Rotordynamics & Controls Engineer — Magnetic Bearings

Sapphire is looking for a rotor dynamics and controls engineer to join the Magnetic Bearing Technology group with primary responsibilities to include rotor dynamics analysis/testing, controller tuning, data acquisition system setup and troubleshooting, prototype machine testing, software development/testing, and field support. Special consideration will be given to those with a background in rotor dynamics, vibrations, controls, electromagnetics, and/or mechatronics. The ideal candidate will possess leadership/teamwork skills, a positive attitude, and a willingness to listen to and learn from others.

To perform this job successfully, an individual must be able to perform the following satisfactorily; other duties may be assigned. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• Perform rotordynamic modelling in tools such as XLROTOR and Matlab suite of rotor dynamics and controls analysis tools.
• Use Matlab to analyze stability and performance of magnetic bearing control system loops, and to design compensators that ensure robust performance.
• Conduct final tuning on the control algorithms based on transfer function measurement, sensor signal time history and power spectrum – in the shop and in the field.
• Participate in design of new magnetic bearing systems for new applications/machines.
• Develop/Modify Labview-based magnetic bearing graphic user interface (GUI).
• Develop and conduct training sessions with field service engineers, test engineers, and technicians.
• Interface with internal and external customers, as required, for field service/applications/product support.

The requirements listed below are representative of the knowledge, skill and ability required.

• Masters or PhD in ME or EE required.
• Minimum of 3 years related experience in dynamics and/or controls required.
• Knowledge of dynamics or controls analysis, especially for rotating machinery (rotor dynamics) required.
• Understanding of control algorithm design (frequency domain analysis) for closed-loop control systems a plus.
• Knowledge of data acquisition systems and instrumentation a plus.
• Familiarity with magnetic bearing controller hardware components (DSP controller, PWM amplifiers, and power supplies) a plus.
• Understanding of magnetic bearing principles and applications a plus.
• Experience with machine-level magnetic bearing system testing and troubleshooting a plus.
• Knowledge of turbo machinery used in aerospace and/or defense industries a plus.

• Ability to multi-task.
• Willingness to listen to and learn from others.

None. Position will interface with field service engineers, test engineers, and technicians during production training/troubleshooting activities. Strong teamwork/leadership skills required.

Work split between office, on-site test lab, and field support activities. Must be willing to travel to support field support activities up to 10% of the time. Ability to lift up to 50 lbs preferred.