关键词： learning and adaptive systems   cognitive robotics   autonomous agents   cognitive robotics   AI reasoning methods  

摘要： We develop a technique to automatically generate a control policy for a robot moving in an environment that includes elements with unknown, randomly changing behavior. The robot is required to achieve a surveillance mission, in which a certain request needs to be serviced repeatedly, while the expected time inbetween consecutive services is minimized and additional temporal logic constraints are satisfied. We define a fragment of linear temporal logic to describe such a mission and formulate the problem as a temporal logic game. Our approach is based on two main ideas. First, we extend results in automata learning to detect patterns of the unknown behavior of the elements in the environment. Second, we employ an automata-theoretic method to generate the control policy. We show that the obtained control policy converges to an optimal one when the partially unknown behavior patterns are fully learned. In addition, we illustrate the method in an experimental setup, in which an unmanned ground vehicle, with the help of a cooperating unmanned aerial vehicle (UAV), satisfies a temporal logic requirement in a partitioned environment whose regions are controlled by barriers with unknown behavior.

关键词： Robotics   Motor adaptation   Impedance   Upper extremity   Robot-mediated rehabilitation   Upper limb rehabilitation  

摘要： The InMotion2 and other similarly designed robots, are commonly used for rehabilitation of neurological injuries and motor adaptation studies. These robots are used to simulate haptic environments;however, anisotropy in end-point impedance due to the intrinsic robot dynamics can compromise these experiments. The goal was to decrease the magnitude and anisotropy of the robot impedance using a dynamic compensation algorithm that reduces the forces normally felt by the user during rapid movements. We tested this algorithm with two different methods for real-time calculation of derivatives, a novel quadratic fit method (CQF) and the commonly used backward derivative method (CBD). Six subjects performed a series of point-to-point movements under three conditions (no compensation, CQF, CBD), in different directions at peak speeds of 50, 100 and 150 cm/s. Without compensation, tangential peak-to-peak forces were as large as 69 N in certain directions at the 150 cm/s speed. Both CQF and CBD significantly reduced tangential forces in all directions and speeds. CQF outperformed CBD in the directions with highest intrinsic impedance, reducing tangential forces by 64% in these directions. Compensation also significantly reduced forces normal to the movement direction, with CQF again outperforming CBD in several cases. Anisotropy was assessed by the range of tangential peak-to-peak forces across movement directions. In the no compensation condition, anisotropy was as high as 52.7 N at the 150 cm/s speed, but an average anisotropy reduction of 74% was achieved with CQF. The CQF method can significantly reduce impedance and anisotropy in this class of robot. (c) 2013 Elsevier B.V. All rights reserved.

关键词： OPERATING systems (Computers)   ROBOTICS   COMPUTER multitasking  

摘要： The article focuses on the increasing trend of using the robot operating system (ROS) software to emerging breeds of quasi-commercial, industrial, and prosthetic robots. The expansion of using ROS to handle multiple controllers, multiplexing information, and feedback data is stated. According to Erik Nieves, technology director of Yaskawa America Inc., ROS is a growing library of developer and functions tools. The limitations and strengths of ROS is also explored.

关键词： 工程训练   自主学习性   应用创新型人才  

摘要： 根据国家、社会、企业对人才的要求,结合应用创新型人才培养模式,工程训练指导教师应通过不断完善工程训练教学内容和方法,提高学生的自主学习性,为培养应用创新型人才打下良好的基础。

关键词： DELMIA软件   机器人学   装配   碰撞   焊接  

摘要： 应用DELMIA/IGRIP软件实现了工业机器人装配、焊接的运动轨迹建模仿真,建模仿真结果表明:利用DELMIA/IG-RIP实现工业机器人运动轨迹的建模仿真,确保了设计人员在策划工业机器人或工业机器人操作时的可行性、效率性和安全性,并可节省大量时间,为工业机器人运动轨迹的分析设计和建模提供了可靠的依据,提高了企业的数字化制造水平。

关键词： 3D仿真平台   中学生   思维品质   机器人竞赛  

摘要： 思维是人类的高级心理活动，是复杂的信息加工过程，是人脑对事物本质和事物之间规律性关系的概括、间接的反映。本文以第十届浙江省青少年虚拟机器人竞赛项目为例，从任务目标的达成、组建虚拟机器人、编制机器人程序三个角度来谈5D仿真平台下中学生思维灵活性的培养。

关键词： ADAMS软件   并联机器人   动力学仿真  

摘要： 对于并联机器人机构来说,其刚体动力学模型具有多变量、多参数耦合的特点,因而型式复杂,使动力学的求解时间长而难以满足控制系统的实时性要求。借助ADAMS软件,构造并联机器人虚拟样机模型,分析并联机器人的动力响应,为实际的样机调试和设计提供了有意义的借鉴。

关键词： 屈膝行为   被动动力学行走   双足运动   机器人学  

摘要： 参考人类下坡行走运动特点,提出一种具有屈膝行为的双足被动行走模型.采用5质点4杆被动行走模型,设计支撑腿在行走过程中弯曲,通过对支撑腿膝关节弯曲时刻的调整,求解得到模型在不同斜面上的稳定周期行走步态.仿真结果表明,模型实现了在坡度范围小于0.39rad的斜面上稳定行走步态.与传统步态相比,稳定行走的坡度范围显著提高,在较大坡度上也具有很好的稳定性.

关键词： 绳驱动   拟人臂机器人   动力学   张力分析  

摘要： 与传统的机械臂相比,绳驱动拟人臂机器人采用串并混联的结构形式,模拟了人手臂肌肉的并联驱动方式,但是,绳索的引入也增加了动力学分析的难度.将绳驱动拟人臂机器人视为基座、大臂、小臂和末端四连杆串联机构,采用迭代牛顿-欧拉法建立动力学方程的递推形式,考虑绳驱动的冗余特性和绳索的单方向受力性,提出基于动态最小预紧力的张力分配算法,求解出各绳索的驱动力.与未进行张力分配的方法及基于静态最小预紧力的方法相比,所提出的算法可使各绳索驱动力根据动态最小预紧力进行实时调节,满足了不同工作条件下机构的刚度要求.

关键词： 机器人竞赛   教学活动   经验   设计过程   计算机编程   高科技产品   2008年   科技人员  

摘要： 让学生在机器人实验室里创造和设计自己的机器人，并用计算机编程，让他们体会工程师和科技人员研究高科技产品的设计过程，这是一项很有意义的活动。为了利用好机器人教学平台，促进学生的创新精神发展，2008年我校在全市率先成立了机器人兴趣小组。小组成立以来，先后获得第9届、第10届中国青少年机器人竞赛（山西赛区）超级轨迹项目冠亚军，第4届、第6届香港“创协杯”机器人大赛“再探月”项目冠军，