Design of on – Line Fault Tolerant Controller

A new control strategy is implemented on a heat exchanger model using fault tolerant control (FTC) based on fault detection and isolation (FDI) techniques. The approach is used in implementing this strategy, namely on-line fault tolerant control. This approach is based on using state feedback technique in the design of the gain matrix. A heat exchanger, which represents a subsystem of many industrial systems is used to verify the ability of the proposed fault tolerant methods to compensate for all faults that may take place. The proposed FTC indicates that once FDI is applied, then effect of the fault on the system is reduced, thus preventing the need for any sudden stoppage of the system. The FDI unit is usually contained within the Fault tolerant control, hence enabling the continuous operation of the system close to nominal operating conditions.