A Vibration Sensor-Based Method for Generating the Precise Rotor Orbit Shape with General Notch Filter Method for New...

Area of Science:

• Mechanical Engineering
• Rotary Machinery Dynamics
• Experimental Testing

Background:

• Rotor seal behavior verification is critical for rotary machine performance.
• Accurate experimental data requires controlled rotor vibration patterns.
• Active magnetic bearings (AMBs) offer advanced control over rotor dynamics.

Purpose of the Study:

• To develop and validate a precise method for generating specific rotor vibration patterns using AMBs.
• To enable accurate comparison between analytical and experimental rotor seal properties.
• To address the challenge of generating exact rotor orbit shapes for seal testing.

Main Methods:

• Utilizing active magnetic bearings (AMBs) as both rotor support and vibration exciter.
• Implementing a generalized notch filter to compensate for unwanted harmonic vibrations.
• Introducing a novel modified generalized notch filter for controlled harmonic vibration generation.
• Simulating the generalized notch filter algorithm to confirm functionality.
• Experimentally verifying the algorithm on a test rig with AMBs and vibration sensors.

Main Results:

• The novel modified generalized notch filter successfully generates desired harmonic rotor vibrations automatically.
• Precise control over rotor orbit shape generation was achieved using AMBs.
• Experimental data confirmed the algorithm's effectiveness in precise rotor orbit generation.
• The method allows for accurate compensation of undesired vibrations and targeted excitation.

Conclusions:

• The developed generalized notch filter method provides a robust solution for precise rotor orbit shape generation in AMB systems.
• This technique is essential for accurate experimental verification of rotor seal behavior and dynamics.
• The findings facilitate improved testing methodologies for components in rotary machines.