Affiliation:
1. Ocean University of China, College of Engineering
2. Ocean University of China
3. China Nanhu Academy of Electronics and Information Technolog
4. University of Wollongong, Faculty of Engineering and Informa
Abstract
<div class="section abstract"><div class="htmlview paragraph">This article proposes an electromagnetic damper (EMD) based on a ball screw
mechanical structure actuator. To prove the damping effect of the new damper
proposed in this paper. In this paper, the EMD suspension is validated on a
quarter vehicle suspension. A mathematical model of quarter vehicle suspension
is developed and a sliding mode variable structure controller is designed. This
sliding mode controller enables vibration control of the suspension and improves
ride comfort. To make the EMD track the ideal current effectively, a variable
resistance circuit that can change the electromagnetic damping force is proposed
to achieve the graded adjustment of resistance. A semi-active vehicle vibration
control strategy was designed, and experiments were conducted using a
quarter-vehicle test platform to verify the vibration-damping performance of
this EMD suspension. The energy transfer to the road was analyzed and the higher
the variable resistance, the more energy is transferred to the vehicle. The
experimental results show that the EMD suspension reduces the acceleration RMS
by 25.53 %, 23.57 % and 16.48 % under sinusoidal, bump and random road
conditions, respectively, compared to the passive suspension. This ensures that
the dynamic travel of the suspension and the dynamic loading of the tire is
within reasonable limits. The energy of the road surface, the energy consumed by
the EMD, the energy transferred to the tire and the energy of the vehicle were
also analysed. The experimental results show that the lower the resistance in
the EMD circuit, the less energy is transferred to the vehicle, and that the EMD
suspension reduces the energy transferred from the road surface to the vehicle
by 8 % compared to the passive suspension under random road conditions. The
experiment proves that it greatly improves the comfort of the vehicle while
ensuring the stability of vehicle control.</div></div>
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