铁道车辆轮对超声波探伤半轴试块的研制

主要介绍了RD2、提速车和DF4轴型超声波探伤半轴试块的研制，同时介绍了主要的技术要求及制作工艺。该试块适用于在役轮轴超声波探伤，为现场检测提供了统一的探伤基准。     

Towards identifying the roll motion parameters of a motorcycle simulator

This study aimed at identifying the roll motion parameters of a motorcycle simulator prototype. Experienced motorcyclists tuned the angular physical movement of the mock-up and that of the visual scene to achieve an optimal riding experience during curves. The participants exceeded the rolling angles that would be required in real-world riding, while avoiding leaning the mock-up beyond 10°. In addition, they were more influenced by the speed of the virtual motorcycle than by road curvature, especially in a wide field of view. Heterogeneity was found in the roll applied to the visual scene. The overall patterns suggest that at least when washout is not applied to remove the side forces that in real-world riding are compensated by a centrifugal force, greater roll of the visual at the expense of the mock-up is mandatory to avoid performance biases that might be enhanced due to fear of falling off the simulator. Future roll motion models must take into consideration factors such as riding postures, which might not only influence the forces operating on the rider-motorcycle system, but also how motorcyclists perceive the visual world.     

Evaluation of four steering wheels to determine driver hand placement in a static environment

While much research exists on occupant packaging both proprietary and in the literature, more detailed research regarding user preferences for subjective ratings of steering wheel designs is sparse in published literature. This study aimed to explore the driver interactions with production steering wheels in four vehicles by using anthropometric data, driver hand placement, and driver grip design preferences for Generation-Y and Baby Boomers. In this study, participants selected their preferred grip diameter, responded to a series of questions about the steering wheel grip as they sat in four vehicles, and rank ordered their preferred grip design. Thirty-two male participants (16 Baby Boomers between ages 47 and 65 and 16 Generation-Y between ages 18 and 29) participated in the study. Drivers demonstrated different gripping behavior between vehicles and between groups. Recommendations for future work in steering wheel grip design and naturalistic driver hand positioning are discussed.     

尼龙/聚丙烯合金的性能与制备

介绍国外各种尼龙/聚丙烯合金的性能和制备工艺。聚合物合金的相容性原理,以及PA/PP合金适用的各种相容剂。     

用VC062型聚合管生产尼龙6高粘切片

用VC062型聚合管生产纺制帘子线用尼龙6高粘切片。对设备及工艺进行了改造,提高进料管的物料温度,提高物料在前聚合器的开环速率,增加排水措施,促进VK管中产物分子量的提高。     

旋转变压器信号的标定与解调

针对检波后信号存在直流偏置、幅值不等和相位偏移等问题,采用梯度估计算法,对检波后的包络信号进行离线标定;并设计了基于状态观测器的旋转变压器-数字转换(RDC)算法,对标定后的包络信号进行解调.试验结果表明,梯度估计算法收敛速度快,估计精度高.与反正切法相比,所设计的RDC算法不需通过数值差分即可获得角速度信息,干扰抑制能力强,角位置和角速度估计精度高.     

电子横移伺服LQR最优控制器设计

为了提高系统的稳态精度和动态性能,将LQR最优控制算法应用于高速经编机电子横移伺服控制系统.建立了伺服系统状态空间模型,引入了一类具有指数衰减度的二次型函数作为系统性能指标.仿真结果表明,所提出的电子横移伺服LQR最优控制算法易于工程实现,保证了系统的稳定性,具有良好的频响特性,改善了系统的动态特性,实现了无静差高精度控制.     

服装设计的误区

通过对服装院校和企业进行田野式调查。归纳梳理出服装专业院校和企业存在的典型问题,认为当下服装教学的方法和内容中缺少自身的专业性。仍有沿用普通美术教学和与其他工业产品设计教育同质化的现象;服装企业里设计方法值得探讨,规范的程式化在有利于企业管理的同时也限制了服装设计的创新发展。设计者需以人为本。以美为据。设计同技术紧密结合才能避免踏入服装设计的误区。     

CAE技术在解决胶带座注塑缺陷中的应用

介绍了CAE技术在注塑产品生产中的应用。针对胶带座在注塑成型过程中产生的缺陷，借助CAE软件验证了产生缺陷的位置，找出了产生缺陷的原因。并在工艺、模具和产品设计上进行了修改，从而解决了实际生产中遇到的问题，为实际生产提供了指导。     

基于COM的数据自动化处理技术在工程变形监测中的应用

现代施工技术需要及时、准确的报告出对工程建筑物关键部位的变形情况。传统的依赖办公自动化软件对监测数据进行简单的处理,已经满足不了实际需求。本文以具有特殊结构的合肥渡江战役纪念馆主体工程为应用背景,阐述了如何针对具体的监测项目,基于COM技术及office对象模型,二次开发生成数据处理程序,采用本高级数据自动处理方案,极大的提高了变形监测数据处理的效率。对类似工程的数据处理,具有很好的借鉴意义。