Development of a Semi-Active Electromagnetic Vibration Absorber and Its Experimental Study

Area of Science:

• Mechanical Engineering
• Control Systems
• Electromagnetism

Background:

• Traditional vibration absorbers often lack adaptability to changing frequencies.
• Adjustable stiffness is crucial for optimizing vibration absorption across various operating conditions.
• Electromagnetic principles offer a promising avenue for dynamic stiffness control in vibration mitigation devices.

Purpose of the Study:

• To develop and validate a semiactive electromagnetic vibration absorber with an adjustable stiffness spring.
• To investigate the vibration control effectiveness through simulation and experimental analysis.
• To determine the optimal parameters and performance range of the developed vibration absorber.

Main Methods:

• Design and simulation of an electromagnetic stiffness adjustable spring model.
• Finite element analysis (FEA) of the test bench to understand vibration characteristics.
• Experimental validation using a built test rig to assess vibration reduction performance.

Main Results:

• The developed semiactive electromagnetic vibration absorber demonstrated a tunable frequency range from 21 Hz to 25 Hz.
• Significant vibration reduction, measured between 5 dB and 10 dB, was achieved within the adjustable frequency range.
• Optimal control positions for maximum vibration suppression were identified through simulation.

Conclusions:

• The proposed electromagnetic stiffness adjustable spring model provides an effective solution for tunable stiffness in vibration absorbers.
• The developed semiactive electromagnetic vibration absorber shows practical effectiveness in reducing vibrations.
• This technology offers a new approach for adaptive vibration control in dynamic systems.