汽车电子控制系统驱动保护电路的分析与设计

本文介绍了汽车电子控制系统驱动保护电路的设计,给出其各个组成模块的实例.     

传感轮自动测试装置研制

介绍了汽车用传感轮及配套的传感器的结构和工作原理,提出了一种面向角度和波形的自动测试方法,并据此设计了自动测试装置,最后以一个实例论证了传感轮测试装置的实用性。     

結合AutoCADVBA提升ANSYS分析建摸效率

渐开线花键冷槎成形工艺是一种精密塑性成形加工工艺.为探索齿条形刀具的角度的变化对渐开线花键成形结果的影响,采用ANSYS软件,基于北方易初和洛阳工学院合作已经研制成功的搓挤摩托车曲柄渐开线花键的齿条形刀具,变更刀具齿形角分别进行成形过程仿真并进行结果分析比较;刀具齿数多,形状复杂且整个研究过程将需要多次进行刀具建模,若在ANSYS中建模则非常费时费力,故选择AutoCADVBA编程实现刀具的参数化绘图造型而后导入ANSYS的方法.每运行一次AutoCADVBA宏程序,即可方便快捷地得到一把不同的虚拟刀具,大大提高整个研究进程的效率,同时也为类似问题的研究提供了一种有效的参考途径.     

Development of a Knowledge-Based Process Planning System for an Auto Panel

Challenges and pressures from the growing globalisation of markets have made automotive enterprises shorten the product development cycle time and reduce costs through the increasing use of mathematics-based tools and processes. In order to bridge the gap between experience-based design and science-based engineering, this paper establishes a knowledge-based process planning system to fully support auto panel die development and design automation. The framework of this novel system is proposed, and key issues, such as knowledge acquisition, knowledge representation and knowledge-based design are described in detail. The function model of the system is proposed to illustrate the architecture and functionality of the system. The system provides users with just-in-time access to the appropriate knowledge and information to reduce the search burden. A practical example is used to show the great advantage of the knowledge-based process planning system.     

基于AutoCAD环境的工程图纸自动排版系统的设计

针对目前企业大量电子图纸打印输出的现状,为了降低打印成本和重复性的劳动,并缩短产品的设计周期,在AutoCAD环境下,采用ActiveXAutomation技术开发工程图纸自动排版系统的方法,重点对系统的设计思路、算法设计和界面设计进行了阐述,该系统目前已在多家企业得到应用,并取得了很好的效果。     

锥面活塞环自动分选机的研究

介绍一种用于锥度检测的锥面活塞环自动分选机。它的控制、数据采集、信号处理都由计算机完成 ,并具有故障诊断、误差补偿、报警、测量结果显示、打印等功能。     

自回归谱的分形特性在状态监测中的应用研究

研究了机械设备在工作状态下噪声信号自回归谱的分形特性，提出可以用关联维数描述设备的工作状态特征，进而对工况进行识别，实验表明，机械设备在相同的工作状态下，噪声信号的自回归谱有相近的关联维数，而在不相同状态下则有明显不同的关键维数，关联维数可作为机械设备状态的重要依据，能够有效地补充其他特征提取方法的不足。     

开发Auto CAD的几种接口方式比较

实现计算机辅助设计与制图的主要问题是高级语言与ＡｕｔｏＣＡＤ的接口问题．本文介绍了几种接口方式及其差别．     

One-step solution auto-combustion process for the rapid synthesis of crystalline phase iron oxide nanoparticles with improved magnetic and photocatalytic properties

We report the solution auto-combustion (AC) process for the rapid synthesis of Fe₃O₄ nanoparticles derived from the sol–gel (SG) process. The citric acid (CA) and tartaric acid (TA) is used as gelling agents in the SG process, where the citric acid turns into a fuel that combusts the gel and yields a highly magnetic crystalline phase Fe₃O₄ nanoparticles in one step with an average particle size of 50 nm. In contrast, the citric acid at different concentrations and tartaric acid at any concentrations do not lead to any combustion process and yield amorphous iron oxides. Upon annealing, these CA and TA derived iron oxide samples are turned to crystalline phase α-Fe₂O₃ particles. In contrast, the as-synthesized AC sample (i.e. Fe₃O₄) is oxidized to γ-Fe₂O₃ phase, which is confirmed from their respective XRD, Rietveld refinement and XPS studies. All the synthesized iron oxide phases showed broad visible light absorption. The room temperature M?H hysteresis curves obtained from VSM revealed that the Fe₃O₄ and α-Fe₂O₃/γ-Fe₂O₃ phases exhibit super-paramagnetic and ferromagnetic properties, respectively. The photocatalytic efficiencies of the samples are found to be in the order of Fe₃O₄ > γ-Fe₂O₃ > α-Fe₂O₃ with 98, 87, 79/73% degradation of rhodamine B dye at the end of 3 h and H₂ evolution rate over these systems is found to be 2.1, 1.3 and 0.92/0.89 mmol/h/g, respectively under simulated solar light irradiation. The photocatalytic recycle studies demonstrated that all the synthesized photocatalysts possess excellent chemical and photo-stabilities.     

柜式空调器室外风机自动调速电路

以宝花ＲＦＤ－１２Ｗ柜式空调器为例,详细介绍了其室外风机自动变速的工作原理。