Strategic Engineering requires system models that relate architectural and design decisions to the actual or expected behavior of systems and products during manufacturing or operations.

These models are either physics-based or empirical (i.e. derived from existing data) and capture the essential relationships between form and functional elements. Typically models will be parameterized such that a variety of instantiations of systems can be simulated under different operating conditions. Models can be characterized in terms of their fidelity, accuracy, complexity and comprehensiveness (multi-physics). Research into modeling of design, implementation, operations and investment costs also belongs into this category. Research in the field of Integrated modeling and simulation aims at facilitating the construction of multidisciplinary models, while improving their fidelity and increasing the efficiency of simulations.

Our specific contributions in the area of integrated modeling and simulation include:

• A fast time-domain solver for linear time-invariant (LTI) systems (fastlsim)
• Integrated modeling and simulation of communications satellites, including satellite constellations
• A spatial Nyquist-criterion based method for "sizing" the finite element meshes of dynamical structures with application to telescope structures

Links

SPIE Defense & Security Symposium 2007
Orlando, Florida, USA, April 9-13, 2007
MODELING, SIMULATION, AND VERIFICATION OF SPACE-BASED SYSTEMS IV (DS14)
http://spie.org/Conferences/Calls/07/dss/conferences/index.cfm?fuseaction=DS14

Publications

• Howell D.J., de Weck O. L., and Miller D.W., “A quantitative fidelity metric for dynamic beam models based on the spatial Nyquist criterion”, Communications in Numerical Methods in Engineering, October 2007, (accepted)
• Sou K.C. and de Weck O., “Fast time-domain simulation for large-order linear time-invariant state space systems”, International Journal of Numerical Methods in Engineering, 63 (5), p 681-708, June 2005 PDF
• de Weck O.L., Uebelhart S.A., Gutierrez H.L.  and Miller D.W., “Disturbance and Sensitivity Analysis for Large Order Linear Time-Invariant Systems”, AIAA-2002-5437, 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis & Optimization, Atlanta, Georgia, 4-6 September, 2002. PDF
• Chung S.J., Miller D.W., de Weck O.L., “ARGOS testbed: study of multidisciplinary challenges of future spaceborne interferometric arrays”, Optical Engineering, 43 (9), 2156-2167, September 2004
• Chang, D.D. and de Weck, O., “Basic capacity calculation methods and benchmarking for MF-TDMA and MF-CDMA communication satellites”, International Journal of Satellite Communications and Networking, 23 (3), 153-171, May/June 2005 PDF
• Springmann P.N., and de Weck, O.L. ”Parametric Scaling Model for Nongeosynchronous Communications Satellites”, Journal of Spacecraft and Rockets, 41 (3), 472-477, May-June 2004 PDF
• de Weck O. L., Miller D. W., Mosier G. E., “Multidisciplinary Analysis of the NEXUS Precursor Space Telescope”, 2002 SPIE Astronomical Telescopes and Instrumentation, Conference on Highly Innovative Space Telescopes, Paper SPIE 4849-39, Waikoloa, Hawaii USA, 22-28 August 2002. PDF
• de Weck O., Miller D., Mosier G., “Integrated Modeling and Dynamics Simulation for the Next Generation Space Telescope”, SPIE-4013-105, SPIE International Symposium on Astronomical Telescopes and Instrumentation 2000, Munich, Germany, 27-31 March, 2000. PDF