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1.
车用磁阻传感器式电子罗盘系统的开发   总被引:1,自引:0,他引:1  
基于磁阻传感器HMC1055的带姿态补偿功能,开发了包含信号放大和置位/复位模块的三维罗盘系统的硬件电路,并提出了干扰校正的软件算法以适应车内复杂的动态工作环境。  相似文献   
2.
应用有限元方法和可靠的结构分析程序,对十字轴式万向联轴器进行了必要的分析计算,得出了避免共振的参考数据。  相似文献   
3.
为实现不同冲击载荷下的吸能管结构逆向设计,应用复合材料强度和刚度理论,计算得到树脂基纤维增强复合材料正交各向异性的力学参数,同时应用非线性显式有限元算法模拟了轴向冲击载荷作用下管件的动态断裂过程。根据正交设计原理,得到了管件比吸能与其几何参数之间的非线性映射关系,并构造出了相应的响应表面。按照汽车正面碰撞对冲击加速度的...  相似文献   
4.
应用有限元方法和可靠的结构分析程序,对十字轴式万向联轴器进行了必要的分析计算,得出了避免共振的参考数据。  相似文献   
5.
刘学  孙凌玉  季学武 《信息技术》2007,31(6):83-85,89
为了满足电动助力转向电感式转矩传感器的需要,设计了一种简单、实用的正弦振荡器。该振荡器采用结型场效应管的压控电阻特性设计自动增益控制电路,通过合理选择元器件的参数抑制了信号幅度的温漂。实验表明,振荡器的输出信号幅度稳定、失真小,满足传感器振荡器的性能要求。  相似文献   
6.
电动助力转向系统电感式转矩传感器的研究   总被引:2,自引:0,他引:2  
转矩传感器是汽车电动助力转向(EPS)系统的关键部件之一,其输出特性直接影响到EPS系统的控制性能.本文介绍了一种电感式转向盘转矩传感器原理,采用Ansoft对其磁场进行了分析,设计了传感器的信号调理电路,并通过实验对传感器的输出进行了标定,给出了传感器的输出特性曲线.实验结果表明,传感器各项性能满足EPS系统的要求.  相似文献   
7.
The excellent mechanical properties of carbon nanotubes make them potential candidates for engineering application. In this paper, the impact and failure behaviors of single-walled carbon nanotubes (SWCNTs) are investigated. The effects of diameter, length, and chirality on their energy absorption characteristics under lateral impact and axial crush are studied. By integrating the principle of molecular structural mechanics (MSM) into finite element method (FEM), the locations and directions of fracture process can be predicted. It is shown that the specific energy absorption (SEA) of SWCNTs is 1–2 order of magnitude higher than that of the ordinary metallic materials and composites in axial impact, indicating that carbon nanotubes are promising energy absorption materials for engineering applications.  相似文献   
8.
汽车车身结构动力学建模方法研究   总被引:12,自引:0,他引:12  
基于汽车车身结构中点焊连接界面的特性,提出了其动力学建模的简化原则,并以依维柯轻客车为对象,建立了车身结构的有限元模型, 其动态分析结果显示与车身在运行中的状态特征是一致的, 证明了所建车身动力学模型的正确性, 这为今后新车身开发打下了良好的技术基础。  相似文献   
9.
The multi-scale modeling method was utilized to study the bending characteristics of a carbon nanotube(CNT)and CNT-reinforced composites.Through combining molecular dynamics and continuum mechanics,the tensional and flexural modulus of a CNT were calculated by a finite element model constructed by reticulate beams with solid cylinder shape and energy equal to C-C bonds.Then,another beam element with hollow cylinder shape and equivalent stiffness was utilized in place of a CNT in a matrix,thus,a multi-scale representative volume element(RVE)model of CNT-reinforced composite was established.Using this RVE model,the bending behavior of CNT-based composites was analyzed.The influence of diameter D,length L,aspect ratio L/D,volume fraction,chiral of CNTs and shape of RVE as well as the arrangement of CNTs in matrix on the reinforcement effect of flexural modulus of resultant nanocomposites were further discussed.The obtained data provide useful information for the design of CNT-reinforced composites.  相似文献   
10.
To understand the relationship between the collapse mechanisms and geometry parameters of sandwich plate with two aluminum alloy faces and one polyurethane foam core, samples subjected to three-point bending loads were studied through simulation, test and analytic methods. Based on published papers, the dimensionless values of limit loads for different failure modes were modified according to real test condition. The load-deformation relation from the analytical formulae was compared with that from experimental and numerical results. A mechanism map was provided to reveal the dependence of the dominant collapse mechanism upon the geometry parameters of the face and the core. The results show that the prediction accuracy was high only if the face thickness was much smaller than the core thickness.  相似文献   
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