Modeling and control of an airbrake electro‐hydraulic smart actuator

In this paper, an accurate model of an airbrake electro‐hydraulic smart actuator is obtained by physical considerations, and then different control strategies (variable‐gain proportional control, PT₁ control with switching integrator, and second order sub‐optimal sliding mode control) are proposed and analyzed. This application is innovative in the avionic field, and is one of the first attempts to realize a fly‐by‐wire system for airbrakes, oriented to its immediate employment and installation on current aircraft. The project was carried on with the participation of the Italian Ministry of Defense, and was commissioned to MAG, a leading provider of integrated systems and aviation services for aerospace. Copyright © 2011 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society     

经济型铝挤压机研发

阐述了"一带一路"背景下,以生产建筑铝型材为主的经济型铝挤压机研发与制造优势。设计过程采用标准化和模块化,应用多种商业化计算机辅助软件,缩短了研发周期,降低了研发成本和风险;制造过程严格按照设计图纸、施工规范和相关标准执行,采用专用高效设备,使铝挤压机具备最佳功能和效益。通过分析铝挤压机各功能组成,确定铝挤压机的经济性主要体现为投资成本低,功能实用,运行高效和可靠性高。     

基于PLC的车床液压回路控制系统设计

本文介绍了一种车床的典型液压控制回路,给出了液压控制回路图及其工作原理,然后用PLC进行液压控制系统设计,提供了硬件及软件设计方案。     

Flexible sodium‐ion supercapacitor based on polypyrrole/carbon electrode by use of harmless aqueous electrolyte for wearable devices

With the emergence of various wearable devices, supercapacitors have gained immense attention because of their fast response rates. However, most supercapacitors use hazardous electrolyte materials, such as H₂SO₄, KOH, and acetonitrile. Leakage of these types of electrolytes during use would be very harmful to human skin. Therefore, a supercapacitor that does not employ hazardous materials is an attractive option for use in the energy‐storage components of wearable devices. Herein, we successfully demonstrate a Na‐ion supercapacitor (NISC) with a polypyrrole/carbon‐coated heat‐treated carbon felt electrode and an aqueous 0.4 M NaCl electrolyte, which is not harmful. Furthermore, our NISC with polypyrrole/carbon‐coated heat‐treated carbon felt exhibits a high specific capacitance (31.09 F g^?1) and a fast response rate (chargeable at 0.5‐s intervals). The proposed NISC with no harmful materials in the electrolyte has an excellent response rate. It will establish useful guidelines for the energy‐storage components in wearable devices Copyright © 2017 John Wiley & Sons, Ltd.     

基于AMESIM泵控液压机性能优化研究

以AMESIM软件为工具,对泵控液压机系统的位移控制性能进行优化,为进一步的系统优化工作奠定了重要基础。     

Ф200mm松棒矫直机的设计开发

针对在某无缝钢管厂钢管生产线中抱棒管脱离问题的解决,设计开发了Ф200mm松棒矫直机,着重介绍了其主要技术参数、结构特点和设备结构等。     

H13模具钢的锻造及热处理简

简要介绍了H13模具钢的性能特点及应用概况，重点讨论了它的锻造要点和热处理工艺特点，分析了H13热锻模寿命不长、频繁失效的原因，并提出了纠正和预防措施。     

基于BP-GA的大锻件过渡区宏观成形性能优化

针对铝合金大型锻件局部加载成形工艺下过渡区筋部充填不满的问题,借助于BP神经网络和GA遗传算法与数值模拟技术相结合的策略对锻件的局部加载成形工艺参数进行了研究。以锻件过渡区填充性作为质量评价目标,建立了坯料温度、压力机加载速度、第1道次压下量、进给量与质量指标之间的关系模型,利用遗传算法求解得到了合理的工艺参数:坯料温度为435℃,压力机加载速度为5 mm·s-1,第1道次压下量为18 mm,进给量为1165 mm,并将得到的工艺参数进行再模拟,并应用于生产试制,生产后的锻件筋部过渡区充填完整,对比模拟结果,表明所提出的策略能有效对大型锻件局部加载成形过渡区充填问题进行控制。     

某食品加工企业腌泡池智能清洗车设计的方案探讨

针对某食品加工企业上百个大型腌泡池的经常性清洗任务需求,基于现代机电控制技术,提出智能清洗车的解决方案,重点探讨这种清洗车的型式及结构、液压系统与电气控制部分的设计.     

论加强水工工程建筑质量策略

目前,我国的水利事业呈现出稳定健康的发展态势。因此,为了提高水工建设工程的社会效益和经济效益,必须重视水工建设的施工质量。本文通过分析水工工程中常见的质量问题、主要成因,提出了相应的施工和管理措施,以供同行借鉴。