共查询到20条相似文献,搜索用时 125 毫秒
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气缸位移自学习控制研究 总被引:6,自引:0,他引:6
所研制的气缸位移计算机控制系统,采用变速度,变加速度生成位称指令,使目标点处的速度接近为零,从而减小了目标点处惯性对位移精度的影响,减少了学习次数;并采用微量调节的方法进一步提高气缸位移业 相似文献
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气缸低摩擦力测量方法的研究 总被引:1,自引:0,他引:1
为了测量新型金属密封气缸的低摩擦力,设计了间测法和直测法两种测量系统。比较实验表明,直测法测量精度高、数据一致性好、动摩擦力测量时可预设速度值,因此更适合于气缸低摩擦力的测量。在此基础上,采用直测法获得了新型金属密封气缸静摩擦力和不同速度下的气缸动摩擦力,为该型气缸的使用提供了基础数据。 相似文献
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介绍了一种8031单片机控制的实用型智能化的气缸速度检测系统,系统采用霍尔元件及相应的信号放大比较电路作速度传感器,给出了气缸速度的检测原理及检测系统的软硬件组成。实现了气缸绝对速度的自动在线检测,并可对异常速度进行实时调节或报警,保证了自动化机械的运行精度。 相似文献
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直筒式汽车燃油传感器的应用与研究 总被引:1,自引:0,他引:1
由于东风汽车股份有限公司某车型的燃油箱采用的是整体吹塑成型的大容积塑料油箱,其内部无法设计用来缓冲燃油波动的挡板。因此,开发一款新型的直筒式燃油传感器,用以解决车辆在行驶速度急剧变化时出现的燃油表指针晃动和持续变化的问题。该直筒式燃油传感器可以推广到其他车型。 相似文献
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某发动机试验后发现发动机缸孔内表面上出现白色异常痕迹。痕迹出现的区域为第三道活塞环运动的区域,与拉缸现象十分相似。通过对试验信息分析、异常件的检测分析及试验验证确认了白色异常痕迹对发动机无危害性,其产生原因是由于发动机磨合初期,高速运转时缸孔局部润滑油膜破损,从而导致缸孔材质发生化学反应,产生白色痕迹。发动机充分磨合后,该白色痕迹随着发动机的运转而逐步消失。通过减小活塞环弹力能有效的解决该问题。 相似文献
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Cylinder pressure reconstruction based on complex radial basis function networks from vibration and speed signals 总被引:3,自引:0,他引:3
Methods to measure and monitor the cylinder pressure in internal combustion engines can contribute to reduced fuel consumption, noise and exhaust emissions. As direct measurements of the cylinder pressure are expensive and not suitable for measurements in vehicles on the road indirect methods which measure cylinder pressure have great potential value. In this paper, a non-linear model based on complex radial basis function (RBF) networks is proposed for the reconstruction of in-cylinder pressure pulse waveforms. Input to the network is the Fourier transforms of both engine structure vibration and crankshaft speed fluctuation. The primary reason for the use of Fourier transforms is that different frequency regions of the signals are used for the reconstruction process. This approach also makes it easier to reduce the amount of information that is used as input to the RBF network. The complex RBF network was applied to measurements from a 6-cylinder ethanol powered diesel engine over a wide range of running conditions. Prediction accuracy was validated by comparing a number of parameters between the measured and predicted cylinder pressure waveform such as maximum pressure, maximum rate of pressure rise and indicated mean effective pressure. The performance of the network was also evaluated for a number of untrained running conditions that differ both in speed and load from the trained ones. The results for the validation set were comparable to the trained conditions. 相似文献
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激光淬火提高发动机汽缸抗磨性能的研究 总被引:1,自引:3,他引:1
激光淬火对于提高发动机汽缺抗磨砺性能是个有效的方法。CO2激光适合于汽缸缸套(对称形体)淬火,YAG激光适合于形状复杂缸体液火。文中介绍了有关的激光淬火工艺,推荐了最佳的淬火深度和最佳的淬火面积。 相似文献