排序方式: 共有48条查询结果,搜索用时 15 毫秒
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目的针对负载特性是以静扭矩为主的阀控马达电液比例伺服系统的位置跟踪控制,研究在变增益、变死区非线性因素影响下的跟踪性能问题.方法在常规复合控制结合死区补偿方法的基础上,设计了死区和自调节前馈补偿的综合控制方法.结果实验结果表明,在负载扭矩大范围内变化下,正弦和等速跟踪均取得了令人满意的跟踪效果.结论死区和自调节前馈补偿的综合控制方法解决了阀控马达电液比例伺服系统由于变增益、变死区引起的位置跟踪精度问题. 相似文献
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The traditional testing method of a hydraulic pump requires a large amount of test data from a variety of pump working conditions. The test is usually time-consuming and energy-consuming. And the accurate characteristic curves of the pump were hardly obtained due to a limited amount and discreteness of the test data.In order to simplify the test procedure and improve the test accuracy,a novel method for measuring hydraulic pump operating characteristic based on multi-element nonlinear regression( NLMR) modeling is proposed in this paper. The main idea of this modeling method is establishing a mathematical model to predict the performance parameters of the hydraulic pump,only a small amount of test data is needed. Consequently,the pump operating characteristics in any working conditions are obtained. And the test results of the pump are easily characterized in the graphs,charts,tables and so on. The evaluations of the model are carried out and discussed in this paper. The result shows that the test error of the novel method can be controlled to be about 0. 1%. Compared with the traditional test method,the proposed method reduces greatly the test time and the random error of the test data,and improves the efficiency and accuracy of the pump test. 相似文献
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针对大型油气悬挂缸的静、动态性能试验,提出了一种由伺服电机驱动的定量液压泵/马达控制加载液压缸的节能型试验台设计方案,试验过程中能量的回收与存储采用超级电容。试验台可对被试悬挂缸施加多种激励,且液压主回路无节流。建立了加载系统的数学模型,并利用AMESim软件仿真了性能试验过程。研究结果表明:试验台的性能可以满足多种大型悬挂缸静、动态性能试验的需要,且能实现能量回收,相对于阀控系统能耗降低了约92%;超级电容储能方案避免了电机瞬时大功率运行对电网的冲击,大幅降低了配电系统的建设、改造成本。 相似文献
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基于MB90F428的汽车仪表设计 总被引:7,自引:1,他引:7
本文对汽车仪表的基本结构和功能进行介绍,简述了CAN总线技术以及在汽车领域的应用,最终选择了Fujitsu公司的MB90F428芯片开发带有CAN通讯的汽车仪表,简要介绍了该芯片的基本结构和主要特点,最后对汽车仪表板的软硬件设计进行阐述。 相似文献
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