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BTT autopilot design for agile missiles with aerodynamic uncer tainty
Author(s): 
Pages: 802-812
Year: Issue:  4
Journal: Journal of Systems Engineering and Electronics

Keyword:  agile missileautopilothigh angle of attackactive dis-turbance rejection control (ADRC)dynamic surface control (DSC)extended state observer (ESO);
Abstract: The approach to the synthesis of autopilot with aerody-namic uncertainty is investigated in order to achieve large maneu-verability of agile missiles. The dynamics of the agile missile with reaction-jet control system (RCS) are presented. Subsequently, the cascade control scheme based on the bank-to-turn (BTT) steering technique is described. To address the aerodynamic un-certainties encountered by the control system, the active distur-bance rejection control (ADRC) method is introduced in the autopi-lot design. Furthermore, a compound control er, using extended state observer (ESO) to online estimate system uncertainties and calculate derivative of command signals, is designed based on dynamic surface control (DSC). Nonlinear simulation results show the feasibility of the proposed approach and validate the robust-ness of the control er with severe unmodeled dynamics.
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