共查询到20条相似文献,搜索用时 890 毫秒
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下肢外骨骼机器人动力学分析与设计 总被引:1,自引:0,他引:1
设计了一种针对军事用途的下肢外骨骼机器人,主要为行军过程中的士兵承载负重,分析了人类下肢自由度以及下肢步态的特点,对人体下肢在单足和双足支撑期进行了动力学分析,建立了七杆模型,并与通常的五杆模型进行比较,得到各关节在一个步态周期内驱动力矩以及功率的变化,随后分析了人体下肢在登台阶过程中的功率变化,利用两者的分析结果确定了各关节的驱动方式.结合下肢外骨骼所需要实现的功能、工作原理及其结构组成,利用SolidWorks软件对其进行结构设计.最后,为验证所得到的结果的正确性,将样机模型导入ADAMS中进行验证,证明了所得到的液压缸力和各关节力矩是正确的. 相似文献
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发动机磁流变悬置隔振模糊控制与仿真 总被引:3,自引:0,他引:3
在宽频范围内对发动机振动进行积极隔振研究,对提高运载器性能具有重要意义.在分析发动机隔振动力学模型基础上,提出用可调刚度的磁流变弹性元件和可调阻尼的磁流变阻尼器件构成磁流变悬置,以减小发动机对基座的垂向传递力为目标,设计出用仿人思想修改参数的发动机垂直隔振模糊控制器,在不同激励频率下,对发动机隔振进行了仿真试验.结果表明,相对于被动的橡胶悬王和液压悬王隔振,基于磁流变悬王的发动机模糊控制隔振具有明显的优势,能在宽频范围内把力传递率控制在10%以内,并降低了机体的振动. 相似文献
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《系统工程理论与实践》2014,(5)
正August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists 相似文献
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《系统科学与系统工程学报(英文版)》2014,(2)
正AF:Any Field The School of Economics and Management at Tsinghua University(Tsinghua SEM)invites applications for faculty positions at all levels(Assistant Professor,Associate Professor and Full Professor)in any fields of business administration and management.Tsinghua SEM is the only school 相似文献
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《系统科学与系统工程学报(英文版)》2014,(4)
正June 22-24,2015Guangzhou,China http://iec.cnsba.com/index.htmlCo-Sponsored by:ffiEE SMC(pending)South China University of Technology The Chinese University of Hong Kong Tsinghua UniversityHosted bv:School of Business Administration,South China University of Technology,China Conference Co-Chairs: 相似文献
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The paper is about negotiating with issues that discourage innovation. The subject is environmental deterioration, with concern directed at the impediments that keep it from being innovatively resolved. The paper is organized around three issues. (1) The dominant model of environmental concern, called environmental protection, is managed predominantly via command and control approaches. (2) Command and control, by relying on analytical segmentation to subdivide the problem into digestible bits and using formal legislation to direct it, are not up to emerging challenges in the area. (3) More robust models are available but difficult to experiment with due to impediments that discourage change. These impediments are seen in ideals associated with protection, prevention, recycling, and sustainability that tend to do more to sustain harmful practices than to seek beneficial alternatives. Being able to appreciate the underlying restrictions of entropy could help stimulate a more innovative agenda. These issues are tested via a project funded by the EPA entitled ENERGY STAR Homes. 相似文献