Abstract:A novel magnetorheological damper (MRD) integrated with controllable damping, displacement selfinduced and vibration energy harvesting ability was proposed to solve the problems of simple function integration and low efficiency of vibration energy harvesting in conventional MRD systems. The working principle of the proposed MRD was analyzed, especially the principle of vibration energy harvesting device with a single induction coil and a double induction coil, and winding frame with a nonmagnetic and a lowmagnetic material were explained in detail. Then, the vibration energy harvesting device with the single induction coil and double induction coil was simulated by ANSYS software. The prototype of the proposed MRD was manufactured, and the experimental test system was also set up. Afterwards, the energy harvesting performance of the developed MRD with the single induction coil and double induction coil was experimentally tested, respectively. The experimental results showed that the induced voltage with the double induction coil was 2512V and the energy harvest power with the double induction coil was 1.5W under the sinusoidal displacement excitation with 7.5mm amplitude and 4Hz frequency, and the energy harvesting efficiency was about twice of that with the single induction coil. In addition, the energy harvesting efficiency with the nonmagnetic and lowmagnetic winding frame of the proposed MRD was almost the same.