Design of Fault Tolerant Control System(strategy) for Two Water Tanks

Abstract

In industrial processes, reliability, availability, and safety, are always in a high demand. Fault tolerant control (FTC) is fundamental these days in the automation industry. Control systems are susceptible against breakdown because of feasible shortcomings in actuators, sensors or different parts of the system. Equipment disappointment of the dynamic system part has additionally a noteworthy economy affect for causing unpredictable plant shutdown. The primary goal of this paper is to develop a control approach/strategy to estimate errors/faults guarantee a satisfactory performance for the system under both normal and fault environments, in addition to implement the correct fault tolerant identification method that will result in a reliable process of system operation. This can occur in nonlinear water tank systems, linearized around an operation point and performed by a mathematical model. The limit check based-model fault detection was used to detect the fault. The system component work under installed controller with FTC connected to it. Then, fault is emulated and entered independently for every part. After that a controller (with FTC joined to it) is to be reconfigured, when equipment fault occurred. The obtained result shows that, when the faults are injected separately in system components, the tank2 levels is affected and reach below the set point (50%). Within the sight of FTC, when the faults are injected, the proportional, integral, and derivative (PID) controller reconfigure the pump flow rate and valve position to maintain tank2 level.