Architectural elements of hybrid navigation systems for future space transportation
Autor: | Trigo, Guilherme Fragoso, Theil, Stephan |
---|---|
Rok vydání: | 2017 |
Předmět: |
Loosely coupled
0209 industrial biotechnology Engineering Inertial frame of reference Aerospace Engineering Launch vehicle navigation 02 engineering and technology Inertial navigation Fault detection and isolation 020901 industrial engineering & automation 0203 mechanical engineering Robustness (computer science) Electronic engineering Tightly coupled GNSS/INS navigation Inertial navigation system 020301 aerospace & aeronautics business.industry Pseudorange Navigation system Control engineering Space and Planetary Science GNSS applications Physics::Space Physics Navigations- und Regelungssysteme Error detection and correction business |
Zdroj: | CEAS Space Journal. 10:231-250 |
ISSN: | 1868-2510 1868-2502 |
DOI: | 10.1007/s12567-017-0187-z |
Popis: | The fundamental limitations of inertial navigation, currently employed by most launchers, have raised interest for GNSS-aided solutions. Combination of inertial measurements and GNSS outputs allows inertial calibration online, solving the issue of inertial drift. However, many challenges and design options unfold. In this work we analyse several architectural elements and design aspects of a hybrid GNSS/INS navigation system conceived for space transportation. The most fundamental architectural features such as coupling depth, modularity between filter and inertial propagation, and open-/closed-loop nature of the configuration, are discussed in the light of the envisaged application. Importance of the inertial propagation algorithm and sensor class in the overall system are investigated, being the handling of sensor errors and uncertainties that arise with lower grade sensory also considered. In terms of GNSS outputs we consider receiver solutions (position and velocity) and raw measurements (pseudorange, pseudorange-rate and time-difference carrier phase). Receiver clock error handling options and atmospheric error correction schemes for these measurements are analysed under flight conditions. System performance with different GNSS measurements is estimated through covariance analysis, being the differences between loose and tight coupling emphasized through partial outage simulation. Finally, we discuss options for filter algorithm robustness against non-linearities and system/measurement errors. A possible scheme for fault detection, isolation and recovery is also proposed. |
Databáze: | OpenAIRE |
Externí odkaz: |