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内燃机摩擦学智能设计中人工神经网络的应用 总被引:2,自引:0,他引:2
开发内燃机摩擦学智能 CAD系统 ,除建立符号模型、数学模型之外 ,需要建立人工神经网络模型 ,将大量隐含于数值分析和试验数据中的隐性知识转化成显性的设计规则。文中提出了智能 CAD系统中人工神经网络的应用模型 ,并应用于内燃机活塞功耗的分析和规则提取 相似文献
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介绍一种基于串行总线和虚拟仪器技术的内燃机测控系统,系统由上位机和完成测控功能的智能测控节点构成,智能检测节点通过485串行总线与上位计算机相连,构成一种基于串行总线的分散式高精度内燃机参数检测与功率测量系统。上位机主要负责人机交互、数据记录、状态监测、功率测量与计算和系统管理的任务,由智能检测节点构成的下位机接收上位机的指令,控制柴油机的转速、测功机的功率控制和整个系统的状态参数的检测与数据上传工作。利用图形化的虚拟仪器开发平台LabVIEW开发了上位机的软件应用程序。该系统已开发完成并应用于柴油机的实验过程中,其成果对其他总线类型内燃机监测系统的研制具有较强的参考意义。 相似文献
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在中国制造业中,目前许多企业在工艺设计中仍然采用传统的手工方法,这已成为企业引进和采用先进制造方法的瓶颈。为了解决这一问题,开发了一种内燃机零件计算机辅助工艺设计系统。该系统以内燃机活塞为研究对象。根据企业实际情况,采用两种变分和交互的方法来实现工艺设计,并进行了操作,效果显著。 相似文献
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介绍了虚拟技术在内燃机设计、制造、试验、维修等方面的应用情况,提出了加速我国虚拟技术在内燃杌行业中应用的对策. 相似文献
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内燃式水动力系统的满负荷特性 总被引:1,自引:0,他引:1
提出了一种直接利用内燃机活塞的直线往复运动实现水压力能输出的新工作模式。实现了内燃机和柱塞式水泵结构的一体化,研制了内燃式水动力系统试验样机。介绍了其工作原理和结构特点。采用计算机仿真的方法, 得到了满负荷条件下的主要工作性能。结果表明,在满负荷条件下,其有效功率、有效热效率及输出压力比内燃机一柱塞式水泵组合系统大约高13%-15%;燃油消耗率大约低15%左右。通过试验,给出了满负荷条件下燃油消耗率、输出压力、输出流量与曲轴工作转速之间的关系曲线,并与仿真结果进行了比较。给出了满负荷条件下, 内燃式水动力系统转速的最佳工作区间。 相似文献
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通过试验研究了内燃式水动力装置的有效热效率特性。内燃式水动力装置将传统内燃机与柱塞式水泵技术集成为一体,直接利用活塞往复直线运动输出水压能。定义了系统最佳有效热效率区和最佳有效热效率特性曲线并与传统内燃机驱动柱塞泵系统进行了比较。全工况有效热效率比传统内燃机驱动柱塞泵系统改善13.63%~ 74.45%。相同有效热效率水平下包含的工况明显比传统内燃机驱动柱塞泵系统宽广。内燃式水动力装置各油门开度下最高有效热效率在19.91%~28.88%之间,对应转速为1400 r/min。 相似文献
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A new steady flow test bench test facility has been designed and fabricated for exploration of complex three-dimensional flowfields inside a cylinder of an internal combustion engine. An engine cylinder head of a currently produced car engine with four head valves is utilized as an inlet section of the newly built test bench test. No piston is located in the cylinder and the intake valves are not periodically operated. They remain open during the test periods. An extensive set of initial experimental data has been acquired for both open intake valves and for the location of the probes at two different axial stations in the engine cylinder. The experimental technique of thermo-anemometer split-fiber probes is employed in this research work, which is a novelty never applied before to this class of flows. The probe properties are explained in the paper with emphasis on the probe directional characteristics. The verification tests proved the operational readiness of the new test bench to acquire reliable experimental data at a range of flow conditions simulating real engine settings. The acquired data set base will be used for validations of improved CFD engine design codes. An analysis of the initial set of experimental data clearly indicates that two vortices, or more likely down-flowing spiral flow structures. are present side by side in the cylinder. Mutual interaction of these two flow structures and the ability to generate faithful numerical simulation of this flow pattern for additional planes of measurement and various valve openings will be reported separately. 相似文献
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Seyed Saeid Mohtasebi Farzad A. Shirazi Ahmad Javaheri Ghodrat Hamze Nava 《Journal of Mechanical Science and Technology》2010,24(11):2323-2331
Mechanical and thermodynamical performance of internal combustion engines is significantly affected by the engine working
temperature. In an engine test bed, the internal combustion engines are tested in different operating conditions using a dynamometer.
It is required that the engine temperature be controlled precisely, particularly in transient states. This precise control
can be achieved by an engine coolant conditioning system mainly consisting of a heat exchanger, a control valve, and a controller.
In this study, constitutive equations of the system are derived first. These differential equations show the second-order
nonlinear time-varying dynamics of the system. The model is validated with the experimental data providing satisfactory results.
After presenting the dynamic equations of the system, a fuzzy controller is designed based on our prior knowledge of the system.
The fuzzy rules and the membership functions are derived by a trial and error and heuristic method. Because of the nonlinear
nature of the system the fuzzy rules are set to satisfy the requirements of the temperature control for different operating
conditions of the engine. The performance of the fuzzy controller is compared with a PI one for different transient conditions.
The results of the simulation show the better performance of the fuzzy controller. The main advantages of the fuzzy controller
are the shorter settling time, smaller overshoot, and improved performance especially in the transient states of the system. 相似文献
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作为一种十分重要的动力机械,内燃机可以利用燃料燃烧所释放出的热能实施动力转化,从而驱动各种类型的机械设备高效运行。而一旦内燃机在使用期间出现了故障问题,那么就会导致机械设备运行受阻。对此本文针对内燃机机械维修控制工作的重要价值以及常见问题进行分析,并提出科学合理的控制措施,以此来帮助相关领域工作人员更好地开展内燃机机械维修工作,提高整体维修管理水平。 相似文献
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随着社会经济的不断发展,智能化的发展速度令人瞠目结舌。现在越来越多的行业都在与智能化接轨,机器人群控智能制造系统就是智能化发展的典型产物。机器人群控智能制造系统的研发加快了加工制造业、内燃机制造业的发展速度。本文对机器人群控智能制造系统功能设计与应用的发展现状进行了分析,同时对于机器人群控智能制造系统功能在内燃机行业的设计与应用进行了研究,希望对于内燃机行业的发展提供借鉴。 相似文献
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根据目前内燃机发展趋势,确定了内燃机振动在内燃机设计中的重要地位。然后总结出内燃机轴系振动的形式,同时评析了内燃机轴系振动的力学模型、分析计算方法及近年来的最新研究动态。 相似文献