阀门喷涂机器人的轨迹规划与优化求解

为对特定阀门工件的外表自由曲面进行精确喷涂,提出以阀门外形尺寸和机器人本体结构为约束条件,对喷涂 机器人的工作空间进行了合理优化。利用MATLAB对多变量有约束非线性函数优化求解,得到了机器人主连杆杆长以 及相应的关节转角范围;对阀门进行了参数描述,并建立喷涂轨迹路径数学模型;通过基于ADAMS的虚拟样机建模、运 动仿真和MATLAB数值求解的相互协同和相互验证,得到了合理的关节角逆解。通过优化后的逆解进行仿真喷涂验证 了轨迹规划和优化求解方法的合理性。     

Throughput Optimization in Constant Travel‐Time Dual Gripper Robotic Cells with Parallel Machines

Constant travel‐time robotic cells with a single gripper robot and with one or more machines at each processing stage have been studied in the literature. By contrast, cells with a dual gripper robot, although more productive, have so far received scant attention, perhaps due to their inherent complexity. We consider the problem of scheduling operations in dual gripper robotic cells that produce identical parts. The objective is to find a cyclic sequence of robot moves that minimizes the long‐run average time to produce a part or, equivalently, maximizes the throughput. We provide a structural analysis of cells with one or more machines per processing stage to obtain first a lower bound on the throughput and, subsequently, an optimal solution under conditions that are common in practice. We illustrate our analysis on two cells implemented at a semiconductor equipment manufacturer and offer managerial insights for assessing the potential productivity gains from the use of dual gripper robots.     

Modified branching process for the reliability analysis of complex systems: Multiple-robot systems

Current design practice is usually to produce a safety system which meets a target level of performance that is deemed acceptable by the regulators. Safety systems are designed to prevent or alleviate the consequences of potentially hazardous events. In many modern industries the failure of such systems can lead to whole system breakdown. In reliability analysis of complex systems involving multiple components, it is assumed that the components have different failure rates with certain probabilities. This leads into extensive computational efforts involved in using the commonly employed generating function (GF) and the recursive algorithm to obtain reliability of systems consisting of a large number of components. Moreover, when the system failure results in fatalities it is desirable for the system to achieve an optimal rather than adequate level of performance given the limitations placed on available resources. This paper concerns with developing a modified branching process joint with generating function to handle reliability evaluation of a multi-robot complex system. The availability of the system is modeled to compute the failure probability of the whole system as a performance measure. The results help decision-makers in maintenance departments to analyze critical components of the system in different time periods to prevent system breakdowns.     

基于SNMP的HFC网络管理平台设计

光纤同轴混合网是一种发展前景广阔的宽带接入技术,完善的网络管理是保证网络正常营运的基础,也是网络高效稳健运行的关键。该文提出了一种基于简单网络管理协议的光纤同轴混合网网络管理系统的解决方案,其系统包括简单网络管理协议管理站和委托代理两部分,其委托代理通过通用串行接口实现了对设备的本地管理,网络管理站通过SNMP协议和委托代理交换管理信息,从而实现了对设备的远程管理。     

壁面清洗机器人发展趋势浅析

本文综述了国内外壁面清洗机器人的研究概况 ,重点介绍了几种典型的壁面清洗机器人 ,据此对壁面清洗机器人向实用化方向发展进行了论述 ,指出了利用风扇使清洗机构吸附于壁面 ,并将行走与清洗机构相分离 ,这种设计思路的优越性     

加强高校普通话测试站建设，发挥其多功能作用

本文根据普通话测试的发展现状来谈高校普通话测试站的重要性,并从测试管理、普通话教学、测试员管理、教研与科研以及普通话测试与推广普通话的关系等方面探讨如何加强高校的普通话测试站建设,更好地发挥其多功能作用.     

焊接机器人轨迹规划的研究现状

为了提高焊接效率、改善焊接质量的实际生产需求,对焊接机器人空间轨迹规划的方法及研究现状进行了综述, 对关节轨迹规划法和笛卡尔轨迹规划法做出了比较,指出了轨迹规划中存在的问题即如何更便捷地实现最优轨迹规划 和多种最优算法的统一,认为空间轨迹同焊接工艺参数进行联合规划将是未来研究的重点和方向。     

固定电机驱动的平面关节型机器人无参数运动学标定

针对传统平面关节型机器人（简称SCARA）运动臂质量大的缺点,设计一种固定电机驱动的SCARA。为提高其 精度用无参数化标定的方法进行运动学标定,根据D-H方法,在空间坐标转换的基础上建立了该SCARA的数学模型, 得到杆件间相对位置关系;通过外部测量设备测出末端执行器的位姿,利用运动学正逆解解出实际位姿与理论位姿之间 驱动输入的差值,补偿到理论的输入中,得到补偿后的动平台位姿。通过计算机仿真表明该标定方法能极大提高末端执 行器的位置精度,证明了无参数化标定方法的有效性和可靠性。     

认知科学美学与审美机器人

人类认知研究不仅表现在自然科学领域,还应表现在审美等人文领域。近十几年来,国内外的"认知科学与美学"研究都取得相当深刻的积极成果。特别是在中国,已经形成了相对完整的认知科学美学理论,对世界范围内的美学难题作出了科学化的新阐释,并提出了一些新的问题和假说。不过,认知科学还从来没有从美学的角度进行过专项研究及实验。如果相关实证研究得以进行,将最终地、彻底地揭示审美活动的本性,为审美实践提供具有可操作性的理论基础,还可以为审美机器人的开发提供可能。     

一种机器人寻线控制系统

介绍了一种机器人寻线控制系统。该系统在单片机的控制下,采集、存储、处理寻线系统输入的数字信号,并通过驱动系统来控制步进电机,使机器人按照预设的路线行走,该系统还具有自动纠偏、准确可靠、抗干扰能力强等特点,为机器人行走的准确性提供了可靠保证。