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TACTICAL (sentence-level): - Applied Gopen's Sense of Structure principles - Broke long sentences into shorter, punchier statements - Strengthened verb choices and reduced passive voice - Improved topic-stress positioning - Created better rhythm and clarity OPERATIONAL (paragraph/section): - Added backward references between subsections - Strengthened transitions between major sections - Improved coherence within sections - Made topic strings more consistent STRATEGIC (document-level): - Enhanced Heilmeier question alignment - Strengthened section-to-section connections - Made 'what is new' clearer throughout - Ensured each section explicitly addresses its assigned questions - Improved overall narrative flow Focus: Clarity and impact over nitpicking. Changes maintain technical precision while improving readability.
54 lines
4.0 KiB
TeX
54 lines
4.0 KiB
TeX
% GOAL PARAGRAPH
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I develop autonomous control systems with mathematical guarantees of safe and correct behavior.
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% INTRODUCTORY PARAGRAPH Hook
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Nuclear reactors today depend on extensively trained human operators who follow detailed written procedures and switch between control objectives as plant conditions change.
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% Gap
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Small modular reactors face a fundamental economic challenge: their per-megawatt staffing costs significantly exceed those of conventional plants. This threatens economic viability. Autonomous control systems could manage complex operational sequences without constant supervision—but only if they provide safety assurance equal to or exceeding human-operated systems.
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% APPROACH PARAGRAPH Solution
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I produce hybrid control systems correct by construction. This unifies formal methods from computer science with control theory.
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% Rationale
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Human operators already work this way: discrete logic switches between continuous control modes. Formal methods generate provably correct switching logic but cannot handle the continuous dynamics governing transitions. Control theory verifies continuous behavior but cannot prove discrete switching correctness. End-to-end correctness requires both approaches working together.
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% Hypothesis and Technical Approach
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Three stages bridge this gap. First, NASA's Formal Requirements Elicitation Tool (FRET) translates written operating procedures into temporal logic specifications. FRET structures requirements by scope, condition, component, timing, and response. Realizability checking then exposes conflicts and ambiguities before implementation begins. Second, reactive synthesis generates deterministic automata provably correct by construction. Third, reachability analysis verifies that continuous controllers satisfy the requirements imposed by each discrete mode. Engineers design these continuous controllers using standard control theory techniques.
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Control objectives classify continuous modes into three types. Transitory modes drive the plant between conditions. Stabilizing modes maintain operation within regions. Expulsory modes ensure safety under failures. Barrier certificates and assume-guarantee contracts prove safe mode transitions, enabling local verification without global trajectory analysis. The methodology demonstrates on an Emerson Ovation control system—the industrial platform nuclear power plants already use.
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% Pay-off
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This approach manages complex nuclear power operations autonomously while maintaining safety guarantees, directly addressing the economic constraints threatening small modular reactor viability.
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% OUTCOMES PARAGRAPHS
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This research, if successful, produces three concrete outcomes:
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\begin{enumerate}
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% OUTCOME 1 Title
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\item \textit{Synthesize written procedures into verified control logic.}
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% Strategy
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A methodology converts written operating procedures into formal specifications.
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Reactive synthesis tools then generate discrete control logic from these specifications.
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% Outcome
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Control engineers generate mode-switching controllers directly from regulatory
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procedures. Minimal formal methods expertise required. This reduces barriers to
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high-assurance control systems.
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% OUTCOME 2 Title
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\item \textit{Verify continuous control behavior across mode transitions.}
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% Strategy
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Reachability analysis verifies that continuous control modes satisfy discrete
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transition requirements.
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% Outcome
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Engineers design continuous controllers using standard practices while
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maintaining formal correctness guarantees. Mode transitions occur safely and at
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the correct times—provably.
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% OUTCOME 3 Title
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\item \textit{Demonstrate autonomous reactor startup control with safety
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guarantees.}
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% Strategy
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This methodology demonstrates on a small modular reactor simulation using industry-standard control hardware.
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% Outcome
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Control engineers implement high-assurance autonomous controls on
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industrial platforms they already use, enabling autonomy without retraining
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costs or new equipment development.
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\end{enumerate}
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