A nonlinear flight controller design using H∞ optimization and hierarchy-structured dynamic inversion(HSDI)is proposed for a winged missile with disturbance considered. The structure of HSDI is reduced to three layers according to their time-scales and variables are recategorized to simplify the HSDI controller design. Then, the HSDI controller and the nonlinear 6 degrees-of-freedom(DOF)dynamic model of the researched missile are used to compose the generalized plant. More-over, the state variables of plant are rearranged. And a 2 DOF H∞ control structure is also introduced to enhance robustness performance. The analysis of close-loop system singular values and nonlinear 6 DOF flight simulation results presented in the paper demonstrate the good tracking performance and disturbance rejection of the designed flight controller.
CAO Lijia, ZHANG Shengxiu, LI Xiaofeng, LIU Yi'nan
. Nonlinear Flight Controller Design Using H∞ Optimization and Hierarchy-structured Dynamic Inversion[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(9)
: 1678
-1685
.
DOI: CNKI:11-1929/V.20110330.1306.005
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