A method of designing a bank-to-turn(BTT) flight control system of unmanned aerial vehi?cle (UAV) was studied to solve the problems cause by kinematics coupling, aerodynamic nonlinearity and parameter uncertainty. The zero dynamic system of nonlinear motion of BTT was adjusted for sta?bility augmentation by the quadratic optimum adjustment law; the nonlinear system of BTT was pro?cessed linearly by the precision feedback linearization method; the control law of BTT was designed by a sliding mode variable structure control method to obtain the BTT flight control system with nonlin?earity and robustness. The performance of the control system was analyzed by the digital simulation based on U/vV six-freedom nonlinearly dynamic and kinematic model. The simulated results show that the control system can meet the needs of accuracy and robustness under the condition of perturbation.
Key words
automatic control technique /
unmanned aerial vehicle /
bank-to-turn /
feedback lineariza?tion /
zero dynamics /
robustness
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