Consistent design of dependable control systems

Abstract Design of fault handling in control systems is discussed, and a method for consistent design is presented. The method is based on an analysis of component failure modes and their effects. Automated analysis provides decision tables for fault handling. Mathematical models for fault detection and isolation are obtained from bond-graph models of components and subsystems. Automated analysis helps present the propagation of component faults, and shows where fault handling can be applied to stop the migration of a fault. The result is the means of obtaining significantly improved dependability of control systems with a limited implementation effort.

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