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CEAS EuroGNC 2019

Nonlinear Disturbance Observer-Based Attitude Controller for Exoatmospheric DACS Type Missile Considering Seeker's Field-of-View Limit
Jaeho Lee Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
Seokwon Lee Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
Youdan Kim Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Republic of Korea
Abstract:
A nonlinear disturbance observer-based attitude controller is proposed for an exoatmospheric divert and attitude control system (DACS) type missile with a seeker's narrow field-of-view to maintain a lock-on condition. Dynamic model of the DACS type missile is derived considering varying center of mass caused by fuel consumption of the thrusters. Based on the separation between the translational and rotational motions of the missile in the exoatmospheric environment, attitude controller is designed based on the nominal missile dynamic model using the sliding mode control scheme. To compensate the effects of varying center of mass, the nonlinear disturbance observer for high-order disturbances is designed. Numerical simulation is performed considering the narrow field-of-view and varying center of mass to demonstrate the performance of the proposed controller.
Keywords: Missile autopilot; Nonlinear control; Nonlinear observer
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Jaeho Lee, Seokwon Lee, Youdan Kim: Nonlinear Disturbance Observer-Based Attitude Controller for Exoatmospheric DACS Type Missile Considering Seeker's Field-of-View Limit. Proceedings of the 2019 CEAS EuroGNC conference. Milan, Italy. April 2019. CEAS-GNC-2019-046.
BibTeX entry:

@Incollection{CEAS-GNC-2019-046,
    authors = {Lee, Jaeho and Lee, Seokwon and Kim, Youdan},
    title = {Nonlinear Disturbance Observer-Based Attitude Controller for Exoatmospheric {DACS} Type Missile Considering Seeker's Field-of-View Limit},
    booktitle = {Proceedings of the 2019 {CEAS EuroGNC} conference},
    address = {Milan, Italy},
    month = apr,
    year = {2019},
    note = {CEAS-GNC-2019-046}
}