Practical sensor fault torelant control system

The fundamental purpose of an FTCS scheme is to ensure that faults do not result in system failure and ensure the achievement of best performance at a lower degree of system performance. In this paper we propose a fault tolerant control design consisting of two parts: a nominal performance controller and a fault detection element to provide fault compensating signals to the feedback loop. The nominal controller can have any given structure that satisfies the performance specification. When a sensor failure is detected, the controller structure is augmented by signals from plant model to compensate for the fault. A temperature control system is used as a case study. Results of simulation and real time implementation for temperature control system concur and demonstrate the applicability of the proposed FTCS scheme.