Results 51 to 60 of about 921 (128)
Research on dynamic features of hydraulic system for fully mechanized mining support and its improvement design [PDF]
In the hydraulic support work of fully mechanized working face, there are often problems such as insufficient initial support force and slow moving speed of the support.
GUO Xinwei
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Multi-objective optimization and simulation on 8-rod-mechanism working device of loaders [PDF]
, 2009 提出了一种实用性和可操作性较强的八杆机构多目标优化方法.将设计变量矩阵分解为两组耦合度较小的矩阵,提取重要度最高的几个优化目标,把其他优化目标转换成约束条件,建立起八杆机构多目标优化数学模型,同时创建了工作装置多目标优化流程.将该数学模型加载于系统动力学分析软件AdAMS,借助该软件的内建函数,把多目标优化转换成单目标优化,实现了优化过程的函数驱动与函数监测.最终实现了工作装置的快速优化与仿真.In this study,a multi-objective optimization method ...
侯亮 +4 more
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Application of PLC in Hydraulic Power Sliding Table Control System [PDF]
, 2007 阐述了液压动力滑台的工作原理及可编程序控制器(PLC)在控制系统中的应用、PLC控制的硬件结构和程序设计。The application of PLC in the hydraulic power sliding table control system was introduced and its principles, the hardware structure and the procedure design were ...
游龙翔, 魏建忠
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Optimization of EHA sliding mode controller based on spider wasp algorithm [PDF]
ObjectiveThis paper proposes using the Spider Wasp Optimization (SWO) algorithm to achieve precise position control of an electro-hydrostatic actuator (EHA) while reducing the parameter tuning difficulty of the EHA sliding mode controller and improving ...
Chenghu XU +4 more
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Aluminum Alloy Vacuum Die-casting Assistant System Development [PDF]
, 2009 随着汽车轻量化对铝合金压铸件的需求增加及质量要求的提高，对真空压铸技术的推广应用越来越迫切。真空压铸辅助系统是真空压铸技术应用的关键设备，直接影响真空压铸生产效率及真空压铸件质量。目前市场上主要由Fondarex，东芝，宇部等公司产品占据市场，但设备购置投入大，维护成本高。国内主要有松庆自动化，震界自动化等公司，但尚都处于开发完善阶段，设备工作过程和压铸件质量不稳定。 本课题在现有真空压铸技术研究的基础上，结合实际生产需要，研制具有自主知识产权的真空压铸辅助系统。通过真空压铸排气理论模型计算分析，选用 ...
刘亚丹
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Research progress on different pickling techniques and their equipment applications [PDF]
The traditional pickling method for meat has a slow pickling speed and uneven pickling solution, which can easily lead to unstable taste and color of the meat.
CHEN Shuai +4 more
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The application and research of the aircraft flexible fixture [PDF]
, 2010 主要研究气动、液压与电传技术在航空制造业中装配工艺中的应用。对研制出数控机床气动柔性夹紧系统,及其在飞机上零件加工上的应用进行了详细论述,包括柔性系统的机构组成、工作原理及PlC控制系统。该技术的突破为我国飞机数字化加工装配提供了参考价值,并将促进航空制造业的跨越式发展。The application of the pneumatic,hydraulic and power transmission for assembly process and equipment in aviation ...
万世明 +9 more
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Research on adaptive control of self-moving temporary support based on fuzzy PID [PDF]
To address the issue of poor adaptability of self-moving temporary supports and roofs during roadway excavation, an adaptive control method of self-moving temporary support based on fuzzy PID was proposed.
HUANG Yubo +6 more
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Improve Efficiency of Motor Measures [PDF]
, 2013 在能源日趋紧张的情况下,如何提高效率,节约能源逐渐成了社会普遍关心的问题。根据电动机的结构特点、电磁优化和工艺等方面,分析了如何提高电动机工作效率,从而达到节省能源的目的。In an increasingly tense energy,How to improve the efficiency,save energy gradually became a universal concern.In this paper,according to the structure characteristics ...
李红, 王春梅
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, 2014 基于4-SPS/S三自由度冗余驱动并联机构的位置逆解模型,运用微分法推导出了该并联机构的雅可比矩阵,结合Gosselin奇异性分析法和数值分析法,分析了该并联机构的奇异性。随后分析了影响4-SPS/S三自由度冗余驱动并联机构工作空间的主要因素,并对其各支链的行程限制、各球铰副的转角限制和各支链间的尺寸干涉限制等影响因素进行了解析化分析。最后,基于4-SPS/S三自由度冗余驱动并联机构的位置正解模型,设计了该并联机构回转工作空间的求解算法。该算法避免了数值方法及几何方法的复杂性和不确定性 ...
周结华, 彭侠夫
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