Force-electrical characteristics of a novel mini-damper

摘要

In order to develop small loading and small damping, a small magneto-rheological fluid (MRF) damper with built-in magnetic coils is researched, and the dynamics model of new mini-damper is established based on testing the mechanical properties of the damper. It is found that the damping landing force adjustable range will be best when the damping gap is 1.5 mm. The loading force of the mini-damper is only 1.95 N-8.25 N by adjusting the coil current from 0 A-0.8 A. The smooth damping force is the third-order function with the current by polynomial fitting of the experimental data. The result of dynamics tests shows hysteresis damping characteristics, and an improved nonlinear dynamic model is proposed by combining with the structure characteristics. The parameters of the improved dynamic model are identified by using parameter identification and regression fitting. It will provide the basis for the application of the mini-MRF damper.