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2011 IEEE International Conference on Mechatronics and Automation最新文献

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Study on semi-active suspension system of tracked vehicle based on variable universe fuzzy control 基于变域模糊控制的履带车辆半主动悬架系统研究
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5986294
Lingjie Kong, Xinjun Zhao, B. Qi
The suspension system with high performances is an important factor ensuring the tracked vehicle mobility and comfortable in different situations. Magneto rheological dampers, which are semi-active suspension equipment that use magneto rheological fluids to produce controllable force, can be used as smart actuators to reduce the vibrations of mechanical systems. An analytical study is performed in this article to examine the effectiveness of this type of actuator in suppressing the vibrations of a tracked vehicle suspension system. Based on the fluid mechanics theory, an amendment dynamic model of magneto rheological damper is derived. Considering the suspension characteristic and uncertainty of a magneto rheological damper, a variable universe fuzzy controller is designed to achieve a control of active variable damping. The results proved that the derived magneto rheological damper dynamic model is correct and indicated that the designed variable universe fuzzy controller could reduce the tracked vehicle vibration, which will further establish the basis of engineering application for a magneto rheological damper on semi-active suspension.
高性能的悬架系统是保证履带车辆在不同情况下的机动性和舒适性的重要因素。磁流变阻尼器是一种利用磁流变流体产生可控力的半主动悬架设备,可以作为智能执行器来减少机械系统的振动。本文进行了一项分析研究,以检验这种类型的致动器在抑制履带式车辆悬架系统振动方面的有效性。基于流体力学理论,推导了磁流变阻尼器的修正动力学模型。针对磁流变阻尼器的悬架特性和不确定性,设计了变域模糊控制器来实现主动变阻尼的控制。结果证明了所建立的磁流变阻尼器动力学模型的正确性,并表明所设计的变域模糊控制器能够有效地降低履带车辆的振动,为磁流变阻尼器半主动悬架的工程应用奠定了基础。
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引用次数: 7
Megahertz-range magnetostrictive sensor for exciting longitudinal guided waves in steel rods/strands 用于在钢棒/钢绞线中激励纵导波的兆赫范围磁致伸缩传感器
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5986262
He Cunfu, Liu Xiucheng, Wu Bin, F. Hao
A flexible printed meander coil (FPMC)-based magnetostrictive sensor (MsS) which has a central frequency around 1.25 MHz is presented in this paper. The FPMC-based MsS can be easily wrapped onto the twisted strand surface and disassembled from the strand. It can be also installed onto the central rod of the strand after being wrapped into multiple layers. That is, this FPMC-based MsS can fit for the tested sample of different diameters. With the proposed megahertz-range FPMC-based MsS, the rods/strands inspection system is potential to be applied for practical inspections, having higher axial inspection resolution and sensitivity to small defects.
提出了一种中心频率约为1.25 MHz的柔性印刷弯曲线圈(FPMC)磁致伸缩传感器。基于fpmc的MsS可以很容易地包裹在扭曲的链表面并从链上拆卸。它也可以被包裹成多层后安装在股的中心杆上。也就是说,基于fpmc的MsS可以适用于不同直径的被测样品。基于兆赫级fpmc的MsS,棒/股检测系统具有更高的轴向检测分辨率和对小缺陷的灵敏度,具有应用于实际检测的潜力。
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引用次数: 1
Flow measurement using high speed spectral optical coherence tomography 高速光谱光学相干层析成像的流量测量
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5985826
Ma Zhenhe, Su Yixiong
Optical Coherence Tomography is a non-invasive imaging modality with high resolution (5 to 20μm) that can provide flow velocity information by calculating the Doppler frequency shift. In this paper, a high speed spectral domain optical coherence tomography system was demonstrated. An achievable scanning speed of 92k line/sec has been reached by using an ultra-high speed linear array CCD camera. The measurable flow velocity range is [−24, 24]mm/s using this system. Early stage Chicken embryo heart blood flow was measured in vivo.
