This paper presents a constrained control strategy for the hypersonic vehicle with actuator amplitude,rate constraints and aerodynamic uncertainties.First,a vehicle-actuator control model is derived in consideration of actuator dynamics properties explicitly.Second,a nonlinear disturbance observer is designed to estimate the aerodynamic uncertainties,and then an adaptive backstepping control technique is adopted with a modified first-order-filter to eliminate the“explosion of terms”problem.Next,for handling the actuator amplitude and rate constraints,a novel auxiliary compensation system is constructed to generate quickly compensating signals to ensure tracking performance of command signal.By the Lyapunov stability proof,the proposed control scheme can enssure that the tracking errors converge to an arbitrarily small neighborhood around zero when the actuator constraints and aerodynamic uncertainties exist.Finally,numerical simulations are implemented to illustrate the effectiveness of the proposed control method.
Transactions of Nanjing University of Aeronautics & Astronautics
the National Natural Science Foundation of China(No.61304099)
the Foundation of Graduate Innovation Center in NUAA(No.kfjj20171505)
the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX18_0304).
XIANG Kai received B.S.degree from Department of Mathematics,Harbin University of Science and Technology,and is currently a postgraduate at College of Astronautics,Nanjing University of Aeronautics and Astronautics(NUAA).His research interest is guidance and control of hypersonic vehicles;Corresponding author,DU Yanli received her Ph.D.degree from NUAA in 2011.Now she is an associate professor at College of Astronautics,NUAA.Her research interests include the guidance and control of hypersonic vehicles or reusable launch vehicles.E-mail address:firstname.lastname@example.org;ZHANG Peng is currently a postgraduate at College of Astronautics,NUAA.His research interest is guidance and control of hypersonic vehicles;LIN Haibing is currently a postgraduate at College of Astronautics,NUAA.His research interest is guidance and control of hypersonic vehicles.