共查询到20条相似文献,搜索用时 62 毫秒
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将FPGA应用于已研制的步进电机单步进给特性测试系统中,实现了以往由单片机完成的信号细分、辨向、计数、串口通讯以及数据读写等功能,进一步提高了测试系统的可靠性和测量精度.对测试系统的结构、工作原理和主要软件模块的设计进行了较为详细的叙述. 相似文献
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研制的步进电机单步进给特性测试系统采用单片机通过光电编码器对转角进行测量,并把测量的数据传送到上位PC机进行数据处理和结果显示,具有较高的性价比。对系统的结构和工作原理,以及主要软件模块的设计进行了较详细的叙述。 相似文献
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步进电机在自动线中的应用 总被引:1,自引:0,他引:1
介绍了步进电机的工作原理和控制方法,结合自动线系统对可编程控制器S7-200的位控向导编程方法进行了阐述.给出了控制系统的硬件、软件设计方法.可以直接应用于步进电机实际控制系统中. 相似文献
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单片机在步进电机控制系统中的应用 总被引:14,自引:0,他引:14
步进电机是一种易于精确控制的电机,由于其良好的性能而受到广泛的应用,其控制方法也多种多样。本文介绍了8051系列单片机对步进电机的控制方法。该系统成本不高,同时还可以很灵活地改变程序来改变控制方案。 相似文献
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为解决制动系统部件测试工艺繁琐、测试设备多的问题,开发了一种柔性闭环控制系统,用于测试制动系统关键部件.构建了柔性闭环系统通用控制平台,提出了电磁阀柔性关闭数学模型,分析了影响试验台精度的因素及提高精度的措施,并采用事件驱动、软件重用和组件连接方式开发了用于测试制动系统部件性能的测控软件.根据制动系统部件输入口、控制方式和技术指标,将该控制平台用于制动系统部件试验台,应用结果验证了该柔性闭环控制系统的可靠性和实用性. 相似文献
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采用PCL-812PG多功能数据采集卡,在Visual C+ +平台上开发出液位/流量数据采集和实时控制系统.介绍了数据采集测试软件和系统实时控制软件的设计与实现.为确保实时性和控制精度,系统使用了多媒体定时器.设计的软件经实验装置检验,可以满足设备实时控制要求. 相似文献
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A software-based measurement system using both analogue data acquisition and digital communication via a general-purpose interface bus (GPIB) board has been developed for analysis and evaluation of disc brake squeal. The system is built around a computer and based on commercial software. Brake pressure and torque, rotational speed, five different temperatures, and sound emission are logged once a second. If the sound is characterised as a squeal it is saved to file together with the other parameters. The measurement system is very flexible, allowing for different types of instruments and sensors to be used by adapting the software. Furthermore, the same software is used for evaluation of the collected data. Mechanically, the equipment consists of a complete front wheel suspension where the original brake disc and caliper are mounted in a steel tube chassis. The brake disc is driven by a DC electric motor, while a hydraulic system provides the brake pressure. Brake pressure and rotational speed can be controlled independently. 相似文献
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针对于整车制动系统踏板感觉的分析与调校问题,当前的模拟分析手段不能精确地模拟制动系统踏板感觉;通过引入多学科领域系统仿真软件SimulationX,应用该软件建立了单个零部件仿真模型,并搭建了整个制动系统仿真模型,进而对制动性能进行了动态仿真;根据仿真模型,调整制动系统零件尺寸参数、特性曲线及特性值等,可模拟出最理想的制动系统踏板感觉性能曲线;为检验模型的准确性,对车辆进行了实际道路测试,并将测试结果与SimulationX模拟结果进行了对比.分析结果表明,基于SimulationX建立的整车制动系统模型仿真结果与实际测试结果基本相符,SimulationX做为一种模拟分析软件,可以较好的满足制动系统踏板感觉调校的需要. 相似文献
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Development of fly ash-based automotive brake lining 总被引:8,自引:0,他引:8
Coal-fired power plants all over the world generate huge amounts of fly ash each year, 70 million tons of which are produced in the United States alone. Only 40% of all fly ashes generated in the USA find beneficial applications and rest have to be disposed off, which is burden for the generation industry. Fly ash particles possess certain characteristics that make them suitable for use in friction composites as a filler material. An attempt has been made through this research to incorporate more than 50 wt% of fly ash particles in automotive brake lining friction composites. This paper presents the research carried out on development of friction composites, using fly ash obtained from a specific power plant in Illinois. Ingredients such as phenolic resin, aramid pulp, glass fiber, potassium titanate, graphite, aluminum fiber and copper powder were used in the composite development phase, in addition to the fly ash. The developed brake lining composites have exhibited consistent coefficients of friction in the range of 0.35–0.4, and wear rates lower than 12 wt%. 相似文献
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针对汽车制动系统制动引起的抖动和噪声进行分析,制动振动和噪声主要是由于制动钳支架固有频率受到外部激励而引起的.对改进后的制动盘机制动蹄片进行道路验证试验并对试验后制动盘的厚度、制动蹄片的厚度及制动盘的跳动量进行测量.试验表明通过提高制动钳支架的刚度可以转移固有频率,改善制动振动和噪声. 相似文献
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