An integral criterion for appraising the overall quality of a computer-based hydroturbine governing system

In this paper, an integral criterion is developed for overall analysis and appraisal of the performance, reliability and economy of a computer-based control system. A concept of performability is discussed, and the economic optimality is based on the overall benefits from the manufacturer to the user. A case study for a hydroturbine governing system is given. A comparison between different system configurations shows that it is helpful and beneficial to select a system possessing high indices and excellent quality. Keywords: Performance; Function; Reliability; Performability; Economic optimality; Computer-based control system