共查询到19条相似文献,搜索用时 156 毫秒
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对电惯量模拟方法进行了深入分析,通过对制动过程中制动力矩的分析,给出了电机在制动器制动时输出的力矩与模拟惯量的关系.采用机械模拟和电模拟相结合的方法设计开发了摩托车制动器试验台,实现制动器台架试验时对当量惯量的模拟.试验表明:采用电惯量模拟后,系统的性能明显优于采用大量飞轮的机械惯量制动器试验台,提高了试验台的自动化程度. 相似文献
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针对传统的制动器试验台试验安装中惯量调整费时、费力且准确度较差的特点,设计开发了一种高精度、免拆卸、可快速任意组合惯量装置,该装置能够为车辆制动器、离合器等研究提供更加接近实际的模拟机械惯量;同时能满足试验台设计范围内的任意惯量要求,大大降低了试验准备时间。 相似文献
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为精确地模拟实际工况中汽车传动系转动惯量,实现对多种汽车传动系冲击耐久性能的检测,基于机电混合惯量模拟方式设计传动系冲击耐久性试验台惯量模拟系统。根据机电混合模拟惯量原理,确定了飞轮组设计原则,建立了动能补偿系统。采用转速控制法实时控制电机输出转矩以补偿飞轮动能,调节系统输出惯量,并对试验台惯量模拟范围进行分析。结果表明,以基础惯量为10的试验台为例,按0.6g减速度设计时,通过调节飞轮组,结合电机控制,可模拟的汽车转动惯量范围为0~195,满足轻型、中型、重型车的惯量要求,且模拟精度高、试验成本低,有较好的工程实用价值。 相似文献
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实验设计一种圆盘式带制动电流变离合器(以下简称为电流变离合器)。介绍其结构特点和工作原理,分析结构参数对机械性能的影响,讨论传递转矩,单位传动惯量传递的转矩和连续调速范围与结构尺寸的关系。 相似文献
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I. A. Khalilov 《Russian Engineering Research》2010,30(3):206-212
The influence of the gap in clutches on the dynamic properties of drives is investigated, by simulation. The maximum impact
torque is determined as a function of the gap, the clutch damping, the frequency and amplitude of the oscillations in the
driving torque, the drag torque of the machine tool, and the ratio of the moments of inertia of the drive components preceding
and following the clutch. 相似文献
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介绍了ZQF-80kW直流电机能量反馈式试验台的设计。与传统试验台相比,该试验台将被试发电机所发直流电能输送给陪试直流电动机,陪试机与拖动电机一起对被试机进行拖动,构成能量反馈。整个试验台采用带通讯的检测数字显示仪表,利用MCGS组态软件设计操作界面,具有人机界面友好且操作简单方便的特点。 相似文献
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销-盘摩擦试验机是摩擦学领域的标准摩擦实验设备,但是面对热成形过程中的摩擦过程,销-盘摩擦试验机中的往复摩擦引起磨屑在轨道内快速堆积,与热成形实际工况并不一致。提出一种新的高温滑移摩擦试验机设计方案,该方案控制模具钢销在板料滑条上单向长距离滑移,用以实现对连续热成形摩擦过程的模拟。通过分析销-盘摩擦试验机和高温滑移摩擦试验机的实验结果,发现后者的实验过程更接近热成形的实际工况,利于展开对摩擦磨损机制的定性定量分析。 相似文献
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Kwangseok Oh Seungjae Yun Kyungeun Ko Panyoung Kim Jaho Seo Kyongsu Yi 《Journal of Mechanical Science and Technology》2016,30(7):2933-2940
This paper describes an investigation of energy efficiency by applying an advanced powertrain system in a conventional wheel loader. A conventional powertrain of a wheel loader consists of an engine, torque converter and transmission. A torque converter in a conventional system generally causes a significant amount of energy loss, as determined by analyzing energy flow based on V-pattern working. To prevent energy loss in a torque converter, Automated manual transmission (AMT) was proposed and modeled in this paper as an advanced powertrain. A wheel loader based on AMT does not need to use a torque converter since the single clutch system is used between the engine and transmission with subsystems of engine controller, clutch actuator and controller. A simplified single clutch system and controller were constructed for V-pattern working of a wheel loader. Additionally, a PI-controller was used as a control algorithm for engine speed control to prevent energy loss while the clutch is not engaged. All simulation models have been constructed in the Matlab/ Simulink environment, and simulation studies were conducted by using a simulation model of a wheel loader with a driver model based on V-pattern working. Simulation results of the AMT-based wheel loader were analyzed by comparison with the results of the torque converter-based wheel loader, and the results show that the AMT-based wheel loader is more energy efficient than the conventional wheel loader. 相似文献
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针对单摩擦元件纯电动两档变速器的动力换档过程,提出基于极小值原理的双控制变量换档协调优化控制策略。在转矩相阶段,对整车进行稳定加速度控制;在惯性相阶段,构造目标泛函兼顾末时刻点的冲击度和过程中的滑摩功,以电动机、摩擦元件转矩变化率为控制变量,并根据过程中的容许冲击度对控制变量施加约束,针对该带约束条件的波尔扎问题,利用极小值原理最优控制算法求解电动机、摩擦元件的最优状态变化轨迹。在Matlab/Simulink软件平台上搭建换档控制仿真模型,验证自由边界条件下的双控制变量优化控制策略的可行性。并将该换档策略应用于所搭建的试验台架上,换档试验结果表明其能有效地提高换档品质,延长摩擦元件的使用寿命。 相似文献