CEAS EuroGNC 2022
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Radar-Aided Inertial Navigation with Delayed Measurements
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| Marc Schneider |
Research Associate, University of Stuttgart, Institute of Flight Mechanics and Controls, 70569 Stuttgart, Germany. | | Walter Fichter |
Professor, University of Stuttgart, Institute of Flight Mechanics and Controls, 70569 Stuttgart, Germany. |
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| Abstract:
A key requirement for orienting the seeker head of a guided missile towards the target is the knowledge about the missile's position and attitude. An inertial measurement unit determines the specific forces and the angular rates of the vehicle. This so-called inertial navigation, which integrates the angular rates and accelerations, is not sufficient for long-range interceptors due to initialization errors and sensor drift. Therefore, a navigation algorithm is proposed that fuses the inertial measurements with the measurements of the interceptor from the fire-control radar via a Multiplicative Extended Kalman filter. Compared to existing approaches, this navigation algorithm accounts for the delays in the transmission of the radar measurements. Monte Carlo simulations show that the proposed navigation algorithm improves the estimation accuracy of the position and attitude, and thus improves the predictions of the line-of-sight. This allows the seeker head to lock on to the target, setting the foundation for a successful interception. A sensitivity study proves the robustness of the algorithm to various sources of error.
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| Keywords: Missile; Navigation; Radar; IMU; Sensor Fusion; Kalman Filter; Measurement Delay |
 View PDF CEAS-GNC-2022-047 |
| Marc Schneider, Walter Fichter: Radar-Aided Inertial Navigation with Delayed Measurements. Proceedings of the 2022 CEAS EuroGNC conference. Berlin, Germany. May 2022. CEAS-GNC-2022-047.
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| BibTeX entry:
@Incollection{CEAS-GNC-2022-047,
authors = {Schneider, Marc and Fichter, Walter},
title = {Radar-Aided Inertial Navigation with Delayed Measurements},
booktitle = {Proceedings of the 2022 {CEAS EuroGNC} conference},
address = {Berlin, Germany},
month = may,
year = {2022},
note = {CEAS-GNC-2022-047}
}
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