The paper briefly outlines some of the activities undertaken on gas turbine logic and control systems. The frequent requirement for gas turbines to operate in polluted hostile environments has encouraged the development of ancillary equipment which will reliably withstand onerous site conditions. The design requirements, philosophy, component selection and progress made on fuel control and solid state logic systems, specifically introduced to meet arduous service requirements are reviewed. A computer control system designed for more temperate environments is also examined, enabling a comparison of the theoretical reliabilities of the respective systems to be assessed when installed on gas compressor applications.

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