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Life Extending Control
Objective
Develop control methods and damage prediction technologies to
allow major reduction of damage during harsh transients while
optimizing dynamic response.
Approach/Plan
- Phase1
- Establish concept and create dynamic and damage models
suitable for real-time control
- Preliminary fatigue damage model
- Continuum fatigue damage model
- Creep model
- Phase 2
- Demonstrate open loop life extension
- Phase 3
- Demonstrate closed loop controls design methodologies
and life extension
Participants
- NASA Glenn Research Center
- Concept
- Continuum damage model
- Optimal control
- Penn State University
- Plant and structural models
- Fatigue damage model
- Creep model
- Controls
Accomplishments
- LEC concept established
- Rocket engine dynamic and structural models have been created and
implemented
- Preliminary fatigue model for control has been create and
implemented
- Continuum fatigue model created
- Creep model for engine cooling jacket created and implemented
- Open loop control demonstrated factor of three life extension
through transients
- Robust engine design concept and spin-off
- Closed loop and optimal control studies in progress
Project Contact
-
Carl F. Lorenzo
NASA Glenn Research Center
21000 Brookpark Road, M.S. 77-1
Cleveland, Ohio 44135
Phone: (216) 433-3733
email: carl.f.lorenzo@grc.nasa.gov
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