H∞-Based LQR Control for Flexible Air-Breathing Hypersonic Vehicles with Pole Placement

Abstract:

Focusing on a nonlinear longitudinal dynamical model for air-breathing hypersonic flight vehicles (AHFV), we propose a state feedback linearized model on a nominal trim condition. To stabilize the flight of an AHFV in the presence of external disturbances, a new H based Linear Quadratic Regulator (LQR) control law with pole placement is designed. Indexes for H performance, quadratic performance and pole placement are considered together. As a result, the robustness of system is improved and the AHFV system is effectively stabilized. Numerical simulation shows that the controller can effectively stabilize the AHFV system with some disturbances and assign the poles into a desired region.

• Periodical: Advanced Materials Research (Volume 787)
• Pages: 938-943
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.787.938
• Online since: September 2013
• Authors: Xue Zhang, Xiao Geng Liang
• Keywords: H∞ Performance, Linear Matrix Inequality (LMI), Linear Quadratic Regulator (LQR) Control, Pole Placement

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