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利用选换挡执行机构在变速箱专用台架上进行的耐久试验及位置传感器、电流传感器、上位机程序采集,对选换挡执行机构换挡位置数据进行了分析,并对换挡位置随耐久次数变化而如何改变进行了初探。 相似文献
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为揭示换挡机械手连杆弹性变形对换挡位移和速度的影响,本文中进行了驾驶机器人换挡机械手刚柔耦合运动分析。首先在分析换挡机械手运动原理的基础上,建立了换挡机械手运动学模型,推导了换挡机械手运动学方程,通过运动学方程求逆得到了选挡和挂挡电机轴的位移。然后分别建立了换挡机械手的多刚体模型和刚柔耦合模型,并将选挡和挂挡电机轴的位移作为输入,进行换挡机械手两种模型运动学对比仿真,以分析换挡机械手运动轨迹和换挡误差。最后进行整车换挡位移和速度的仿真和试验,结果两者的趋势基本一致。 相似文献
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法士特16挡自动机械变速器(ATM),是在法士特16挡机械变速器和普通离合器的基础上改变手动换挡操纵的部分,通过微控制器来智能选挡,电气控制单元控制选挡、换挡和离合器的操纵,来实现选挡换挡自动化的。 相似文献
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桑塔纳轿车变速器换挡机构分析改进 总被引:2,自引:0,他引:2
研究了桑塔纳轿车5挡手动变速器换挡机构结构,通过对换挡机构相关零件的力学分析和模拟整车状态下的换挡力测试,验证了在静态换档阶段同步器弹簧的弹力和定排销的定排力对整个换挡力有直接影响,从而提出了变速器两种结构改进方案.对改进后变速器进行的台架测试结果表明,1/2挡、5挡通过定排销结构改进后,变速器选换挡轴处的换挡力下降20N左右;3/4挡通过定排销结构、同步器弹簧改进后,变速器选换挡轴处的换挡力下降40N左右. 相似文献
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S. J. Kim C. Song K. -S. Kim Y. -S. Yoon 《International Journal of Automotive Technology》2014,15(1):125-134
Conventional geared transmissions use some kinds of clutches to control the power flow from an internal combustion engine to the driveline while shifting gears. However, the shifting performance is seriously affected by the clutch engagement and an unavoidable drop in the torque may occur when the clutch is disconnected. Moreover, wear of the clutch, the need for hydraulic equipment, and the load limit may together aggravate the limits of the clutch system. For this reason, as a novel transmission without a clutch, the clutchless geared smart transmission (henceforth CGST) is proposed by our research team. The CGST controls the power flow in a multiple-input gear-train by controlling the electric motor attached to the planetary gear system. However, no CGST has been realized in an actual vehicle thus far, and the performance has been predicted only theoretically. In this research, we analyzed the achievable performance based on a developed CGST dynamic model with a typical CGST structure. In addition, a CGST gear-shifting algorithm is proposed for use with the dynamic model. From the simulation results, the CGST does not show an abrupt drop in its torque or oscillation while shifting gears due to the absence of a discontinuous power flow. The developed dynamic model can serve as a performance reference for the CGST. Moreover, it can be used as a simulation tool for developing a gear-shifting control logic scheme. 相似文献
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电子换挡系统 (Electronic Transmission Range Select System,ETRS) 的控制精度受自动变速器、换挡执行机构的零件自身误差及装配误差的影响,驻车挡、倒车挡、空挡、前进挡各挡位的理论位置与实际装配结果不可能完全匹配,这不仅会影响电子换挡系统的控制精度,而且长期使用后可能存在换挡功能失效的潜在风险。针对上述问题,研究设计了电子换挡系统相关硬件架构、挡位位置识别方法及关键自学习控制算法。控制算法集成直流电机匀速控制、H桥驱动电流数据读取、槽底挡位位置识别、多轮次槽底扫描迭代及挡位位置校验。仿真及实车试验表明,设计的挡位位置识别方法能够实现误差不大于0.15°,自学习控制算法能够实现实车试验大数据下均值与理论角度位置差距不大于0.3°,同时保证100%成功率,满足电控换挡系统长期工作的准确性及耐久性要求。
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This paper is a continuation of a previous paper titled ??Modeling and Model Predictive Control for Hybrid Vehicle?? published on IJAT/2011 describing a mathematical model and design for a model predictive controller for tracking speeds and simulations. The present paper further describes a fuzzy logic controller for the smooth and quick engagement of an automatic clutch. The described controller uses both fuzzy logic and slip control algorithms to enable automatic clutch engagement. Clutch engagement and comprehensive simulations for the hybrid vehicle are conducted in MATLAB R2009s. The research described herein offers theoretical solutions for how to better control clutch slip and engagement within realistic parameters used for hybrid vehicles. Algorithms and operations of this fuzzy logic controller can be implemented in electronic control units for automatic clutch engagements and gear-shifting processes. 相似文献
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由德国采埃孚公司制造的ZF12AS2301BO新型变速器,是安装在豪华客车上的一种大转矩变速器。它是在手动机械变速器基础上新发展的AMT,有12个前进挡,速比范围为12.33~0.78,倒挡的传动比也可达11.41,能完全满足大客车频繁起步和加速的操作,提高车辆的整体运行速度,有利于发动机功率的充分利用。变速器采用电控气动控制自动换挡形式,ECU通过对发动机节气门、液压离合器的操作,实现对车辆起步、选挡、换挡的自动控制,变速器的ECU安装在变速器外壳的后方。 相似文献
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This paper establishes the simulation model of a city bus on the basis of the EQ6110 bus prototype and its experimental data.
According to the actual urban driving cycle, the fuel economy and the traction performance of the EQ6110 city bus have been
simulated, and factors such as the driving cycle, the loss of power to engine accessories, the gear-shifting strategy, the
fuel shut-off strategy of the engine, etc., which influence on the bus’s fuel economy, are also quantitatively analyzed. Some
conclusions are drawn as follows: (1) driving cycles have a great influence on the fuel economy of a city bus; (2) under the
typical urban driving cycle of the public bus in China, the engine fuel shut-off strategy can save about 1 to 1.5 percent
of the fuel consumption; and (3) the optimized gear-shifting rules can save 6.7 percent of the fuel consumption. Experimental
results verify that the fuel economy for the EQ6110 public bus is improved by 7.2 pecent over the actual Wuhan urban driving
cycle of the current public bus in China. 相似文献
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针对工业生产过程中的多变量耦合系统难以实现解耦的问题,建立了一种改进的规划算法的RBF神经网络逆系统,构造了多变量神经网络控制器,用来对多变量耦合系统进行解耦控制。对一组给定的二变量耦合系统进行了仿真,结果表明:基于改进的进化规划算法的RBF神经网络逆系统的解耦控制不仅超调量小、响应速度快、控制精度高,而且具有很强的鲁棒性和自适应能力。该解耦控制使得解耦后的多变量系统具备良好的动、静态特性,达到了理想的控制效果。 相似文献