Adaptive design for digital nonlinear autopilot of ship-to-ship missiles

Ki Hong Im; Dongkyoung Chaw; Jin Young Choi

doi:10.1117/12.664581

2 May 2006 Adaptive design for digital nonlinear autopilot of ship-to-ship missiles

Ki Hong Im, Dongkyoung Chaw, Jin Young Choi

Proceedings Volume 6042, ICMIT 2005: Control Systems and Robotics; 60420Y (2006) https://doi.org/10.1117/12.664581
Event: ICMIT 2005: Merchatronics, MEMS, and Smart Materials, 2005, Chongqing, China

Abstract

This paper proposes a practical design method for ship-to-ship missiles' autopilot. When the pre-designed analogue autopilot is implemented in digital way, they generally suffer from severe performance degradation and instability problem even for a sufficiently small sampling time. Also, aerodynamic uncertainties can affect the overall stability and this happens more severely when the nonlinear autopilot is digitally implemented. In order to realize a practical autopilot, two main issues, digital implementation problem and compensation for the aerodynamic uncertainties, are considered in this paper. MIMO (multi-input multi-output) nonlinear autopilot is presented first and the input and output of the missile are discretized for implementation. In this step, the discretization effect is compensated by designing an additional control input. Finally, we design a parameter adaptation law to compensate the control performance. Stability analysis and 6-DOF (degree-of-freedom) simulations are presented to verify the proposed adaptive autopilot.

Citation Download Citation

Ki Hong Im, Dongkyoung Chaw, and Jin Young Choi "Adaptive design for digital nonlinear autopilot of ship-to-ship missiles", Proc. SPIE 6042, ICMIT 2005: Control Systems and Robotics, 60420Y (2 May 2006); https://doi.org/10.1117/12.664581

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