According to the working modes of mr devices , combining the ohm ' s law of magnetic circuit and the design theory of non - steady magnetic circuit , magnetic structures of the automotive damper have been worked out . to emulate the performance of conventional shock absorber , two automotive mr dampers were designed and fabricated at chongqing university . an applied magnetic field increase the yield stress of mr fluids in flow annular passages , which alters the velocity profile of mr fluid in the passages and raise the pressure gradient between low cavity and high one at some given flow rates 根据磁流变阻尼器工作模式,利用磁路中的欧姆定律和动态磁路设计原理,结合汽车悬架的技术要求和结构特点,提出了基于剪切模式和流动模式共同作用(混合工作模式)的汽车磁流变阻尼器设计原理,讨论了阻尼器动态磁路设计中的若干技术问题;根据流体力学navier - stokes方程,分别利用newton流体特性和bingham流体特性,推导了基于平板模型和轴对称模型的流变学方程,得出了阻尼器阻尼力的计算方法。
Through calculation on varied parameter , a group of suitable parameter is found out . the results of experiments indicate that the theoretical analysis to the magnetic field of the magnetic structure is proper . to remove the result error come from the change of gap between piston rod and sensor , a signal processing method accompanied with machine learning process is researched 为消除传感器与磁性标尺之间间隙变化对测量结果的干扰,将示教学习方法引入行程传感液压缸的信号处理过程,并使用改进的遗传算法解决自学习过程中周期曲线的拟合问题,提出了双传感器轴向直线布置方法和基于自学习过程的信号处理方法,通过实验,达到了显示精度0 . 01mm ,测量重复精度0 . 2mm的良好效果。
The control system , machinery and magnetic structure of giant magnetostrictive inchworm motor ( gmim ) have been designed based on the controlling theory , characteristic of giant magnetostrictive material and performance index of the subject . the mathematic model of the inchworm motor has been founded and the simulation of characteristic has been carried out 根据自动控制原理,结合超磁致伸缩材料的磁特性,按照课题给定的性能指标,对超磁致伸缩爬行电机的机械结构、磁路结构和控制系统进行了初步设计;建立了整个电机系统的数学建模,并对系统特性进行了仿真分析。
The results of the experiments indicate that the theoretical analysis to the magnetic field of the magnetic structure is proper . in the fourth chapter : research on the signal processing method accompanied with machine learning process to remove the influence of the gap change between piston rod and sensor 第四章:在行程传感液压缸的行程测量过程中,使用单个传感器很难消除端盖与活塞杆之间的间隙对测量结果造成的影响,而且无法判断活塞运行方向,所以,需要使用多传感器技术。
The term magnetic structure of a material pertains to the ordered arrangement of magnetic spins, typically within an ordered crystallographic lattice. Its study is a branch of solid-state chemistry.