On Computer Directed Calibration of Gas Turbine Engine Controls

The application of time-sharing computation to the calibration of aircraft gas turbine engine controls is described. The control is, typically, a hydromechanical unit composed of sensors, speed governors, servo systems, sleeve and pilot valves, feedback or follow-up devices, cams, and metering systems. Its complexity and required set-in accuracy present a challenge to even the most experienced calibration personnel. A high-speed time-sharing computer is brought to the service of these personnel to direct the adjustment process and to provide diagnostic and prognostic information.