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Regeneration Mode, Dissipation Mode, and Power Harvesting both Electromagnetic and Magneto-Rheological Shock Absorbers
Current Issue
Volume 5, 2018
Issue 4 (August)
Pages: 44-55   |   Vol. 5, No. 4, August 2018   |   Follow on         
Paper in PDF Downloads: 23   Since Dec. 20, 2018 Views: 994   Since Dec. 20, 2018
Authors
[1]
Ahmed Shehata Gad, Automotive Engineering Department, Helwan University, Cairo, Egypt.
[2]
Helmy Mohamed El-Zoghby, Automotive Engineering Department, Helwan University, Cairo, Egypt.
[3]
Walid Abd El-Hady Oraby, Automotive Engineering Department, Helwan University, Cairo, Egypt.
[4]
Samir Mohamed El-Demerdash, Automotive Engineering Department, Helwan University, Cairo, Egypt.
Abstract
Electromagnetic dampers can be largely classified into two different techniques either the mechanical system or the electrical system. The mechanical system is composed of a permanent-magnet DC motor, a ball screw and a nut, and the electrical system is composed of coils and permanent magnet assemblies. In this paper, the performances of the mechanical system and the electrical system as passive and semi-active techniques are compared with a magneto-rheological damper performance, and the characteristic responses of these dampers are presented. The magnetorheological damper coil is connected with generator coil and this damper is namely in this case a self –power (regeneration mode of a passive case), because the applied current on this damper is dependent on current generated of the generator. The simulated results of the present study are shown that: (i) in passive cases of the electromagnetic dampers; the regenerative power of the electrical system is more than the mechanical system, and the magneto-rheological damper gives a different damping force according to the following conditions: If generated current from the generator less than 2.5V the switch 1 is closed and this current is applied on MR damper coil only, while, if generated current from the generator more than 2.5V the switch 1 is opened, and the current applied on an MR damper coil is turned off, but switch 2 is closed to charge the battery. (ii) In semi-active cases of the electromagnetic and magneto-rheological dampers; the Adaptive Neuro-Fuzzy Inference System (ANFIS) inverse models are introduced as the dampers controller, however, the magneto-rheological damper needs power over than electromagnetic dampers both mechanical and electrical systems.
Keywords
Electromagnetic Dampers, Magneto-rheological Damper, Passive Cases, Regenerative Power, Semi-active Cases, Controllable Power
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