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郭奎黄海波王琦 《机电产品开发与创新》2021,34(6):19-21
本文通过对海上航行状态下横向补给软管的张力计算、结构形式研究、橡胶软管的强度校核等方面,结合海上补给的现状,设计了一种适合横向液货补给的张力软管,可解决两船航行期间在无高架索状态下的横向液货补给。 相似文献
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海上舰船的干货航行补给系统在海上战斗中是至关重要的。在补给过程中,海洋中的风浪等环境,还有补给装置都对船舶的航行存在很大的影响,要保证补给船与接收船能够保持同步同距航行,是海上干货补给系统急需解决的重要问题。本文以海上干货航行补给系统为背景,对补给船在航行补给系统中,船位控制进行了深入研究。 相似文献
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本文以水下机器人在海上石油工程中的应用作为主要研究课题,首先简要概述了水下机器人的相关概念,而后详细探讨了水下机器人在海上石油工程中的应用现状,主要从水下机器人在导管架安装及设施检修中的应用、在海底管线铺设项目中的应用、在海上安全救助方面的应用以及在安全检测和海生物清理作业中的应用这几个方面着手,使水下机器人更好的应用于海上石油工程。 相似文献
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从应用液环泵的角度,在提高真空泵的性能方面进行了一些总结,如大气喷射器、真空调节阀以及补给液系统的改变来提高真空泵的性能。 相似文献
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针对目前国内外移动关节在多自由度机器人上研究和应用较少的现状,本文设计了一款具有移动关节的六自由度机器人并将其应用于工业搬运作业.利用MD-H法建立该机器人的运动学模型,并推导出它的正逆运动学公式.在MATLAB软件的Robotics Toolbox平台下建立该机器人的仿真模型对正逆运动学公式进行验证并运用蒙特卡洛法生成它的工作空间点云图.仿真结果表明,该机器人的工作空间变化平缓且无明显空腔,从而说明机器人结构设计的合理性.最后对其轨迹进行分析并生成各关节变量和笛卡尔坐标分量随时间的变化曲线. 相似文献
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虚设机构法正确性的论证 总被引:2,自引:0,他引:2
并联机器人多回路非对称机构应用非常广泛 ,对其作运动分析一直采用应用很好的虚设机构法去建立其影响系数矩阵。但虚设机构法的科学性并没有进行严格的论证。为了提供更广泛的应用基础 ,在这里对其合理性 ,正确性进行了讨论 ,给出了理论上的证明。 相似文献
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沿途补货的多车场开放式车辆路径问题及蚁群算法 总被引:1,自引:0,他引:1
针对大区域多仓库多需求点的物流配送系统,建立了基于沿途多点补货策略的开放式车辆路径问题模型,强化了区域之间物流资源的整合和配送路径的跨区域优化。根据该模型需货车沿途多次访问仓库补货的特点,提出了带补货控制因子的蚁群算法。利用补货控制因子对仓库和需求点的区别赋权,控制了货车对仓库的访问时机和次数,从而解决了多仓库且车辆装载能力有限的开放式配送网络中货车沿途补货的问题。仿真试验表明了该算法的有效性和稳定性。 相似文献
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分析了船舶主机企业刀工具库存管理的特点,提出了采用自适应系数的二次指数平均法及标准正态分布函数建立的企业刀工具库存补充模型,并通过具体的实例分析了其有效性. 相似文献
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为比较基于时间的供应商管理库存整合补货模式和传统补货模式对零售业供应链中牛鞭效应的影响,概述了供应商管理库存在零售业供应链中的应用情况,构建了两种补货模式的系统动力学模型。通过仿真,定量地比较了两种补货模式中供应商和零售商对泊松流随机需求输入的订单响应率的波动。另外,为了比较基于时间的供应商管理库存整合补货模式下补货周期对牛鞭效应的影响,通过改变参数设置模拟了不同补货周期下供应商和零售商的订单响应率波动。结果显示,与传统模式相比,基于时间的供应商管理库存整合补货对牛鞭效应有明显的改善;供应商管理库存整合补货的补货周期对牛鞭效应存在明显的影响,较长周期下的牛鞭效应相对于较短周期要严重。 相似文献
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M.A Rahim 《The International Journal of Advanced Manufacturing Technology》2006,29(1-2):197-201
In single-period inventory models, neither excess demand nor excess inventory can be carried forward to the next period. In
stochastic multi-period models, an order is placed at some point in time during the cycle, and lead-time is considered to
be either constant or random. Lead-time demand, however, is assumed to be probabilistic. At the time an order is placed, the
amount of inventory which will be on hand when replenishment arrives is unknown. In this paper, we propose a variation of
these models to determine the optimal economic order quantity. Shipments arrive according to a Poisson process. The status
of the inventory becomes known at the time of the arrival of the shipment, and the selection of order quantity is made at
that time. However, the arrival time of future shipments is uncertain. It is also demonstrated that traditional single- and
multi-period inventory models can be obtained as special cases of the proposed model. 相似文献
