共查询到20条相似文献,搜索用时 156 毫秒
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提出了一种包括摩擦学行为和系统动力学耦合仿真虚拟样机实现方法。该方法使用机械系统动态仿真程序ADAMS作为基本平台进行机构动力学仿真计算,并使用Fortran编程后得到的Matlab文件对机构进行控制,共同作用对机构进行联合仿真。由于系统动力学与油膜动力耦合作用使零部件的动力学特性发生了较大变化,因此在内燃机零部件设计时,考虑摩擦学与系统动力学的耦合是非常必要的。 相似文献
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基于模糊关系矩阵推理的发动机故障诊断专家系统 总被引:6,自引:0,他引:6
描述了一个在WINDOWS环境下开发的故障诊断专家系统的设计与实现,并介绍了有关模糊知识表示与推理的研究工作,详细介绍了该系统结构,知识表示与获取,推理机制的设计实现方法。 相似文献
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电网水电智能调度系统的研究与设计 总被引:1,自引:0,他引:1
基于历史调度信息将人工智能应用于电网水库群调度管理与决策中,采用知识工程的理论与方法建立了调度规则与智能模型相结合的知识表示体系,并对水库调度知识的获取、表示及推理机制进行了设计. 相似文献
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缸套-活塞环材料摩擦系数的试验研究 总被引:4,自引:0,他引:4
为了研究机车柴油机缸套活塞环材料的摩擦学性能,我们设计并制造了一台往复式摩擦磨损试验机。该试验机可在一定范围内实行负荷、速度,机油量的单因素控制,并可同时定性和定量地显示运动中的摩擦力大小.我们利用该试验机对美国GE公司采用的软氮化铸铁缸套-表面镀铬铸铁活塞环材料进行了摩擦学性能的试验研究,得出了该配对副在往复滑动中摩擦系数随负荷和速度变化的关系曲线. 相似文献
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针对水电机组的特点,完善了FMECA模型分析方法,集成规则、框架、模型和过程等多种单一知识表示方法,提出了基于故障树的面向对象的混合知识表示方法,并给出水电机组描述实例。该方法符合领域专家的思维模式,融合了多种传统知识表示方法的长处,适合水电机组专家经验和知识的表示。 相似文献
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以汽轮机叶片设计优化为对象,研究叶片设计优化中智能主模型技术及其内涵,采用参数化形状控制模型、设计知识描述模型、型线数据库、仿真分析模型以及特征/几何混合模型等表示叶片智能主模型,并基于叶片智能主模型,提出了叶片综合设计优化技术的实现途径. 相似文献
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介绍了应用摩擦学故障诊断技术,对机车柴油机润滑系统的磨损颗粒和润滑介质分别作了光谱分析和理化性能测试。通过综合研究,能诊断出柴油机曲轴箱窜燃气的故障状态,并可确定其故障发生部位,旨地提高机车柴油机的可靠性。 相似文献
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内燃机冷却风扇温度控制液压驱动系统技术研究 总被引:18,自引:0,他引:18
对内燃机冷却风扇温度控制液压驱动系统方案进行了探讨 ,对选定的比例阀无级测控系统的液压驱动子系统、温度测控子系统设计中的有关问题进行了研究 ,通过就 WD6 15 .6 7柴油机研制的样机系统相应的试验 ,说明内燃机冷却风扇温度控制液压驱动系统原理的正确性、可行性与先进性 ,装载这种系统的内燃机可明显地提高动力性、改善经济性并降低内燃机噪音。 相似文献
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An experimental study has been carried to use raw Algae oil and its methyl esters in an indirect injection diesel engine. Effects of engine speed, engine load output, injection timing of the algae biofuel and engine compression ratio on the engine output torque, combustion noise (maximum pressure rise rate), maximum pressure and maximum heat release rate have been studied. Raw oil extracted from microalgae and two versions of its methyl ester (0.1 and 0.2 methyl ester versions) have been evaluated in a Ricardo E6 engine. It has been shown that the algae oil methyl ester’s properties are similar to diesel fuel and its use has been successful in running the diesel engine smoothly. However, its use reduced the engine output torque slightly and increased the combustion noise. The engine output can be increased and the combustion noise can be reduced by controlling the engine design parameters e.g. injection timing and compression ratio. 相似文献
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在研究开发摩托车发动机电喷系统过程中,初步完成电喷系统设计后,需要进行台架实验,对摩托车发动机的运行工况进行控制并测试其各项运行参数。笔者设计了摩托车电喷系统,并将测控系统融于其中,方便了摩托车发动机台架实验,可以缩短开发周期和节约成本,系统运行良好和操作方便。 相似文献
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The major advantages of homogeneous charge compression ignition (HCCI) are high efficiency in combination with low NO x -emissions. However, one of the major challenges with HCCI is the control of higher peak pressures which may damage the engine, limiting the HCCI engine life period. In this paper, an attempt is made to analyze computationally the effect of induction swirl in controlling the peak pressures of an HCCI engine under various operating parameters. A single cylinder 1.6 L reentrant piston bowl diesel engine is chosen. For computational analysis, the ECFM-3Z model of STAR–CD is considered because it is suitable for analyzing the combustion processes in SI and CI engines. As an HCCI engine is a hybrid version of SI and CI engines, the ECFM- 3Z model with necessary modifications is used to analyze the peak pressures inside the combustion chamber. The ECFM-3Z model for HCCI mode of combustion is validated with the existing literature to make sure that the results obtained are accurate. Numerical experiments are performed to study the effect of varying properties like speed of the engine, piston bowl geometry, exhaust gas recirculation (EGR) and equivalence ratio under different swirl ratios in controlling the peak pressures inside the combustion chamber. The results show that the swirl ratio has a considerable impact on controlling the peak pressures of HCCI engine. A reduction in peak pressures are observed with a swirl ratio of 4 because of reduced in cylinder temperatures. The combined effect of four operating parameters, i.e., the speed of the engine, piston bowl geometry, EGR, and equivalence ratio with swirl ratios suggest that lower intake temperatures, reentrant piston bowl, higher engine speeds and higher swirl ratios are favorable in controlling the peak pressures. 相似文献