不同冷板布置方式的冷板车内温度场模拟

目的为防止铁路冷板冷藏车在运输货物时发生货物腐烂变质,研究冷板在侧置、顶置不同的布置方式时车厢内温度场分布和变化规律及主要影响因素.方法应用有限元法,对冷板侧置、顶置及在不同冷板冻结温度和储藏食品温度下的冷板车车内温度场进行数值模拟.结果得出车厢内主要代表截面和代表点的温度随时间的变化情况,对于冷板侧置无论运输冻货还是冷藏货物都是车厢下部货物温升高于其他处货物的温升,尤其紧靠车门下部的货物温升最高;冷板顶置时在相同条件下总比冷板侧置时温升高.结论冷冻货物与冷藏货物的温度变化趋势是一致的.温度场模拟为开发方便高效的冷板冷藏车提供技术依据.     

轿车轮毂实体模具设计及方法研究

从轿车轮毂实体结构出发,探讨轿车轮毂模型及模具的设计研究方法．从而实现轿车轮毂模型及模具的生成、修正,并为模具的数控加工奠定基础．     

基于专家系统的混合无功补偿控制的研究

针对煤矿大型掘进设备起动运行过程中产生的大量无功功率和谐波污染对控制系统构成较大干扰的问题,提出了一种基于专家系统的混合动态补偿控制系统方案。系统由晶闸管投切电容器(TSC)离散子系统和静止无功补偿器(SVC)连续子系统构成。同时利用专家系统学习方法,延长了电容器的寿命。     

多传感器数据融合在小车避障上的应用

介绍了多传感器数据融合技术的基本原理,研究了它在小车自主探测避障上的应用,并给出了基于六个超声波检测模块的自主探测避障小车的硬件设计以及软件设计。经过实物测试反映,该方案能够满足小车自主探测避障的需求,精准度更高。     

Customizable hardware design of fuzzy controllers applied to autonomous car driving

Nowadays, final products often encompass a certain intelligence therein to deal with variation or lack of precision in the sensing input data. This intelligence is usually acquired via the utilization of existing soft techniques, such as artificial neural networks, genetic algorithms and fuzzy control, among others. Thus, it is profitable to have on-the-shelf shell scalable and adaptive hardware designs that implement these soft techniques. This availability allows for an immediate embedding of any of those designs onto final products. This usually entails a reduced time-to-market of the product. Process control is one of the many applications that took advantage of the fuzzy paradigm. In general, controllers are embedded into the controlled device. This paper presents a novel design of a reconfigurable efficient parallel architecture to implement fuzzy controllers on hardware with almost no design effort for final users. The proposed architecture is herein proven suitable for embedding. It is customizable, so it allows the setup and configuration of the controller parameters, and hence its use for any problem application. Two fuzzy controllers that model autonomous car driving are implemented and their cost and performance evaluated.     

PLC在POLO轿车密封条生产线中的应用

本文介绍了PLC控制系统在POLO轿车密封条生产线中的应用，PLC的硬件配置，软件设计思想，模块化的程序结构，以及人机界面的设计。     

Participation in workplace design with reference to low back pain: a case for the improvement of the police patrol car

Thirty Canadian police officers, divided into six groups, participated in the redesign of the interior of the patrol car. Three of the groups consisted of individuals having a history of low back disease. The effect of participating in a design process on the characteristics of the final design and on the perception of the low back pain was studied in a semi-experimental setting. The participants developed a strong commitment to the participatory design process, which was reflected in their productions. The differences between participants with and without a history of a low back disease was not marked. The former tended to stress posture-related elements in their analysis and design.     

轿车制造操作时间定额标准的编制研究及作用

应用工业工程的方法和技术对轿车制造过程中影响操作时间的因素进行了分析,结合标准化的基本原理对这些因素进行了统一、优化,提出了因素值的确立、验证和测量方法,并根据确定的标准理论值进行了作业时间改进分析和实际应用举例,最后简单说明了轿车操作时间定额标准的重要作用。     

车载音频系统的自动增益补偿设计

针对传统车载音频系统不能自动适应不断变化的车内声音环境的问题,设计了基于DSP技术的自动增益补偿。首先测试分析当前多媒体播放音量和车内噪声等关键因素对车内收听效果的影响,然后自动调节车载音频系统的增益和滤波器参数值,尤其对音量和响度进行动态补偿,最终确保在不断变化的车内环境中高音质的听觉享受。实车测试表明,该设计能有效地减少车内噪声影响,满足车内听觉频响特性。     

武钢自备车转8A转向架检修的探讨

对武钢自备车转8A转向架检修工装、工艺及现状进行分析探讨,寻找适合武钢运行条件及现状的转向架检修方法。