الفهرس 
1. INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Since there is no framework in this present reality that can work impeccable at all time, fault tolerant control systems (FTCSs) have turned into a basic issue particularly for cutting edge complex technological frameworks. The fault tolerant control system (FTCS) is characterized as a control system that possesses the ability to accommodate system component faults automatically. As of late, fault tolerant control (FTC) techniques are ordered into passive and active methodologies. In passive FTC, controllers are intended to be powerful against a class of assumed faults. In active FTC, controllers utilize both system rebuilding and control reconfiguration to move forward system execution within the sight of faults. Vitally to forestall critical performance degradation or damages to the system, it is important to detect and identify the conceivable faults in the framework as right on time as could reasonably be expected. As needs be, fault detection and diagnosis (FDD) plan with high affectability to faults and capacity to give exact and the most avant-garde data about the framework when conceivable after the fault event is required. This thesis embraces a coordinated active fault tolerant control framework (AFTCS) plan depends on a fault detection and diagnosis (FDD) process to monitor system performance, detect irregular conditions through residuals era calculation, isolate the broken component(s) in the framework and estimates the effectiveness factor relating to the detected fault. A model-based fault detection and diagnosis (FDD) procedure utilizing a bank of observers have been composed with a specific end goal to detect, isolate, and estimate faults, and mainly to recognize sensor and actuator faults depending on nitty gritty exact learning of framework dynamical model. An explicit fault estimation calculation is inferred to estimate the effectiveness factor of a detected
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faulty sensor or actuator. In like manner, a precise way to deal with an on-line controller reconfiguration outline for the post-fault framework is initiated to recoup both transient and steady state performance in spite of fault occurrences. A reconfigurable controller with reference input outline system is proposed utilizing fault hiding approach to ensure the stability of the reconfigured system .The fault hiding reconfigurable control methodology depends on setting a reconfiguration block in the middle of the nominal controller and the faulty plant at reconfiguration time. The reconfiguration hides the fault from the nominal controller and helps the faulty plant to work in a perfect case. The reconfiguration block contains a virtual sensor (an observer-like system) and a virtual actuator (a dual observer-like system) in the general case. The adequacy of the proposed fault detection and diagnosis (FDD) plan has supported by simulation result on the benchmark Four-Tank System with simulated actuator and sensor faults. The viability of the showed methodology of created active fault tolerant control system (AFTCS) with blend of both control reconfiguration calculation and fault detection and diagnosis (FDD) plan has defended by simulation result on the Greenhouse Climate Control System with simulated actuator /sensor faults and Thrust Compound Control System of a train . The exhibitions of the control reconfiguration methodology are stressed by simulation results of the fault-free case, the faulty case without reconfiguration and fault accommodation with controller reconfiguration.