Reliability and Possibility Based Multidisciplinary Design Optimization for Aircraft Conceptual Design

In recent years, uncertainties have been considered in engineering problem. The uncertainties are inherited in each phase of simulation based design process. The Reliability Based Design Optimization (RBDO) and Possibility Based Design Optimization (PBDO) methods were proposed to handle these uncertainties on design optimization. In this paper, the RBDO and PBDO methods were considered with a Multidisciplinary Design Optimization (MDO) method to accomplish the conservative design result when low fidelity analysis tools are used. This method has been applied to an aircraft conceptual design case. This research evaluates the characteristic of the RBDO and PBDO methods. It is shown that the RBDO results depend on the accuracy of uncertain parameters while the PBDO results shows more conservative results.