ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Abstract
In order to develop a smaller magnetorheological fluid (MRF) damper and its corresponding analysis software, a new MRF damper with outer-coils and testing system was designed. The testing results show that the MRF has good mechanical properties when the damping gap is 1.5mm. The smoothing damping force is only 1.0-4.0N by adjusting the coil current from 0A to 2A, and it is linearly related to current through data fitting. The damping force versus velocity curve has obvious hysteresis characteristic, and an improved nonlinear dynamic model is proposed. Based on the model and linear function, electromechanical characteristics of the MRF damper can be simulated by Simulink, which provides an analysis platform for applications of the damper.
CONCLUSION
The novel outer coil mode was confirmed, promoting the development of the smaller MRF damper. The MRF damper with 1.5mm damping gap has good electromechanical properties. In this paper, by reducing the size of the MRF damper, the smoothing damping force was reduced to 1N-4N. It was found that the damping force has a linear relationship with the current, and this relation can be expressed by primary curve. The damping force shows obvious hysteresis with the increase of velocity, this phenomenon is becoming more and more significant with the increase of current and frequency. There is no obvious relationship between damping force and frequency, frequency has little effect on the damping force-displacement curve. The damping force of the MRF damper can be expressed by a nonlinear dynamic model. Simulink simulations show that the model is in good agreement with the experimental curves. For this reason, an analysis software was developed to promote the MR theory and technology improvement.