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基于模糊逻辑的移动机器人智能控制器设计（英文） 总被引：3，自引：0，他引：3
为了提高移动机器人在未知环境下的自主性,设计了一种基于模糊逻辑的智能控制器.该控制器可以辅助装备多传感器的机器人在室内未知环境下安全地进行自主导航.首先,基于模糊逻辑设计了2种实现移动机器人智能导航的行为：路径追踪行为和避障行为.使用模糊逻辑的方法可以通过模仿人类驾驶经验,降低移动机器人在未知环境下实现自主导航的复杂性.然后,利用有限状态机对2种行为进行融合,以确保在未知的室内环境下机器人能够安全地追踪一条事先指定的路径.控制器的输入为机器人的传感器数据,输出为要求机器人运动的方向.最后,仿真和实验结果证实了该控制器的有效性. 相似文献
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A weighted time-based global hierarchical path planning method is proposed to obtain the global optimal path from the starting point to the destination with time optimal control. First, the grid- or graph-based modeling is performed and the environment is divided into a set of grids or nodes. Then two time-based features of time interval and time cost are presented. The time intervals for each grid are built, during each interval the condition of the grid remains stable, and a time cost of passing through the grid is defined and assigned to each interval. Furthermore, the weight is introduced for taking both time and distance into consideration, and thus a sequence ofmultiscale paths with total time cost can be achieved. Experimental results show that the proposed method can handle the complex dynamic environment, obtain the global time optimal path and has the potential to be applied to the autonomous robot naviga- tion and traffic environment. 相似文献
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A system for mobile robot localization and navigation was presented.With the proposed system,the robot can be located and navigated by a single landmark in a single image.And the navigation mode may be following-track,teaching and playback,or programming.The basic idea is that the system computes the differences between the expected and the recognized position at each time and then controls the robot in a direction to reduce those differences.To minimize the robot sensor equipment,only one omnidirectional camera was used.Experiments in disturbing environments show that the presented algorithm is robust and easy to implement,without camera rectification.The rootmean-square error(RMSE) of localization is 1.4,cm,and the navigation error in teaching and playback is within 10,cm. 相似文献
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移动机器人在工业生产和社会生活中逐步得到应用。路径规划是移动机器人完成其任务的前提和基础,也是机器人导航的核心技术。针对移动机器人在现有局部路径规划中无法自适应复杂环境、规划路径不合理等问题,提出基于权值自适应的局部路径规划方法。利用传感器信息自动获取合理的目标函数权值,实现具有较高实时性、安全性和鲁棒性的局部路径规划。实验结果表明,改进的动态窗口法能有效自适应复杂环境,规划的路径安全、合理、平滑,算法效率明显提升,计算量和迭代次数明显减少,总运行时间缩短20%以上。 相似文献
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《天津大学学报(英文版)》2017,(5)
To implant radioactive seeds through a needle precisely and safely, a novel multi-DOF surgical robotic system is presented in this paper for percutaneous prostate intervention through the patient's perineum under real-time ultrasound image guidance. The proposed robot, which is designed with 9-DOF, consists of a 3-DOF automatic location platform for position adjustment, 2-DOF for automatic ultrasonic probe adjustment mounted with electromagnetic trackers, and 4-DOF for manually adjusting the guided template. Meanwhile, a new registration method based on the quaternion algorithm and least square method is developed, and the needle insertion is performed under the realtime guidance of a navigation system. Furthermore, the robot system has undergone some preliminary experiments with a laser tracker to evaluate the repeatability and accuracy of the robot system. The location error of the puncture needle tip can be controlled under 0.7 mm in air for the whole robotic system. The acquired results endorse the precision of the robot system for prostate seed implantation brachytherapy. 相似文献
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环境艺术设计是创造现代“室文化”的一门综合学科。“室文化”既包括室外文化,又包括室内文化,那么建筑就是界于联系室内与室外之间的一个载体。从历史的发展、空间的概念和审美的要求来看建筑与环境是密不可分的,要想学好室内、室外文化,就必须先了解建筑文化,也就是必须先学好建筑设计。 相似文献
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张旭 《江苏经贸职业技术学院学报》2012,(4):48-51
智能家居是一个融合了通信原理、控制技术的控制系统。随着人工智能的发展,智能机器人逐渐渗透到高端智能家居生活中。主要研究嵌入式系统在智能家居控制系统中的应用,通过IAR EWARM嵌入式集成开发环境,实现基于ARM架构设计的机器人在智能家居控制系统中的基本功能,介绍软件的开发环境和具体的算法。 相似文献
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LIANG Hai-hua ZHU Miao-liang 《浙江大学学报(A卷英文版)》2006,7(10):1652-1661
INTRODUCTION Model driven generative domain engineering (MDGDE) is improved on the basis of generative programming (Czarnecki and Ulrich, 2000) for the purpose of benefiting from the new emerging soft- ware engineering methods, such as agent oriented software engineering (Wooldridge, 1997), model driven architecture (MDA) (Kleppe et al., 2003) and aspect-oriented software development (AOSD) (Filman et al., 2004), etc. Agents are regarded as some special objects having more autonomy,… 相似文献
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REN Yong-feng 《教育技术导刊》2008,(3)
介绍一种基于模块化的技术来实现面向服务和消息驱动的架构,并且基于标准建模语言来对资源、事件和应用进行建模。该技术能够实现动态事件发布和订阅、事件轮询、事件过滤和指示。 相似文献
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SLAM is one of the most important components in robot navigation. A SLAM algorithm based on image sequences captured by a single digital camera is proposed in this paper. By this algorithm, SIFT feature points are selected and matched between image pairs sequentially. After three images have been captured, the environment＇s 3D map and the camera＇s positions are initialized based on matched feature points and intrinsic parameters of the camera. A robust method is applied to estimate the position and orientation of the camera in the forthcoming images. Finally, a robust adaptive bundle adjustment algorithm is adopted to optimize the environment＇s 3D map and the camera＇s positions simultaneously. Results of quantitative and qualitative experiments show that our algorithm can reconstruct the environment and localize the camera accurately and efficiently. 相似文献
