Damage-mitigating control of a reusable rocket engine: Part II-formulation of an optimal policy

Xiaowen Dai, Asok Ray

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    This sequence of papers in two parts investigates the feasibility of damage-mitigating control of a reusable rocket engine similar to the Space Shuttle Main Engine (SSME) where the objective is to increase structural durability without any significant loss of performance. To this effect, a fatigue damage model of the turbine blades has been reported in earlier publications, and a creep damage model of the main thrust chamber coolant channel has been formulated and tested in the first part. This paper, which is the second part, synthesizes an optimal policy for open loop control of up-thrust transients of the rocket engine. Optimization is based on the integrated model of the plant., structural and damage dynamics under the constraints of fatigue and creep damage in the critical components. The results are presented to demonstrate the potential of life extension of reusable rocket engines via damage mitigating control. The concept of damage mitigation, as presented in this paper, is not restricted to control of rocket engines. It can be applied to any system where structural durability is an important issue.

    Original languageEnglish (US)
    Pages (from-to)409-415
    Number of pages7
    JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
    Volume118
    Issue number3
    DOIs
    StatePublished - Jan 1 1996

    Fingerprint

    reusable rocket engines
    Reusable rockets
    engine parts
    Rocket engines
    damage
    formulations
    Creep
    Durability
    rocket engines
    durability
    Space shuttles
    Fatigue damage
    Space Shuttle Main Engine
    Coolants
    Turbomachine blades
    thrust chambers
    Turbines
    Fatigue of materials
    Engines
    turbine blades

    All Science Journal Classification (ASJC) codes

    • Control and Systems Engineering
    • Information Systems
    • Instrumentation
    • Mechanical Engineering
    • Computer Science Applications

    Cite this

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    abstract = "This sequence of papers in two parts investigates the feasibility of damage-mitigating control of a reusable rocket engine similar to the Space Shuttle Main Engine (SSME) where the objective is to increase structural durability without any significant loss of performance. To this effect, a fatigue damage model of the turbine blades has been reported in earlier publications, and a creep damage model of the main thrust chamber coolant channel has been formulated and tested in the first part. This paper, which is the second part, synthesizes an optimal policy for open loop control of up-thrust transients of the rocket engine. Optimization is based on the integrated model of the plant., structural and damage dynamics under the constraints of fatigue and creep damage in the critical components. The results are presented to demonstrate the potential of life extension of reusable rocket engines via damage mitigating control. The concept of damage mitigation, as presented in this paper, is not restricted to control of rocket engines. It can be applied to any system where structural durability is an important issue.",
    author = "Xiaowen Dai and Asok Ray",
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