Date of Award


Document Type


Degree Name

Master of Science (MS)


Computer Engineering and Sciences

First Advisor

Luis Daniel Otero

Second Advisor

Aldo Fabregas Ariza

Third Advisor

Mary Ann Gaal

Fourth Advisor

Philip J. Bernhard


Bridges are essential in the infrastructure transportation system. Repairs and maintenance are the key activities to keep them safe for use. Over the years, the evolution of technology has been applied to improve the way bridges are designed, built, monitored, inspected, and repaired. Nevertheless, there is still a gap between the research efforts and the application of this knowledge in the practical field of bridge inspections. Model-based Systems Engineering is a formalized methodology in the system design that is centered around the model throughout all the life cycle stages of a system, supporting the requirements, design, analysis, verification, and validation activities while developing complex systems. It has been applied successfully in other industries such as defense, aerospace, and automotive, among others, but there is no record to date of any application in the bridge inspection area. In this paper, a Model-Based Systems Engineering (MBSE) design framework is proposed for a Bridge Deflection Measurement System, using MagicGrid methodology and the Systems Modeling Language (SysML), performing a formalized analysis of the requirements for a system measuring the bridge deflection based on the stakeholder needs gathered from the literature. A case study is presented based on a system proposed for the bridge deflection measurement based on a non-contact visionbased solution, where one of the most critical parts of the system is modeled, the Optical Imaging subsystem.