Control Allocation–Based Command Tracking–Control System for Hypersonic Re-entry Vehicle Driven by Hybrid Effecters
Publication: Journal of Aerospace Engineering
Volume 31, Issue 4
Abstract
The paper deals with a command tracking–control system (CTCS) design problem for plants involving both continuous and discrete effecters, namely hybrid effecters. Firstly, a reaction control system (RCS) model of a hypersonic re-entry vehicle (HRV) is established, and then linearization around the trim points is carried out for both longitudinal-direction and lateral-directional nonlinear models of HRV, respectively. Second, a general command-tracking problem is converted to a regulation problem by constructing a deviation system, and an optimal state feedback controller is designed to generate a continuous torque command. Then, a daisy-chained control-allocation method is applied to assign the torque command between the aerosurfaces and RCS, and an innovative control-allocation strategy of integrating model predictive control with mixed-integer linear programming (MPC/MILP) is proposed to distribute the torque to RCS among thrusters, where the switching-time constraints of the thrusters can be taken into account explicitly. Finally, the proposed control-allocation strategy is demonstrated to the longitudinal angle-of-attack (AOA) CTCS and the lateral-directional bank angle CTCS design for HRV. Compared with MILP, the MPC/MILP control-allocation strategy is more reasonable in on/off switching of the RCS thrusters and effective in reducing the wastage of the RCS fuel. Simulation results using a six-degree-of-freedom (6-DOF) nonlinear dynamics model of HRV show that the proposed strategy is suitable for the CTCS design of HRV driven by both the aerosurfaces and the RCS.
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Acknowledgments
This research was supported by the Aviation Science Foundation of China (20110172001), and it is also supported by the Cultivation Special Purpose Project of the Science and Technology Innovation, Major Program of Beijing Institute of Technology of China (2011CX01007).
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Published In
Journal of Aerospace Engineering
Volume 31 • Issue 4 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jan 8, 2015
Accepted: Nov 28, 2017
Published online: Apr 9, 2018
Published in print: Jul 1, 2018
Discussion open until: Sep 9, 2018
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