Reliable, risk-averse design of complex engineering systems with optimized performance requires dealing with uncertainties. A conventional approach is to add safety margins to a design that was obtained from deterministic optimization. Safer engineering designs require appropriate cost and constraint function definitions that capture the risk associated with unwanted system behavior in the presence of uncertainties. The paper proposes two notions of certifiability. The first is based on accounting for the magnitude of failure to ensure data-informed conservativeness. The second is the ability to provide optimization convergence guarantees by preserving convexity. Satisfying these notions leads to certifiable risk-based design optimization (CRIBDO). In the context of CRIBDO, risk measures based on superquantile (aka conditional value-at-risk) and buffered probability of failure are analyzed. CRIBDO is contrasted with reliability-based design optimization (RBDO), in which uncertainties are accounted for via the probability of failure through a structural and a thermal design problem. A reformulation of the short column structural design problem leading to a convex CRIBDO problem is presented. The CRIBDO formulations capture more information about the problem to assign the appropriate conservativeness, exhibit superior optimization convergence by preserving properties of underlying functions, and alleviate the adverse effects of choosing hard failure thresholds required in RBDO.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Certifiable Risk-Based Engineering Design Optimization


    Beteiligte:

    Erschienen in:

    AIAA Journal ; 60 , 2 ; 551-565


    Erscheinungsdatum :

    2021-12-14


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Certifiable Computational Fluid Dynamics Through Mesh Optimization

    W. G. Habashi / J. Dompierre / Y. Bourgault et al. | AIAA | 1998


    Certifiable L1 adaptive control for helicopters

    Bichlmeier, Magnus | GWLB - Gottfried Wilhelm Leibniz Bibliothek | 2016


    Certifiable software-integration for engine electronics

    Jersak, Marek / Richter, Kai / Ernst, Rolf et al. | Tema Archiv | 2003


    Certifiable L1 adaptive control for helicopters

    Bichlmeier, Magnus | TIBKAT | 2016