Reconfigurability evaluation for disturbance rejection control systems under actuator outages

Abstract This work aims to develop a quantitative reconfigurability evaluation method for control systems with disturbances in the case of actuator outages. The basic idea of this method is to investigate and quantify the performance of the nominal system under the condition that the specified faults are recoverable. We propose a reconfigurability index based on H 2 performance that simultaneously considers both the normal scenario and various fault scenarios. A modified Newton-Kleinman algorithm is used to calculate the evaluation index. Guided by the result of the reconfigurability evaluation, the system structure is optimized to achieve a tradeoff between the control performance under normal conditions and the reconfiguration performance under the fault conditions. Finally, the effectiveness of the proposed method is illustrated through two application examples, namely, aircraft and satellite attitude control systems.

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