Adaptive backstepping control for air-breathing hypersonic vehicles with input nonlinearities

作者：Hu, Qinglei^*; Meng, Yao; Wang, Chenliang; Zhang, Youmin

来源：Aerospace Science and Technology, 2018, 73: 289-299.

DOI：10.1016/j.ast.2017.12.001

• Hypersonic vehicle
• Flexible modes
• Input nonlinearities
• Dead-zone
• Input saturation

This paper addresses the control problem of air-breathing hypersonic vehicles subject to input nonlinearities, aerodynamic uncertainties and flexible modes. An adaptive backstepping controller and a dynamic inverse controller are developed for the altitude subsystem and the velocity subsystem, respectively, where the former eliminates the problem of "explosion of terms" inherent in backstepping control. Moreover, a modified smooth inverse of the dead-zone is proposed to compensate for the dead-zone effects and reduce the computational burden. Based on this smooth inverse, an input nonlinear pre compensator is designed to handle input saturation and dead-zone nonlinearities, which leads to a simpler control design for the altitude subsystem subject to these two input nonlinearities. It is proved that the proposed controllers can guarantee that all closed-loop signals are bounded and the tracking errors converge to an arbitrarily small residual set. Simulation results are carried out to demonstrate the effectiveness of the proposed control scheme.

• 出版日期2018-2
• 单位北京航空航天大学