Lee, Jaeho (Seoul National University), Lee, Seokwon (Seoul National University), Kim, Youdan (Seoul National University)

Nonlinear Disturbance Observer-Based Attitude Controller for Exoatmospheric DACS Type Missile Considering Seeker's Field-of-View Limit

Scheduled for presentation during the Regular Session "Missiles" (ThA2), Thursday, April 4, 2019, 15:00−15:30, BL281.1

5th CEAS Conference on Guidance, Navigation and Control, April 3-5, 2019, Milano, Italy

This information is tentative and subject to change. Compiled on April 25, 2024

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.