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Path tracking control of autonomous agricultural mobile robots 总被引：3，自引：0，他引：3
ZHU Zhong-xiang CHEN Jun YOSHIDA Toyofumi TORISU Ryo SONG Zheng-he MAO En-rong 《浙江大学学报(A卷英文版)》2007,8(10):1596-1603
In a tractor automatic navigation system, path planning plays a significant role in improving operation efficiency. This study aims to create a suboptimal reference course for headland turning of a robot tractor and design a path-tracking controller to guide the robot tractor along the reference course. A time-minimum suboptimal control method was used to generate the reference turning course based on the mechanical parameters of the test tractor. A path-tracking controller consisting of both feedforward and feedback component elements was also proposed. The feedforward component was directly determined by the desired steering angle of the current navigation point on the reference course, whereas the feedback component was derived from the designed optimal controller. Computer simulation and field tests were performed to validate the path-tracking performance. Field test results indicated that the robot tractor followed the reference courses precisely on flat meadow, with average and standard lateral devia- tions being 0.031 m and 0.086 m, respectively. However, the tracking error increased while operating on sloping meadow due to the employed vehicle kinematic model. 相似文献
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INTRODUCTIONAutonomousnavigationisoneofthemostimportanttopicsinthemobilerobotareaandcanbecategorizedintotwoparts:reactivenavigation(Haddadetal.,1998)andpathplanning.Thefirstoneislocalpathplanningbasedandthesecondoneplansapathintheglobalworkspace .Localpat… 相似文献
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A novel robot navigation algorithm with global path generation capability is presented. Local minimum is a most intractable
but is an encountered frequently problem in potential field based robot navigation. Through appointing appropriately some
virtual local targets on the journey, it can be solved effectively. The key concept employed in this algorithm are the rules
that govern when and how to appoint these virtual local targets. When the robot finds itself in danger of local minimum, a
virtual local target is appointed to replace the global goal temporarily according to the rules. After the virtual target
is reached, the robot continues on its journey by heading towards the global goal. The algorithm prevents the robot from running
into local minima anymore. Simulation results showed that it is very effective in complex obstacle environments.
Project (No. 69904009) supported by the National Natural Science Foundation of China 相似文献
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A new hybrid event based control architecture for tele-robotic systems controlled through the Internet is proposed in this paper. Different from the traditional event based control method, the new framework does not require every part of the system to be strictly event synchronized. Instead, it allows time referenced control components to be integrated into this framework, which makes it more convenient to develop Internet based control systems. Since there are two reference variables, time and event, in this architecture, how to coordinate these components with different references to keep the stability of the whole system is discussed in detail in this paper. To verify this new idea, an experiment was conducted to control the end effector of a PUMA robot tracking a continuous state trajectory given on-line by the remote operator. Experimental results confirmed the stability of such systems being controlled through the Internet in real-time. 相似文献
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This paper discusses and compares some common architectures used in autonomous mobile robotics. Then it describes a behavior-based autonomous mobile robot that was implemented successfully in the Robotics Lab of the Department of Precision Mechanical Engineering. Fuzzy controller was used to implement the emergency behavior, the behaviors arbitration was implemented using the sub-sumption architecture. In an unknown dynamic indoor environment, the robot achieved real-time obstacle avoidance properties that are cruel for mobile robotics. 相似文献
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INTRODUCTION Networked Control System (NCS) is composed of a central controller and a remote system containing a physical plant, sensors and actuators (Halevi and Ray, 1988; Nilsson, 1998; Walsh et al., 1999a; 1999b; Branicky et al., 2000). The controller and the plant are located at different spatial locations and directly connected through network to form a closed loop control. Fig.1 shows the NCS configuration and the time delay induced by network, where u is the control signal an… 相似文献
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无迹卡尔曼滤波在新型地形无源组合导航系统中的应用 总被引：2，自引：0，他引：2
为了提高自主水下航行器的导航精度,提出了一种新型地形无源组合导航系统.根据水下环境特点和航行器导航高精度和低成本的要求,采用捷联式惯性导航系统、地形辅助导航系统、多普勒速度声纳、电子磁罗经和利用UKF进行信息融合的导航计算机组成新型水下地形无源组合导航系统,并给出了EKF线性滤波方程、UKF非线性滤波方程和导航传感器量测方程.对比仿真实验表明,采用建议的传感器和UKF信息融合方式比采用EKF方式提高了水下航行器导航定位的精度.采用不同的导航传感器和UKF信息融合方法的地形无源组合导航系统可以有效地减小水下航行器导航位置误差,提高组合导航的稳定性和精度. 相似文献