NEAREST NEIGHBOUR GRADIENT ALGORITHM IN SUBSPACE PREDICTIVE CONTROL UNDER FAULT CONDITION

Dong Xi-guang, Guo Xiao-yong, and Wang Jian-hong

Keywords

Fault, subspace predictive control, nearest neighbour gradient, dual decomposition

Abstract

Here subspace predictive control strategy is applied to design controller under the fault condition. The statistic description and explicit expression of the residual are analysed after the output predictive estimations are derived. The problem of designing predictive controller is formulated as an optimization problem with equality and inequality conditions, the dual decomposition is used to change the original constraint optimization problem into an unconstraint optimization problem. Further, the nearest neighbour gradient algorithm is proposed to solve the primal dual optimization problem. Finally, the efficiency of the control strategy can be realized by a helicopter.

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