abstract

We present a safety-oriented framework for autonomous underwater vehicles (AUVs) that improves localization accuracy, enhances trajectory prediction, and supports efficient search operations during communication loss. Acoustic signals emitted by the AUV are detected by a network of fixed buoys, which compute Time-Difference-of-Arrival (TDOA) range-difference measurements serving as position observations. These observations are subsequently fused with a Kalman-based prediction model to obtain continuous, noise-robust state estimates. The combined method achieves significantly better localization precision and trajectory stability than TDOA-only baselines. Beyond real-time tracking, our framework offers targeted search-and-recovery capability by predicting post-disconnection motion and explicitly modeling uncertainty growth. The search module differentiates between continued navigation and propulsion failure, allowing search resources to be deployed toward the most probable recovery region. Our framework fuses multi-buoy acoustic data with Kalman filtering and uncertainty propagation to maintain navigation accuracy and yield robust search-region definitions during communication loss.

Figures (9)

• Figure 1: Illustration of the TDOA-based localization system. The submersible emits acoustic signals received by multiple buoys at different times, from which the travel time differences are used to estimate its position.
• Figure 2: Mechanical interpretation of the submersible motion under combined engine and ocean-current accelerations.
• Figure 3: Illustration of the search process under communication loss. The predicted trajectory (red) is generated by the Kalman filter, while the blue curve denotes the true motion. The shaded circles illustrate the evolving search regions under different operating conditions.
• Figure 4: Localization results for 1000 test points. Blue circles denote true positions; yellow markers represent TDOA estimates.
• Figure 5: Cumulative Distribution Function (CDF) of Mean Absolute Error (MAE) for Submarine Localization. The CDF curve illustrates the probability that the localization error is less than or equal to a given MAE threshold. Nearly all test points have errors below 4 m, demonstrating high localization accuracy.