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Meeting	ACGS Committee Meeting 107 - Boulder - March 2011
Agenda Location	8 SUBCOMMITTEE E – FLIGHT, PROPULSION, AND AUTONOMOUS VEHICLE CONTROL SYSTEMS 8.1 History of Aircraft Engine Control
Title	History of Aircraft Engine Control
Presenter	Sanjay Garg
Affiliation	NASA Glenn
Available Downloads*	presentation
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Abstract	Link C. Jaw Scientific Monitoring, Inc., Scottsdale, Arizona Sanjay Garg NASA Glenn Research Center, Cleveland, Ohio ABSTRACT This paper presents a historical perspective of the advancement of control technologies for aircraft gas turbine engines. The paper primarily covers technology advances in the United States in the last 60 years (1940 ~ 2002) with an emphasis on the pioneering technologies that have been tested or implemented during this period. Since the first United States-built aircraft gas turbine engine was flown in 1942, engine control technology has evolved from a simple hydro-mechanical fuel metering valve to a full-authority digital electronic control system that is common to all modern aircraft propulsion systems. Using system complexity and capability as a measure, we can break the historical development of control systems down to four phases: 1) the start-up phase (1942 – 1949), 2) the growth phase (1950 – 1969), 3) the electronic phase (1970 – 1989), and 4) the integration phase (1990 – 2002). In each phase, the state-of-the-art control technology is described; the engines that have made historical landmarks, from the control and diagnostic standpoint, are identified. Then the historical perspective of the engine controls in the last 60 years is presented, in terms of control system complexity, number of sensors, number of lines of software (or embedded code), etc. The presentation has been updated to provide some perspective on propulsion control technology development since 2002.