Locomotion by mechanical pectoral fins

The objectives of this study were the development of a new device for maneuvering an underwater vehicle using the mechanism of a fish swimming, an experimental and theoretical analysis of the hydrodynamic characteristics of the device, and its application to maneuvering a fish robot. Observations and experimental analysis of the pectoral fins of a black bass (Micropterus salmoides) revealed that the locomotion of the fish, such as swimming forward at low speed, swimming backward, and turning in a horizontal plane is generated by using a combination of a feathering motion and a lead-lag motion of the pectoral fins. A mechanical pectoral fin making a feathering motion and a lead-lag motion generates a thrust force in a range of phase differences between both motions. The unsteady vortex lattice method, including the effect of viscosity, can express fairly well the unsteady forces acting on the mechanical pectoral fin in the range of phase differences where it exerts the thrust force. The fish robot, consisting of a model fish body and a pair of mechanical pectoral fins, can not only swim forward and turn in almost the same position, but can also swim in a lateral direction without changing the yaw angle. Translation of an article that appeared in the Journal of The Society of Naval Architects of Japan, vol. 182 (1997): The original article won the SNAJ prize, which is awarded annually to the best papers selected from the SNAJ Journal, JMST, or other quality journals in the field of naval architecture and ocean engineering.     

两自由度并联机器人的RBF神经网络辨识自适应控制

针对平面两自由度五杆并联机器人的轨迹跟踪问题,提出了一种基于RBF神经网络的自适应PID控制方法.该控制方案利用RBF神经网络自适应学习辨识并联机器人系统的未知非线性动态,可以在线调整PID控制参数以实现高精度控制.仿真结果显示该控制策略可以精确实现对于并联五杆机器人的轨迹跟踪控制,该方法的自适应性和跟踪性能均优于传统的PID控制.     

基于多连杆的机器人步行机构运动特性分析

在研究设计机器人步行系统过程中,对所设计机器人步行机构的运动特性进行了理论分析和仿真实验,得出了步行机构落足点的运动轨迹曲线.步行机构为多连杆机构,共6组,每组结构相同.该机构采用1台电机,通过机构传动,来实现落足点周期性的运动,从而实现机器人的前进、后退以及一定范围内的越障.该步行机构满足落足点运动轨迹的一般要求：前半个周期实现迈步动作,落足点尽可能的高于地面,并有一定的水平位移;后半个周期使落足点回到初始位置,并保证其轨迹尽可能的与地面平行.     

小波分析在弧焊机器人视觉检测中的应用

针对弧焊机器人薄板对接、搭接焊缝的自动焊接问题,将小波分析应用在CCD直接获取的焊缝图像的处理中,用来提取焊缝轨迹.根据薄板的对接和搭接焊缝图像的特点,建立了斜坡型及梯形小波分析模型,通过对模型的多尺度小波变换和李氏指数的分析,可以区分焊缝的边缘类型,从而增强了焊缝轨迹提取方法的抗干扰性和适应性,也为弧焊机器人的自动化和智能化焊接提供一定的技术参考.     

汽车冲压自动生产线技术及应用

简述了汽车冲压生产线的发展过程,并对自动冲压线进行了介绍。其中对机器人自动线、快速线（线性机械手自动线）和大型多工位压力机作了详细介绍.并对各自动线的特点进行了分析比较。     

测量机器人在黄土地区地铁结构安全保护中的应用

以西安地铁2号线安全保护区内施工的南门广场改造提升项目及南门隧道工程为依托,对永宁门车站及钟楼站—永宁门区间隧道进行测量机器人自动化监测。通过对监测数据的分析,证明自动化监测具有较高的可靠性,可代替传统测量手段应用于地铁结构的安全监测。研究显示,受上覆土体开挖的影响,盾构隧道会出现隆起及竖椭圆受力变形。     

基于组合自动优化策略的水下机器人型线设计（英文）

In this paper, a hybrid automatic optimization strategy is proposed for the design of underwater robot lines. Isight is introduced as an integration platform. The construction of this platform is based on the user programming and several commercial software including UG6.0, GAMBIT2.4.6 and FLUENT12.0. An intelligent parameter optimization method, the particle swarm optimization, is incorporated into the platform. To verify the strategy proposed, a simulation is conducted on the underwater robot model 5470, which originates from the DTRC SUBOFF project. With the automatic optimization platform, the minimal resistance is taken as the optimization goal; the wet surface area as the constraint condition; the length of the fore-body, maximum body radius and after-body's minimum radius as the design variables. With the CFD calculation, the RANS equations and the standard turbulence model are used for direct numerical simulation. By analyses of the simulation results, it is concluded that the platform is of high efficiency and feasibility. Through the platform, a variety of schemes for the design of the lines are generated and the optimal solution is achieved. The combination of the intelligent optimization algorithm and the numerical simulation ensures a global optimal solution and improves the efficiency of the searching solutions.     

示教机器人分级控制系统的研究

本文提出了一种分级控制的示教机器人多微机控制系统的方案,同时设计了本系统的编程工具——示教盒和专用机器人语言。     

涂装车间PVC喷涂机器人工艺调试及质量控制

文章阐述了新车型在调试过程中,涂装车间PVC喷涂机器人喷涂工艺自主调试过程,着重讨论从机器人示教准备、机器人示教、带胶喷涂PVC质量调试三个方面。同时,阐述在新车型调试过程中出现的质量问题进行分析并提出创新的解决措施。     

六自由度可移动机械加工机器人的概念设计

为了满足机械加工作业智能化的需要,设计了一款六自由度四履带双摇臂机械加工机器人。介绍了其移动平台机械结构设计,该移动平台能够满足移动、转弯与越障等功能并承载刀具中心换刀机构;介绍了其机械臂的模块化设计,该机械臂可以实现钻、铣、镗等机械加工作业。对机械臂正逆运动学进行分析,并使用Matlab软件中的Robotics Toolbox功能进行仿真;对机械臂采用拉格朗日方程计算方法进行动力学计算,使用SolidWorks Motion功能对机械臂进行动力学仿真。分析结果表明,所设计的机器人能够满足使用要求。