光学相干层析成像是一种非侵入性成像方式,具有高分辨率(5至20μm),可以通过计算多普勒频移来提供流速信息。本文介绍了一种高速谱域光学相干层析成像系统。采用超高速线阵CCD相机可实现92k线/秒的扫描速度。该系统的可测流速范围为[−24,24]mm/s。在体内测定了早期鸡胚心脏血流量。
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引用次数: 0
Sparsed potential-PCNN for real time path planning and indoor navigation scheme for mobile robots 稀疏电位- pcnn移动机器人实时路径规划与室内导航方案
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5986339
S. U. Ahmed, U. Malik, Fahad Iqbal Khawaja, Y. Ayaz, F. Kunwar
One of the main problems associated with mobile intelligent agents is path planning. Numerous approaches have been presented for path planning of mobile robots. One of the most efficient methods is Pulse Coupled Neural Network (PCNN). This paper presents a novel approach we call the Sparsed Potential PCNN method for real time path planning for mobile robots. In the proposed method a Potential Field approach is used to limit the propagation of the autowave only in the direction of the destination rather than propagating in all directions. This increases the efficiency of the PCNN algorithm. Furthermore a sparsing technique is applied to make the algorithm even more time efficient. The algorithm has proven to be a robust and time efficient path planning scheme. The Sparsed Potential-PCNN plans the shortest path in the shortest possible time. The algorithm is also capable of avoiding obstacles in its path. Simulation results in Player/Stage for Pioneer 3 AT mobile robot navigating among obstacles in an indoor environment are also presented to demonstrate the effectiveness of the proposed algorithm.
与移动智能代理相关的主要问题之一是路径规划。对于移动机器人的路径规划,已经提出了许多方法。其中最有效的方法是脉冲耦合神经网络(PCNN)。本文提出了一种新的移动机器人实时路径规划方法,我们称之为稀疏势PCNN方法。在该方法中,利用势场法限制自动波只在目标方向上传播,而不是在所有方向上传播。这提高了PCNN算法的效率。此外,为了提高算法的时间效率,还采用了稀疏化技术。该算法是一种鲁棒性强、时间效率高的路径规划方案。稀疏电位- pcnn在最短的时间内规划最短的路径。该算法还能够避开路径上的障碍物。最后给出了先锋3号移动机器人在Player/Stage环境下的室内障碍物导航仿真结果,验证了该算法的有效性。
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引用次数: 3
On the design for AGVs: Modeling, path planning and localization agv的设计:建模、路径规划和定位
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5985974
Qi Sun, Hui Liu, Qiang Yang, W. Yan
Intelligent warehouse becomes a key component of logistics process automation, which essentially promotes the productivity and cost reduction. This paper presents a novel design solution of an Automated Guided Vehicles (AGVs) system for intelligent warehouse. An improved version of classical Dijkstra shortest-path algorithm is proposed for efficient global path planning. In the case of multi-AGV, the time windows method is used to address the issue of conflict and deadlock. In addition, the local path planning and auto-localization is addressed by using a heuristics-based algorithm and Monte Carlo Localization algorithm respectively. Extensive numerical experiments based on Player/Stage simulator are carried out to assess the suggested algorithms, for a range of scenarios and the result well validates its effectiveness. Currently the proposed design solution is adopted in developing the prototype of AGVs to be deployed in practice.
智能仓库成为物流过程自动化的重要组成部分,从本质上促进了生产效率和成本的降低。提出了一种智能仓库自动导引车(agv)系统的设计方案。为了实现高效的全局路径规划,提出了一种改进的经典Dijkstra最短路径算法。在多agv情况下,采用时间窗方法解决了冲突和死锁问题。此外,采用启发式算法和蒙特卡罗定位算法分别解决了局部路径规划和自动定位问题。基于玩家/舞台模拟器进行了大量的数值实验来评估所建议的算法,并在一系列场景中进行了测试,结果很好地验证了其有效性。目前,该设计方案已应用于agv样机的研制和实际部署。
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引用次数: 13
A level-set model driven by Bidimensional EMD for sonar image segmentation 基于二维EMD驱动的水平集模型用于声纳图像分割
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5985747
Xiufen Ye, Lei Wang, Tian Wang, G. Wang
This paper proposes a new multiphase level set model. Its energy function is driven by Bidimensional EMD (Empirical Mode Decomposition) to resolve the segmentation problem of sonar image. We introduce the EMD and BEMD, and give the steps of BEMD. It is used to extract intrinsic components of images. Then, we integrate them into the VC's (Vese-Chan) multiphase level set energy functions to resolve the sensitiveness of level set models to noise. Experimental results show that the segmentation results of our method is superior than the VC level set model.
