Date of Award


Degree Name

MS in Mechanical Engineering


Mechanical Engineering


College of Engineering


Xi Wu

Advisor Department

Mechanical Engineering

Advisor College

College of Engineering


Apex-Adams-Simulink co-simulation is applied to active magnetic bearing (AMB) rotors, demonstrating results unshown in literature, including continuous frequency response, and unavailable in known rotor dynamics software, including touchdown bearing impact. AMBs levitate rotors without contact, so they involve no friction, wear, lubrication, pollution, or shaft speed limits and are thus valuable for large, high-speed applications. Modeling of such rotors, necessary for safety and performance, simultaneously requires flexible body dynamics and advanced control design, but simulation programs tend to specialize in only one or the other. The co-simulation method combines multiple such programs—MSC Apex (finite element modeling), Adams (multibody dynamics), and Simulink (graphical control design) with MATLAB (visualization tools)—expanding the design space for AMB rotor modeling beyond that of available commercial software. In this work, accuracy of co-simulation to theory is validated through a rigid AMB rotor and a hanging disk on a steel wire, and new results are shown for a flexible anisotropic rotor and a simplified touchdown bearing impact test.