| Title |
A Study on the Design of Correction Filter for High-Speed Guided Missile Firing from Warship after Transfer Alignment |
| Authors |
김천중(Cheon-Joong Kim) ; 이인섭(In-Seop Lee) ; 오주현(Ju-Hyun Oh) ; 유해성(Hae-Sung Yu) ; 박흥원(Heung-Won Park) |
| DOI |
http://doi.org/10.5370/KIEE.2019.68.1.108 |
| Keywords |
Correction filter ; Transfer alignment ; High-speed guided missile ; Kalman filter ; Adaptive filter ; Multiple model adaptive estimation |
| Abstract |
This paper presents the study results on the design of the correction filter to improve the azimuth error estimation of the high-speed guided missile launched from the warship after the transfer alignment. We theoretically proved that the transfer alignment performance is determined by the accuracy of the marine inertial navigation system and the observability of the attitude error state variable in the transfer alignment filter, and that most of navigation errors in high-speed guided missile are caused by azimuth error. In order to improve the azimuth estimation performance of the correction filter, the multiple adaptive estimation method and the adaptive filters adapting the measurement noise covariance or the process noise covariance are proposed. The azimuth estimation performance of the proposed adaptive filter and the existing Kalman filter are compared and analyzed each other for 8 different transfer alignment accuracy cases. As a result of comparison and analysis, it was confirmed that the adaptive filter adapting the process noise covariance has the best azimuth estimation performance. These results can be applied to the design of correction filters for high-speed guided missile. |