本文提出了一种新的多相水平集模型。它的能量函数由二维经验模态分解(two - dimensional EMD, Empirical Mode Decomposition)驱动来解决声呐图像的分割问题。介绍了EMD和BEMD,并给出了BEMD的步骤。它用于提取图像的内在成分。然后,我们将它们整合到VC (Vese-Chan)多相水平集能量函数中,以解决水平集模型对噪声的敏感性。实验结果表明,该方法的分割效果优于VC水平集模型。
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引用次数: 6
Experimental study and DEM analysis on rigid driving wheel's performance for off-road vehicles moving on loose soil 松散土上越野车辆刚性驱动轮性能试验研究与DEM分析
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5985646
Runhuai Yang, Min Xu, Xu Liang, Shiwu Zhang, Yong Cheng, Hongcheng Xu, Jie Yang
An experimental and numerical investigation was carried out on the performance of a single-wheel travelling over various kinds of loose soil, including dry sand, wet sand, and mud. The experiments were conducted using a testbed equipped with a displacement transducer, a torque sensor, etc., to get the information on sinkage, driving torque, and drawbar pull. It was found that within certain water content, the trafficability of wet sand is better than that of the dry sand. On the other hand, the behaviour of a wheel when running over mud is very different comparing to the case of sand, for which the shear force tends to be negligible because of the near-flow property of the mud. It was also demonstrated that the cohesion of the mud can't be ignored since the mud will attach to the wheel so that the shear force is offered by the internal friction angle of mud rather than the friction between wheel and soil. In the numerical work, DEM (discrete element method) was used to simulate the interaction between wheel and sand, and the agreement with the experiments was fairly good.
对单轮在干砂、湿砂和泥浆等多种松散土上行驶的性能进行了试验和数值研究。在装有位移传感器、扭矩传感器等的试验台上进行了实验,获得了下沉、驱动扭矩和拉杆拉力的信息。结果表明,在一定含水量范围内,湿砂的通通性优于干砂。另一方面,车轮在泥浆上行驶时的行为与在砂土上行驶时的行为非常不同,由于泥浆的近流动特性,砂土上的剪切力往往可以忽略不计。同时也证明了泥浆的黏聚性是不可忽视的,因为泥浆会附着在车轮上,所以剪切力是由泥浆的内摩擦角提供的,而不是车轮与土之间的摩擦力。在数值计算中,采用离散元法(DEM)模拟车轮与砂土的相互作用,与实验结果吻合较好。
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引用次数: 8
Development of a novel rotor-embedded-type multidegree-of-freedom spherical ultrasonic motor 一种新型转子嵌入式多自由度球面超声电机的研制
Pub Date : 2011-08-15 DOI: 10.20965/jrm.2012.p0876
B. Lu, M. Aoyagi, H. Tamura, T. Takano
An actuator system with multidegree-of-freedom (MDOF) motion and complicated action has recently gained interest in the field of robotic technology. In the present paper, a novel rotor-embedded-type MDOF spherical ultrasonic motor (SUSM) is proposed. The MDOF-SUSM consists of a spherical rotor and a stator vibrator with an all-in-one structure. The spherical rotor is embedded in the center of an almost annular stator vibrator with a spherical inner surface, and a motor shaft is mounted on the rotor. The stator vibrator with piezoceramic disks and plates adhered to the surfaces of the vibrator can excite five vibration modes, independently and simultaneously. The spherical rotor can rotate around three axes by combining two of the five vibration modes. The present paper describes the basic construction and the operating principle of the rotor-embedded-type MDOF-SUSM, modal analysis results for the stator vibrator, and some experimental results based on a trial manufacture. The proposed MDOF-SUSM confirmed the operating principle of the design, and it has a simple structure and is compact and lightweight, a large torque-to-weight ratio is expected to be realized.
