Multi-objective Optimization Method for 2-DoF Negative Impedance Electromagnetic Shunt Damper

doi:10.3901/JME.260018

Abstract

Abstract: During the launch and recovery process, carrier rockets face complex dynamic excitations, which can easily cause vibration and impact on the rocket structure and aerospace equipment inside the fairing. Therefore, it is particularly important to design high-performance vibration damping and buffering devices. The negative impedance electromagnetic shunt damper (NIESD) introduces negative impedance into the electrical circuit, reducing circuit resistance and increasing circuit current, thereby enhancing the output of electromagnetic damping force and improving vibration damping and buffering performance. However, in the design process of NIESDs, there are difficulties in balancing inductance, resistance, and stiffness, and the design efficiency is low. This paper proposes a multi-objective optimization method based on NSGA-II for the optimization design of 2-DoF NIESDs. By deriving the resonance amplification factor and high-frequency attenuation rate objective function of the 2-DoF NIESD, the stiffness of the spring is simulated and calculated to determine a reasonable stiffness constraint range, and the voltage lead phase angle is constrained to reduce the selection amount after optimization. Simulation results indicate that with the proposed optimization method, the 2-DoF system can achieve sinusoidal vibration attenuation rates of better than -40 dB at 100 Hz and better than -70 dB at 200 Hz, respectively, while maintaining resonance amplification below 3 dB. It also verifies that the optimized design parameter combination can effectively suppress impact loads. The optimization method proposed can be used for multi-objective optimization design of NIESDs.

Key words: negative impedance electromagnetic shunt damping, multi-objective optimization, vibration damping and buffering

CLC Number:

V421

DU Yongkang, YAN Hao, LIU Xuhui, WANG Youyi, Lü Jun, LI Haojun, WU Jianing, JIAO Xiaolei. Multi-objective Optimization Method for 2-DoF Negative Impedance Electromagnetic Shunt Damper[J]. Journal of Mechanical Engineering, 2026, 62(1): 250-261.

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