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TransientvibrationanalysisandcontrolTransientvibrationanalysisandcontrol
影响因子Impact factor1、Transient vibration analysis and control on a horizontal axis washing machine during spin-drying process在水平轴上旋转干燥过程中洗衣机的瞬态振动分析与控制。To control the transient vibration during the spin-drying process of a horizontal axis washing machine, a planner model was built for the machine installed with MR dampers. Numerical simulations, considering the acceleration stage as a process following an exponential curve, were carried out and the relation between the maximum vibration amplitude and the time constant of the exponential curve was studied. The average value of the maximum vibration amplitudes under several different rotation speeds was calculated, and the variations of the average value along with the increase of clothes mass and control current of MR dampers were analyzed. The results show that the control current of MR dampers has little influence on the optimal time constant, and for clothes with mass of 1 to 9 kilograms, the time constant can be set at 0.7 to achieve a good comprehensive control result. Besides, a simple control strategy of MR dampers considering both the vibration suppression at transient stage and the vibration isolation at steady stage was proposed. The short time Fourier transform was employed for tracing the vibration frequency of tub, once the frequency grows bigger than a preset value, the control current of MR dampers turns from the maximum value to the minimum one for vibration isolation. The control effect was proved by numerical simulations对脱水过程中的一个水平轴洗衣机在瞬态振动控制,建立了机安装MR阻尼器是一种规划模型。数值模拟,考虑加速阶段作为一个过程遵循指数曲线,进行和之间的关系的最大振动振幅和时间常数的指数曲线研究。在几种不同的转速计算的最大振幅的平均值,并且随着衣服的质量和MR阻尼器的控制电流的增加的平均值的变化进行了分析。结果表明,MR阻尼器的控制电流具有最佳的时间常数的影响不大,与1至9公斤质量的衣服,时间常数可以被设置在0.7达到一个很好的综合控制效果。此外,一个简单的控制策略的磁流变阻尼器考虑振动抑制在过渡阶段和稳定阶段的振动隔离了。短时傅里叶变换是用于跟踪的桶的振动频率,当频率变得大于预定值时,MR阻尼器的控制电流从最大值到最小一个振动隔离。控制作用是通过数值模拟证明2、Sensorless support control of thin-steel-plate using the real-time vibration analysis technique使用实时振动分析技术的无位置传感器控制薄钢板支撑Thin-steel-plates are used in the space
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