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提高绞车式打包机腿使用寿命之探索
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作者 孙玉锋 《中国棉花加工》 1989年第4期25-26,共2页
机腿是绞车打包机的重要部件。使用一段时间后的机腿有时会突然断裂,致使打包机停车,棉厂停产,造成重大经济损失。因此,分析机腿的断裂原因,找出提高其寿命的办法,有着十分重要的意义。
关键词 绞车式打包 机腿 工作条件 棉花加工 使用寿命 断裂原因
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考虑动载荷的腿背部健身机设计 被引量:1
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作者 张学胜 赵永东 张炳喜 《机械设计与研究》 CSCD 北大核心 2008年第5期95-99,共5页
提出了一套腿背部健身机的设计方案,介绍了它的原理、机械零件以及传动方案的设计,并对健身机的曲柄滑块机构进行了运动学和动力学分析。在考虑动载荷基础上分别对主轴和连杆进行了强度和稳定性校核。结果表明本方案满足强度和稳定性条... 提出了一套腿背部健身机的设计方案,介绍了它的原理、机械零件以及传动方案的设计,并对健身机的曲柄滑块机构进行了运动学和动力学分析。在考虑动载荷基础上分别对主轴和连杆进行了强度和稳定性校核。结果表明本方案满足强度和稳定性条件。最后依据该方案制作了工作样机,经试用发现:本机工作可靠,运行平稳,具有较好的健身效果。 展开更多
关键词 背部健身 动力学分析 达朗伯原理 曲柄滑块
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基于概率与区间的盾构机云腿混合可靠性分析
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作者 熊文文 刘杰 +1 位作者 卿启湘 金秋谈 《计算机仿真》 CSCD 北大核心 2015年第2期241-245,336,共6页
针对大型复杂装备盾构机结构强度可靠性设计问题,选取其关键部件云腿结构作为研究对象。由于结构系统存在失效性,使可靠性受到影响。提出利用区间数学理论、区间退化理论和可靠性设计方法,将盾构机云腿参数的不确定参量的概率密度函数... 针对大型复杂装备盾构机结构强度可靠性设计问题,选取其关键部件云腿结构作为研究对象。由于结构系统存在失效性,使可靠性受到影响。提出利用区间数学理论、区间退化理论和可靠性设计方法,将盾构机云腿参数的不确定参量的概率密度函数相关参数作为区间数。并考虑到云腿最易失效模式为强度失效,而强度表达式为高非线性,很难求解。利用一次二阶矩方法得出盾构机云腿强度的概率分布带区间的可靠性设计模型,提出了一种新的盾构机云腿可靠性设计思路。讨论了参数区间不确定水平对盾构机云腿可靠性的影响。结果表明,改进方法适合工程应用,对原始数据要求较低,为缺少试验数据的盾构机云腿结构可靠性分析提供了一种有效分析方法。 展开更多
关键词 盾构 概率分布 区间数学 区间退化 可靠性分析
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“魔鬼”女人,与健身机器为伍
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作者 阿丫 赵成林 《半岛新生活》 2004年第6期47-47,共1页
关键词 健身器械 女性 肱三头肌训练器 扭腰器
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Wheeled foot quadruped robot HITAN-I 被引量:2
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作者 王鹏飞 Sun Lining 《High Technology Letters》 EI CAS 2006年第4期346-350,共5页
In view of the robot running environment, the structure of wheeled foot and quadruped are adopted in this robot system, which combines the priorities of both wheeled robot and legged robot. Based on CAN bus, the two-c... In view of the robot running environment, the structure of wheeled foot and quadruped are adopted in this robot system, which combines the priorities of both wheeled robot and legged robot. Based on CAN bus, the two-class robot control system using multiple controllers and drivers is constructed. At the same time, serial inverse kinematics of swaying leg and parallel inverse kinematics of supporting legs are analyzed independently. The forward gait and turning gait are planned and experiment image is given at last. 展开更多
关键词 wheeled foot ROBOT control system gait planning
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Motion design of a hybrid wheeled/legged robot for lunar exploration
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作者 陈学东 田文罡 +1 位作者 李小清 渡边桂吾 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2003年第3期246-249,共4页
The robot consists of a quadruped mechanism and two active dual-wheel casters possesses the advantages of wheeled and legged mechanism, and can quickly move on the relatively plane ground with the wheeled mechanism, a... The robot consists of a quadruped mechanism and two active dual-wheel casters possesses the advantages of wheeled and legged mechanism, and can quickly move on the relatively plane ground with the wheeled mechanism, and can walk on the extremely uneven terrain with the legged mechanism. The effectiveness of the motion design of the hybrid robot is iHustrated by simulation results. 展开更多
关键词 Lunar exploration robot Quadruped mechanism Mobile mechanism Hybrid wheeled/legged
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PRINCIPLE, CONSTRUCTION AND KINEMATIC ANALYSIS FOR THE OMNIDIRECTIONAL MOBILE ROBOT——ICE-SKATER ROBOT 被引量:2
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作者 宋立博 吕恬生 +1 位作者 费燕琼 袁池 《Journal of Shanghai Jiaotong university(Science)》 EI 2002年第2期130-136,共7页
