Improving system availability using overlapping decomposition-based robust control

High availability is always expected for the continuation of operations in a plant. However, this objective is unable to attain due to the unplanned breakdowns, which could lead to unusual variations and faults. This paper works on improving the availability of system by accurately handling the fault information. This was made possible by proposing a subsystem-based robust control. The overlapping decomposition was employed to tackle the variations independently for each state. The stability of the system was proved further using a Lyapunov stability criteria. Performance evaluation was then conducted on an interconnected continuous time stirred tank reactor (CSTR) with recycle. The proposed scheme effectively controlled the faults to avoid costly failures.