具有多自由度运动和复杂动作的作动器系统是近年来机器人技术领域的研究热点。本文提出了一种新型转子嵌入式多自由度球形超声电机。MDOF-SUSM由一个球形转子和一个定子振动器组成,采用一体化结构。球形转子嵌入内表面为球形的近环形定子振子的中心,电机轴安装在转子上。在定子激振器表面贴有压电陶瓷片和片,可分别激发和同时激发五种振动模式。球面转子通过组合五种振动模式中的两种,可以绕三轴旋转。本文介绍了转子嵌入式MDOF-SUSM的基本结构和工作原理、定子振子的模态分析结果以及在试制基础上的一些实验结果。所提出的MDOF-SUSM确认了设计的工作原理,结构简单,结构紧凑,重量轻,有望实现较大的扭矩重量比。
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引用次数: 12
Design and workspace analysis of a light weight and high stiffness arm 轻量高刚度臂的设计与工作空间分析
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5985632
Jing Li, Qiang Huang, Zhangguo Yu, Wei Xu, Xuechao Chen, Gan Ma
Most researchers have focused on biped walking control, gait pattern planning, and high stiffness design of legs especially in early years of humanoid research. In this paper, an anthropomorphic arm is designed in order to realize some complicated manipulations which involves light weight, high stiffness, and enough workspace. Light weight and high stiffness which contributes much to preventing the humanoid from tipping over and to achieving acceptable precision are mainly realized by means of modular design, dynamic simulation, and finite element analysis. Workspace related much to complicated manipulations is analyzed according to robot arm mechanism and the effects on the stability of the humanoid robot. Experiments are finally performed to verify the characteristics of the arm.
特别是在早期的仿人研究中,研究人员主要集中在两足行走控制、步态模式规划和腿部高刚度设计等方面。本文设计了一种拟人机械臂,以实现重量轻、刚度高、工作空间大的复杂机械操作。主要通过模块化设计、动态仿真和有限元分析等手段来实现轻量化和高刚度,这对防止仿人机器人倾覆和达到可接受的精度有很大的帮助。从机械臂机构出发,分析了与复杂操作相关的工作空间及其对仿人机器人稳定性的影响。最后通过实验验证了该机械臂的特性。
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引用次数: 2
Structure synthesis and optimization of a supporting medical manipulator for vascular interventional surgery 血管介入手术辅助医疗机械臂的结构合成与优化
Pub Date : 2011-08-15 DOI: 10.1109/ICMA.2011.5985642
Xing-tao Wang, Xing-guang Duan, Qiang Huang, Hong-hua Zhao, Yue Chen, Chao Chen
Conventional vascular interventional surgery (VIS) is performed by surgeons under fluoroscopic X-ray guidance. Catheter operating systems have been developed to reduce physical stress and X-ray irradiation to the interventional radiologists. However, the catheter operating systems are all attached to surgical bed or fixed at the tip of passive manipulator, which is inconvenient to adjust the position and orientation of catheter operating system. Therefore, a novel active supporting medical manipulator was developed to accurately position and firmly hold catheter operating system. The structure was synthesized and optimized according to the clinical VIS requirements. The mechanism was designed and kinematics was analyzed. Finally, the simulations and experiments showed the feasibility of the active supporting medical manipulator, which facilitate the control of catheter operating system in clinical teleoperating.
常规血管介入手术(VIS)是由外科医生在透视x线引导下进行的。导管操作系统的发展是为了减少介入放射科医生的身体压力和x射线照射。然而,导管操作系统均附着在手术床上或固定在被动机械手的尖端,不方便调整导管操作系统的位置和方向。为此,研制了一种新型主动支撑式医疗机械臂,以实现导管操作系统的准确定位和牢固托住。根据临床VIS要求对结构进行综合优化。设计了机构并进行了运动学分析。最后,通过仿真和实验验证了该主动支撑式医疗机械臂的可行性,为临床远程手术中导管操作系统的控制提供了便利。
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引用次数: 0
期刊
2011 IEEE International Conference on Mechatronics and Automation
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