Burns, Meghan Colleen2018-05-242018-05-242018-05-23vt_gsexam:15170http://hdl.handle.net/10919/83381This thesis compares three variations of the Bayesian network as an aid for decision-making using uncertain information. After reviewing the basic theory underlying probabilistic graphical models and Bayesian estimation, the thesis presents a user-defined static Bayesian network, a static Bayesian network in which the parameter values are learned from data, and a dynamic Bayesian network with learning. As a basis for the comparison, these models are used to provide a prior assessment of the safety of flight of a small unmanned aircraft, taking into consideration the state of the aircraft and weather. The results of the analysis indicate that the dynamic Bayesian network is more effective than the static networks at predicting safety of flight.ETDIn CopyrightDynamic Bayesian NetworkUnmanned Aerial SystemsRiskThesis