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为提高协同补货的高效性和智能性,运用多层分解法模型,建立了基于多智能体的分销链协同补货模型.在借鉴前人库存成本优化理论的基础上,以需求预测更新、惩罚或激励机制为前提,给出了基于传统规划理论的动态补货Agent和基于不同权重的协同补货Agent.案例分析了以补货量为变量的分销链两层公司广日j的补货期望成本优化问题,并运用遗传算法进行模拟,验证了动态补货Agent中的随机需求变化和协同补货Agent中的权重变化对分销链补货量和补货成本的动态影响.该模型和仿真结果表明,基于多智能体的动态协同补货模型具有动态性、交瓦性和智能性的特性,是有效可行的. 相似文献
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A lubrication scheme for MEMS electrostatic lateral output motors based on a mixture of bound and mobile lubricant was studied. Lubrication by bound monolayer alone provided some increase in operational life, but after a short time, the film wore away and the device failed in the unlubricated mode. A mobile phase was used to provide lubricant replenishment. Tribological studies were conducted on Si(100) wafers, as well as on MEMS electrostatic lateral output motors, dip-coated with a mixture of bound and mobile phases of Fomblin Zdol. Accelerated screening tests on Si(100) wafers were undertaken using a pin on disk tribometer. However, the optimum balance of bound and mobile phases was determined by studies on the device itself. The fractional surface coverage of lubricant and the ratio of bound to mobile phase was varied through selection of reaction temperature and rinse chemistry. The mobile phase on model surfaces and devices acted as a source of lubricant replenishment, and together with the bound phase provided dramatic improvement in performance. The wide variation seen in the performance of individual devices suggests that dip coating does not provide a uniform coating on the contacting surfaces of these devices. 相似文献
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简要介绍了应用于火电站锅炉的水冷壁清扫、检测的永磁吸附爬壁机器人的本体结构设计。阐述了机器人在此特殊工作环境中存在的设计难点 ,提出了机器人的本体结构设计方案和纠偏机构 ,并对其进行了静态和动态的受力分析 ,确定单个磁性吸附块的最小吸力、电机的力矩等参数。 相似文献
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Dongseok Ryu Chang-Soon Hwang Sungchul Kang Munsang Kim Jae-Bok Song 《Journal of Mechanical Science and Technology》2005,19(10):1864-1874
This paper describes a wearable multi-modal user interface design and its implementation for a teleoperated field robot system.
Recently some teleoperated field robots are employed for hazard environment applications (e.g. rescue, explosive ordnance
disposal, security). To complete these missions in outdoor environment, the robot system must have appropriate functions,
accuracy and reliability. However, the more functions it has, the more difficulties occur in operation of the functions. To
cope up with this problem, an effective user interface should be developed. Furthermore, the user interface is needed to be
wearable for portability and prompt action. This research starts at the question: how to teleoperate the complicated slave
robot easily. The main challenge is to make a simple and intuitive user interface with a wearable shape and size. This research
provides multi-modalities such as visual, auditory and haptic sense. It enables an operator to control every functions of
a field robot more intuitively. As a result, an EOD (explosive ordnance disposal) demonstration is conducted to verify the
validity of the proposed wearable multi-modal user interface. 相似文献