Three main basic types of locomotion for a mobile robot were introduced and the advantages and disadvantages of a legged mobile robot, a wheeled mobile robot and an articulated mobile robot were also discussed. A new ... Three main basic types of locomotion for a mobile robot were introduced and the advantages and disadvantages of a legged mobile robot, a wheeled mobile robot and an articulated mobile robot were also discussed. A new type of leg wheeled mobile robot was introduced which combines the adaptability of legged robot with the stability of wheeled robot. On the basis of the structure of the wheels, the paper described the principle of the ice skater robot developed from Roller walker and ALDURO and its construction. The paper also established an inertia coordinate system and a wheel coordinate system, and analyzed the configuration or the posture and the related kinematic constraints of the robot according to some assumptions. Based on the motion principle, a logic based coordinated control system and corresponded flowchart were designed. At last, taking the ice skater robot as an example the paper expounded its application and the actual experiment proved its feasibility. 展开更多
关键词 leg-wheeled mobile robot ice-skater robot kinematic analysis centeredorientable wheel logic-based coordinated control
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Aerodynamic Effects on TLP Type Wind Turbines and Predictions of the Electricity They Generate
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作者 Yasunori Nihei Hiroyuki Fujioka 《Journal of Marine Science and Application》 2011年第2期139-149,共11页
This research proposes a new offshore wind energy generation system that uses a tension leg platform (TLP) and describes experiments performed on a TLP type wind turbine in both waves and wind. The following conclusio... This research proposes a new offshore wind energy generation system that uses a tension leg platform (TLP) and describes experiments performed on a TLP type wind turbine in both waves and wind. The following conclusions can be made from the results of this research. 1) In the case of coexisting wave-wind fields, the wind effect stabilizes the pitch motion. 2) The wind effect decreases vibration of the mooring lines when waves and wind coexist. In particular, the springing (2nd or 3rd order force) also decreases in this field. 3) It can be estimated that the reduction in the rate of generation of electrical power can be up to about 6% as a result of the heel angle. In addition, the annual amount of electricity generated was estimated along with the utilization factor based on the experimental results. 展开更多
关键词 tension leg platform (TLP) offshore wind turbine tank test in coexisting wave-wind condition annual amount of electricity generated
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Bionic jumping dynamics of the musculoskeletal leg mechanism for quadruped robots
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作者 雷静桃 Wu Jiandong 《High Technology Letters》 EI CAS 2016年第2期120-127,共8页
As the pneumatic artificial muscle (PAM) has flexibility properties similar to biological muscle which is widely used in robotics as one kind of actuators, the bionic mechanism driven by PAMs be- comes a hot spot in... As the pneumatic artificial muscle (PAM) has flexibility properties similar to biological muscle which is widely used in robotics as one kind of actuators, the bionic mechanism driven by PAMs be- comes a hot spot in robotics. In this paper, a kind of musculoskeletal leg mechanism driven by PAMs is presented, which has three joints driven by four PAMs. The jumping movement is divided into three phases. The forward and inverse kinematics of the leg mechanism in different jumping phases is derived. Considering the ground reaction force between feet and environment, the dynamic in different jumping phases is analyzed by Lagrange method, then the relationship between PAM driving force and the joints angular displacement, angular velocity, angular acceleration during one jumping cycle is obtained, which will lay a foundatiori for the jumping experiment of the musculo- skeletal lez mechanism. 展开更多
关键词 MUSCULOSKELETAL pneumatic artificial muscle (PAM) JUMPING BIOMECHANICS DYNAMICS
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