DocumentCode :
325347
Title :
Nonlinear control of a reusable rocket engine for life extension
Author :
Lorenzo, Carl F. ; Holmes, Michael S. ; Ray, Asok
Author_Institution :
NASA Lewis Res. Center, Cleveland, OH, USA
Volume :
5
fYear :
1998
fDate :
21-26 Jun 1998
Firstpage :
2922
Abstract :
This paper presents the conceptual development of a life-extending control system where the objective is to achieve high performance and structural durability of the plant. A life-extending controller is designed for a reusable rocket engine via damage mitigation in both the fuel (H2) and oxidizer (O2) turbines while achieving high performance for transient responses of the combustion chamber pressure and the O2/H2 mixture ratio. The design procedure makes use of a combination of linear and nonlinear controller synthesis techniques and also allows adaptation of the life-extending controller module to augment a conventional performance controller of the rocket engine. The nonlinear aspect of the design is achieved using nonlinear parameter optimization of a prescribed control structure. Fatigue damage in fuel and oxidizer turbine blades is primarily caused by stress cycling during start-up, shutdown, and transient operations of a rocket engine. Fatigue damage in the turbine blades is one of the most serious causes for engine failure
Keywords :
aerospace control; chemical variables control; control system synthesis; nonlinear control systems; pressure control; rocket engines; transient response; turbines; combustion chamber pressure; controller design; engine failure; fatigue damage; high performance; life-extending control system; linear controller synthesis; nonlinear control; nonlinear controller synthesis; nonlinear parameter optimization; reusable rocket engine; shutdown; start-up; stress cycling; structural durability; transient operation; transient responses; turbine blades; Blades; Combustion; Control systems; Design optimization; Engines; Fatigue; Fuels; Pressure control; Rockets; Turbines;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference, 1998. Proceedings of the 1998
Conference_Location :
Philadelphia, PA
ISSN :
0743-1619
Print_ISBN :
0-7803-4530-4
Type :
conf
DOI :
10.1109/ACC.1998.688392
Filename :
688392
Link To Document :
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