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Missile robust gain scheduling autopilot design using full block multipliers

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3 Author(s)
Jianqiao Yu ; School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China ; Guanchen Luo ; Wentao Yin

Reduction of conservatism is one of the key and difficult problems in missile robust gain scheduling autopilot design based on multipliers. This article presents a scheme of adopting linear parameter-varying (LPV) control approach with full block multipliers to design a missile robust gain scheduling autopilot in order to eliminate conservatism. A model matching design structure with a high demand on matching precision is constructed based on the missile linear fractional transformation (LFT) model. By applying full block S-procedure and elimination lemma, a convex feasibility problem with an infinite number of constraints is formulated to satisfy robust quadratic performance specifications. Then a grid method is adopted to transform the infinite-dimensional convex feasibility problem into a solvable finite-dimensional convex feasibility problem, based on which a gain scheduling controller with linear fractional dependence on the flight Mach number and altitude is derived. Static and dynamic simulation results show the effectiveness and feasibility of the proposed scheme.

Published in:

Journal of Systems Engineering and Electronics  (Volume:21 ,  Issue: 5 )