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


This thesis focuses on the comprehensive study of controlling a customized Active Magnetic Bearing (AMB) installed on Bently Nevada’s RK4 rotor kit in Cal Poly’s Vibrations and Rotordynamics Lab. The AMB was uniquely designed and manufactured by a Cal Poly senior project team to fit Bently’s rotor kit and the results of this research are distinctive to the custom system. To achieve practical functionality of the AMB system, we designed a controller a Virtual Instrument (VI) using the National Instrument software, LabVIEW. From the experimental study, we calibrated the programming to find unknown parameters of the AMB system and validated the design using a well-established industrial rotordyanmics software, Bentley Nevada System 1. The development of the control programming consists of theoretical analysis (MATLAB/ Simulink) and simulation validation (MSC ADAMS View). Both linear and non-linear models were implemented in MATLAB and Simulink to effectively tune a Proportional-Integral-Derivative (PID) control developed for various AMB models. To validate the theoretical results, we compared them to results from a co-simulation using MSC Adams VIEW, a multi-body dynamics simulation, and Simulink. From experimental trial and error at a shaft rotational speed of 2800 rpm, a 16% decrease in shaft orbit was achieved. These results demonstrate the practicality of the control program and custom AMB rotor kit that can be used for further research.