Research On Robust And Adaptive Attitude Control System Design Of Solid-propellant Ballistic Missile

The dissertation made a research on conventional project and adaptive project for attitude control system design of missile,and developed an integrated software of frequency-domain design and time-domain simulation based on the platform of MATLAB,against a background of attitude control system design and six-degree-of-freedom flight simulation of ballistic missile.In engineering practice,we generally adopt the conventional project of fixed-controller + gain-scheduling while designing the attitude control system of missile, in which the difficulty is the design of fixed-controller.The dissertation designed the fixed-controller with the popular H_∞robust control method and multiobjective evolutionary optimization method on the foundation of controlled plant model including flexible vibration. The example showed we could get a controller according with the demand basically by H_∞robust control method and the other one with better performance by multiobjective evolutionary optimization method.The conventional project may lead to a conservative result of attitude control system design to guaranteeing the robust stability of high frequency flexible vibration, and it is also hard to tune the controller.The dissertation realized the adaptive gain-stabilisation of flexure mode utilizing a notch filter with rank two,in which we made an on-line parameters estimation of mode frequency by extended kalman filter algorithm. This new project of adaptive notch filtering+gain-scheduling not only lowers the difficulty in designing attitude control system by conventional project,but avoids the conservative result.The dissertation developed a missile attitude control system computer aided design software (ACSCAD) on the platform of MATLAB that fulfilled the integration of frequency-domain design and time-domain simulation.ACSCAD raises the working efficiency,so the designer can devote to the research of new attitude control project with more energy.The dissertation supplies two design examples of attitude control system by ACSCAD that both meet the design indices,which shows the design assignment of attitude control system can be accomplished effectively by ACSCAD.