磁流变液阻尼器三段线性变阻尼模型及试验验证

Three-segment Linear Variable Damping Mechanical Model for Magneto-rheological Fluid Damper and Test Verification

自行研发了一个最大出力约为10 kN的磁流变液阻尼器(MRFD),基于阻尼器的力学性能试验结果,分析最大阻尼力随速度和电流的变化规律,提出了一种适用于控制器设计的简便高效MRFD唯象模型-三段线性变阻尼恢复力模型,并对模型参数进行识别,数值与试验结果对比分析表明该模型可较精确地模拟MRFD的非线性力学性能。基于该三段线性变阻尼恢复力模型可方便数值求解阻尼器逆模型,阻尼器力学模型的研究思路可应用于其他具体研发的磁流变液阻尼器中。

The magneto-rheological fluid damper with maximum force capacity of 10 kN was self-developed.The mechanical property test of the MRFD was carried out. Based on the analysis of the test results, the variation of the maximum damping force with velocity and current was investigated. Subsequently, a simple and efficient MRFD phenomenological model for controller design was proposed, which is named the three-segment linear variable damping mechanical model. The model parameters were also identified. The comparison between numerical and experimental results showed that the three-segment linear variable damping mechanical model cansatisfactorily simulate the nonlinear mechanical behavior of the MRFD. In addition, it is convenient to analytically calculate the inverse model of the damper by employing the three-segment linear variable damping mechanical model. The research strategy of the mechanical model of the self-made MRFD can be applied to other specific MRFDs.