Multi-objective Optimization and Mixed-Horizon Decision-Making
Abstract
4.0 STATEMENT OF WORKQ1: UNDERLYING PHYSICS DERIVED FROM NATURE1. Quantification of morphometrics and anatomy of examples from 3 taxonomic groups using computed tomagraphy, and magnetic resonance imaging techniques.2. Quantify 3D propulsor/body kinematics of fish/cetacean using high-speed videography.3. Perform material testing and measure muscle activity in fish/cetacean.4. Develop biomimetic propulsor systems to match swimming fish/cetacean.5. Measure performance metrics for swimming fish/cetacean and biomimetic fin-body configurations using experimental models.6. Initiate numerical simulations using in-house codes to establish performance of nature.7. Validation between biology, experimental models, and numerical simulations.Q2: NEW SCIENCE FOR NON-TRADITIONAL PROPULSORS1. Develop and test experimental propulsors that isolate key features observed in biology, which relate to speed and efficiency.2. Measurement of unsteady flow field for bio-inspired propulsor systems (isolated fins/flukes and fin/fluke-body).3. Perform parametric study of propulsors and propulsor-body systems to examine key metrics that influence propulsive performance using enhanced boundary element method.4. Perform high fidelity simulations of promising propulsor systems to highlight elusive details, elucidate physical mechanisms, and parse the effects of confounding variables.5. Establish relationship between actuation, structural, and wake resonance frequencies for flow fields generated by promising propulsor systems identified by numerical study.6. Compare flow fields between biology, experimental models, and numerical simulations.7. Measure surface pressure distribution on model surface in real time.8. Development of scaling laws for varying flexible 3D complex oscillating panels.9. Initiate evolutionary algorithms with boundary element method solutions to explore optimalsolutions.Q3: BIO-PROPULSORS BEYOND THE LIMITS OF BIOLOGY1. Study multiple fins interacting to enhance performance measures?in-line, side-by-side & tipto-tip?experimentally and numerically.2. Quantify performance enhancement in burst-and-coast behavior.3. Optimization to establish gaits to maximize thrust or efficiency.4. Develop necessary theory and experiments for propulsors that actively change its flexibility to maintain optimal efficiency over a large range of velocities.5. Develop and populate performance maps that compare and contrast nature and man-made propulsors and highlight areas of opportunity.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 21, 2018
- Source ID
- N000141612515
Entities
People
- Hilary Bart-Smith
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia