Development of fault-tolerant flight control systems in realistic environment

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What is the most important concern when one sits on the airplane or drives a car? It would not be surprising for the answer to be the "safety" of the airplane or car. This is an issue relevant to the reliability, safety and fault-tolerant control of such types of safety-critical systems. Improving the reliability and safety of safety-critical systems, such as airplanes, space vehicles, automobiles, nuclear power plants, chemical or petrochemical plants, is extremely important since the consequences of failures in such systems can be catastrophic. It is necessary to design control systems that are capable of tolerating potential failures in these systems to improve the reliability and availability whilst providing desirable performance. This type of control systems is often known as Fault-Tolerant Control Systems (FTCS). In particular, FTCS applied to flight control are referred to as Fault-Tolerant Flight Control Systems (FTFCS).