Abstract
Many energy-harvesting shock absorbers have been proposed in recent years, the most popular design is the electromagnetic harvester including linear electromagnetic shock absorbers, rotational electromagnetic shock absorbers, the mechanical motion rectifier (MMR), and the hydraulic-electromagnetic energy-regenerative shock absorber (HESA). With different energy converting mechanisms, the complicated effects of the inertia and nonlinear damping behaviors will greatly influence the vehicle dynamic performance such as the ride comfort and road handling. In this paper, we will theoretically analyze the dynamics of the suspension system with the HESA and give a guide for the HESA design. Then a simulation model of the HESA is built in AMESim to make comparison studies on the different vehicle dynamics caused by the nonlinear damping behaviors of the HESA. The advantages of HESA in terms of ride comfort and road handling will be evaluated in comparison with the similar design without accumulators and the traditional oil shock absorbers.
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