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Sky’s the Limit “UCSD to Build $10 Million Largest Shake-Table in the United States” Ahmed Elgamal Department of Structural Engineering Sensors it’s …. a small world after all ….. Kris Pister (UC Berkeley) http://dust-inc.com/ $50 motes today $1 motes in 12 months Lifetime in months/years Comm. range of 10m or more Quality? Very Few Sensors Expensive…. Must Guess: Structural Condition Stresses and Strains Long Term Performance Fatigue Seismic Response Wind … ….. Can’t really “SEE” what’s going on • • • • • Cameras • • Vibration • Traffic Load • Wind Speed Displacement • • Strain • Temperature • • Humidity • …… • • • • • • •• • • • • • • • • • • • • • • • 1000’s of sensors (Sensor Network) • • • • • • • • • • • • • •• • • • • •• • • • • • • • • • • • • • • • • • Vision • • • •• • •• • •• • • •• • • • Construction Joints Friction Damping Linear response Nonlinear response Wind Traffic seismic Close-up! Uncertainties Statistical Inference & Modeling The Millennium Bridge, London 2000 Works of ART Beautiful Bridges Blend with Environment Smooth, Simple, Landmark New Structural Design Concepts Mechanical Devices (e.g., Dampers) http://www.arup.com/MillenniumBridge/ Millennium Bridge, London, UK 2000 Toro Peak UCSD Advanced Composites Bridge Imperial County (near Palm Springs) 100 accelerometers, strain gages, and video link Bridge Toro Peak Mt Soledad Anywhere worldwide Continuous Wireless Monitoring http://hpwren.ucsd.edu/ In-Flight Health Monitoring for Unmanned Air Vehicles Fiber-optic and piezo-electric sensors • Embedded in composite wings, tails • Locate flight-induced battle damage • Algorithm to assess vehicle integrity • Automated maintenance scheduling Predator Pumice Microstructure GENERAL ATOMICS Autonomous Unmanned Air Vehicle (Global Albedo Project) Explain how aerosols and clouds regulate the planetary albedo. Condensation Particle Counter Concentrations of aerosals in clouds San Diego to Hawaii San Diego Optical Particle Counter Concentrations of particles in clouds Hawaii Pyronameter Total solar radiation Instrument: 5 kg Mission 5000 km Cruise: 35 m/sec Pre-programmed mission can be monitored/ changed on Iradium satellite network Bridge 1 Bridge 2 Sensor net (real-time data, video streams) Integrated Analysis Framework Numerical Simulation Processing Raw Data Archive Knowledge-based Image Analysis Integration High Visualization Statistical Modeling Analysis Performance Database & Risk Analysis Decision Analysis Analysis Engine Derived Data Archive Application Interfaces Portal Monitoring Analysis Decision Support Sensor Network 1000s of heterogeneous sensors Real time data streams/decision Internet Single hop,.. multi-hop,… blue tooth, …802.11b, … Features Accessibility and deployment (get rid of wires) Low power/scavenging 2 way communication Scalable, Robust, Self Healing, … Research Deploy brainpower right on the structure sensor level (smart sensor) sensor cluster (Hub) Analysis/decision-support Servers Archiving/Analysis/Decision Database 1000 sensor framework Metadata models Advanced Query processing Data Fusion (heterogeneous information integration) Information acquisition/management/access APIs Internet DATA Sensor net (real-time data, video streams) Data Analysis Hierarchical Model-Based Approaches Analytical Models Finite Element Models INFORMATION Data Analysis Model-Free Approaches Data Mining Statistical pattern recognition Neural Networks DATABASE Statistical Inference and Probabilistic modeling Physics-based model validation Finite element model updating System identification KNOWLEDGE Uncertainty Material properties Geometric properties Loading state Structural Condition Boundary conditions Modeling approximations Measurement errors Bayesian Statistical Inference Prior Data-based Updated DECISION Under Constraints Technology Economy Society Politics “Beauty” Decision-Making Tool Infra-structure management Retrofit/strengthening Emergency response Preventive maintenance Replacement Model-Based Structural health assessment Reliability and Risk evaluation Proposed Gibraltar 9 mile, $ 15 Billion Mega Bridge Life-cycle management Environmental Impacts Sustainability Leonardo da Vinci’s Bridge, Ås, Norway http://www.vebjorn-sand.com/leonardo.html 500 Years After It Was Designed, Leonardo da Vinci's Bridge Goes UP! It’s a small world after all….. UC Berkeley Gregory Fenves Frank McKenna Kris Pister Structural Engineering Scott Ashford Joel P. Conte Francesco L. di Scalea Ahmed Elgamal Mike Fraser Stanford Hong Guan Kincho Law Andre Filiatrault James Peng Vistasp Karbhari John B. Kosmatka Scripps, IGPP Petr Krysl Hans-Werner Braun J. Enrique Luco V. Ramanathan Jose Restrepo Frank Vernon Frieder Seible Lelli Van Den Einde UC Irvine Magda El Zarki USC Sami Masri Texas A&M Norris Stubbs UCSD, CSE Mohan Trivedi Ingolf Kruger Ramesh Rao Larry Smarr Caltrans John Allison Cliff Roblee Charles Sikorsky SDSC Tony Fountain Chaitan Baru Amarnath Gupta Mike Bailey LANL Chuck Farrar
