Research on the Vibration Reduction Effect of Variable Damping and Stiffness Electromagnetic Damper Ocean University of China, College of Engineering

Format:

Book

Conference/Event

Author/Creator:

Zhan, Haoyu, author.

Contributor:

Du, Haiping

Liu, Pengfei

Ning, Donghong

Yu, Jianqiang

Conference Name:

SAE 2023 Intelligent Urban Air Mobility Symposium (2023-10-20 : Hangzhou, China)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2023

Summary:

This paper studies and compares the vibration control performance of variable damping electromagnetic damper (VD-EMD) and variable stiffness and damping electromagnetic damper (VSD-EMD), and explores the advantages of VSD-EMD over VD-EMD in terms of controllability and improvement of ride comfort. In VD-EMD, a variable resistor is connected to the DC motor, the equivalent damping is related to resistance but not to frequency, by adjusting the resistance of the variable resistor, the damping of VD-EMD can be changed. In variable stiffness electromagnetic damper (VS-EMD), a branch formed by connecting a variable resistor and an inductor in series is connected to the DC motor, by adjusting the variable resistor, the equivalent stiffness of VS-EMD can be controlled, in addition, the equivalent stiffness also varies with the excitation frequency. The mechanical characteristics of VD-EMD and VS-EMD have been verified. Since shock absorber with multiple variable mechanical characteristics can achieve better vibration reduction effects, the variable stiffness and damping functions of VSD-EMD has been achieved by paralleling the circuits of VD-EMD and VS-EMD. To compare the vibration control effects of VD-EMD and VSD-EMD, they are applied to a quarter car model. A sliding mode controller is designed and two semi-active control strategies are applied to control the vibration of vehicles by VD-EMD and VSD-EMD respectively. Under sinusoidal excitation, the effectiveness of the control strategies is verified and the peak acceleration of the sprung mass of VSD-EMD has decreased. In addition, the output force of VSD-EMD has a longer tracking time for the ideal force which means that VSD-EMD has higher controllability. Under random road excitation, VSD-EMD has better vibration reduction effects in the frequency range of 0.1-2.5, 7.5-10, and above 22 Hz. In addition, the root-mean-square of VSD-EMD's sprung mass decreased by 12.9% compared to VD-EMD. Electromagnetic damper with variable damping and stiffness functions can broaden the vibration reduction range and achieve a better vibration reduction effect

Notes:

Vendor supplied data

Publisher Number:

2023-01-7079

Access Restriction:

Restricted for use by site license