›› 2013, Vol. 39 ›› Issue (3): 1-7.doi: 10.3969/j.issn.1674-1579.2013.03.001

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StateFeedbackBased Parameterization of GoldenSection Adaptive Control and Its Applications in Hypersonic Vehicles

  

  • Online:2013-06-24 Published:2013-08-27

Abstract: This paper is concerned with the mixed H2 and H∞ adaptive control for hypersonic vehicles during reentry phase. The dynamics of the angle of attack in the longitudinal plane is modeled by using a secondorder difference equation known as the characteristic model. In order to improve the transient performance in the presence of large aerodynamic coefficient variations and unknown exogenous disturbances, a more intelligent goldensection robust adaptive control law with the similar structure as the characteristic model with goldensection parameters, is proposed based on our previous work. In addition to easy implementation and guarantee of stability before the convergence of parameter estimation, this new adaptive control law contains an adjustable parameter λ(k) that guarantees H2 and H∞ robustness of the system, and is calculated based on the linear matrix inequality approach. The integration of adaptive control and robust control provides the attitude control system for hypersonic vehicles with the capability to accommodate large flight conditions in a reliable way. Simulations are carried out on a hypersonic vehicle

Key words: hypersonic cruise vehicles, control, robust adaptive control

CLC Number: 

  • V44