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Adaptive accurate tracking control of HFVs in the presence of dead-zone and hysteresis input nonlinearities
Affiliation:Graduate College, Air Force Engineering University, Xi'an 710100, China;Aeronautics Engineering College, Air Force Engineering University, Xi'an 710038, China;Aeronautics Engineering College, Air Force Engineering University, Xi'an 710038, China;Graduate College, Air Force Engineering University, Xi'an 710100, China;Delft Center for Systems and Control, Delft University of Technology, Mekelweg 2, Delft 2628 CD, The Netherlands
Abstract:A novel accurate tracking controller is developed for the longitudinal dynamics of Hypersonic Flight Vehicles (HFVs) in the presence of large model uncertainties, external disturbances and actuator nonlinearities. Distinct from the state-of-the-art, besides being continuity, no restrictive conditions have been imposed on the HFVs dynamics. The system uncertainties are skillfully handled by being seen as bounded “disturbance terms”. In addition, by means of back-stepping adaptive technique, the accurate tracking (i.e. tracking errors converge to zero as time approaches infinity) rather than bounded tracking (i.e. tracking errors converge to residual sets) has been achieved. What’s more, the accurate tracking problems for HFVs subject to actuator dead-zone and hysteresis are discussed, respectively. Then, all signals of closed-loop system are verified to be Semi-Global Uniformly Ultimate Boundness (SGUUB). Finally, the efficacy and superiority of the developed control strategy are confirmed by simulation results.
Keywords:Accurate tracking control  Back-stepping control  Dead-Zone and hysteresis  Hypersonic flight vehicles  Non-affine model
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