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Simultaneous State and Disturbance Estimation for Seeker System using Sliding Modes
Bhagyashri Tamhane,Shailaja Kurode,Prasad Parkhi,Dharmveer 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
In this paper simultaneous estimation of states and disturbance for seeker system of a missile using sliding mode observer (SMO) has been proposed. The modeling of the plant is done by classical method and the complete seeker system has been simulated for generation of spiral scan loop with control input provided by a simple state feedback controller. An extended state observer using sliding modes is designed to estimate the system states and the total lumped disturbances acting on the system. The estimated disturbance takes into account the disturbance due to cross coupling in the gimbal system and externally added sinusoidal disturbance in input channel. Simulations verify that the output estimation error is made zero in finite time due to sliding modes and the estimated disturbance is in close agreement with actual disturbance.
Robust Control for Seeker Scan Loop using Sliding Modes
Dharmveer,Shailaja Kurode,Prasad Parkhi,Bhagyashri Tamhane 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
This paper presents robust control of seeker system used in missile target scanning and tracking. The mathematical model for seeker system is considered. A sliding mode controller (SMC) is designed to compensate uncertain coupling effect and external disturbances during scan phase. The model of the plant is based on first-principle method. The dynamic equations of motion are formulated with the assumption that the seeker system is a rigid body with no mass imbalance. These equations of motion are considered in cascade with DC motor equations which provides the actuating torque to the gimbal axes of the seeker system. The performance of the controller is validated in simulations.