Adaptive accurate tracking control of HFVs in the presence of dead-zone and hysteresis input nonlinearities

• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（5）
• 页码范围: 642-651
• 页数: 10页
• 语种: 英文

摘要

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 backstepping 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.