NEAREST NEIGHBOR GRADIENT ALGORITHM IN SUBSPACE PREDICTIVE CONTROL UNDER FAULT CONDITION

Xi-Guang Dong , Xiao-yong Guo, Jian-Hong Wang

Keywords

Fault; Subspace predictive control; Nearest neighbor gradient; Dual decomposition

Abstract

Here subspace predictive control strategy is applied to design controller under fault condition. The statistic description and explicit expression of the residual are analyzed after the output predictive estimations are derived. The problem of designing predictive controller is formulated as one optimization problem with equality and inequality conditions, the dual decomposition is used to change the original constrain optimization problem into an unconstrain optimization problem. Further the nearest neighbor 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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