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2020 5th International Conference on Automation, Control and Robotics Engineering (CACRE)最新文献

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Research on modeling method of Globoidal Cam mechanism 弧面凸轮机构建模方法研究
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9229899
Z. Ge, Qiujie Zhao, Jiawei Li
Taking the globoidal CAM mechanism as the research object, this paper deduces the calculation equation of globoidal CAM contour surface and pressure Angle, and summarizes the general motion law of globoidal CAM follower. On this basis, the design software of globoid CAM is developed to realize the globoid CAM mechanism, including globoid indexing CAM, globoid deceleration CAM, globoid CAM with oscillating roller follower, as well as the contour data output of ATC multi-head globoid CAM, cutter position processing data output, and the verification of mechanism pressure Angle. Finally, ATC multi-head cambered mechanism is taken as an example to realize the establishment of its model and kinematic simulation, and the rationality of the design is verified.
以弧面凸轮机构为研究对象,推导出弧面凸轮轮廓面和压力角的计算公式,总结出弧面凸轮从动件的一般运动规律。在此基础上,开发了弧面凸轮设计软件,实现了弧面凸轮机构,包括弧面分度凸轮、弧面减速凸轮、摆动滚子从动件弧面凸轮,以及ATC多头弧面凸轮的轮廓数据输出、刀位加工数据输出、机构压力角验证。最后以ATC多头弧面机构为例,实现了其模型的建立和运动仿真,验证了设计的合理性。
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引用次数: 0
Study on detection technique of Asbestos in Brake Pads 刹车片中石棉检测技术研究
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230123
Hongwei Wang, Defu Xia, Weizhe Zhao, Jun Liu, Yusong Zhu, Bin Hu, Hongwei Su
Asbestos is highly fire-resistant, and electrically and thermally insulating, and it is a type of important industrial material. At the same time, however, this type of substance is proven to be highly dangerously carcinogenic. Asbestos fiber is harmful to human health, and it is important to test the asbestos in products. There is no applicable specification available in our country for the method of determining the asbestos in Brake Pads. In this paper, one method of using a polarizing microscope with a X-ray diffraction is used to identify the asbestos. Firstly, the characteristic features of the specimen was obtained under a polarizing microscope, if any fibrous particle exists, further test will be made with the help of a X-ray diffraction. If the fiber under observation has asbestos diffraction peak, it will be initially determined that the fiber under observation is the asbestos fiber. Otherwise, it will be determined that the fiber under observation is not asbestos fiber particles, and no asbestos has been found in the specimens. The other method of using a scanning electron microscope with a X-ray diffractometer is used to identify the asbestos in automotive brake pads, and this method is simple, fast, reliable and suitable to be widely applied. And the result shows that this method of testing for asbestos in brake pads through polarizing microscope and X-ray diffraction or a scanning electron microscope and X-ray diffractometer are simple, reliable and suitable to be widely applied.
石棉具有高度的耐火、绝缘和隔热性能,是一种重要的工业材料。然而,与此同时,这类物质被证明是高度危险的致癌物。石棉纤维对人体健康有害,对产品中石棉的检测十分重要。对于刹车片中石棉含量的测定方法,我国尚无适用的规范。本文介绍了一种利用x射线衍射偏光显微镜对石棉进行鉴定的方法。首先,在偏光显微镜下获得试样的特征特征,如果存在纤维颗粒,将借助x射线衍射进行进一步测试。如果观察纤维有石棉衍射峰,则初步确定观察纤维为石棉纤维。否则,将判定所观察的纤维不是石棉纤维颗粒,且在试样中未发现石棉。另一种方法是利用扫描电子显微镜结合x射线衍射仪对汽车刹车片中的石棉进行鉴定,该方法简便、快速、可靠,适合广泛应用。结果表明,用偏光显微镜和x射线衍射仪或扫描电镜和x射线衍射仪检测刹车片中石棉的方法简单、可靠,适合广泛应用。
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引用次数: 2
Fiducial marker-based Metric Initialization for Monocular SLAM 基于基准标记的单目SLAM度量初始化
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230158
M. Zhou, Jianjun Gui, Baosong Deng, Dengke Xu, Ye Yan
This paper proposes a novel approach for metric monocular SLAM Initialization using keypoints and a fiducial marker. SLAM approaches using one camera only can obtain the scale relevant to initial movement and the reference world origin must be attached to the initial frame. These make monocular SLAM approaches hard to achieve metric scale in localization and navigation problems or to provide true scale reference in augmented reality applications. In this paper, a fiducial marker is adopted at the initialization stage of SLAM. The relative and the absolute scale for 3D coordinates of some particular visual features would be calculated. The initial map would be adjusted by the ratio of these two values at the same time. Our experimental results show that feature-based monocular SLAM can acquire metric scale and the world origin can be coordinated to the marker plane after initialization. The scale outputs can reach centimeter accuracy with real-time performance in a normal computing unit.
提出了一种利用关键点和基准标记进行度量单眼SLAM初始化的新方法。SLAM方法只能使用一台相机获得与初始运动相关的尺度,并且参考世界原点必须附加在初始帧上。这使得单目SLAM方法难以在定位和导航问题中达到公制尺度,也难以在增强现实应用中提供真实的尺度参考。本文在SLAM初始化阶段采用基准标记。计算特定视觉特征三维坐标的相对比例尺和绝对比例尺。初始地图将同时根据这两个值的比值进行调整。实验结果表明,基于特征的单目SLAM可以获得度量尺度,初始化后的世界原点可以协调到标记平面。该刻度输出可达到厘米级精度,在普通计算单元中具有实时性。
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引用次数: 0
Research on Adaptive Friction Compensation for Electric Linear Load Simulator Based Backstepping controller 基于反步控制器的电动线性负载模拟器自适应摩擦补偿研究
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230180
Da-Wei Cao, Yuan-Xun Fan, Wei-Dong Pan, Peng-Cheng Lu, Jian-Wei Zhang
The electric linear load simulator (ELLS) is one kind of servo system with uncertainties and disturbances such as friction nonlinear characters. In order to improve the loading accuracy of ELLS system, aiming at the friction torque existing in the system, we present adaptive friction Backstepping controller based on the LuGre friction model. Using Lyapunov stability theorem to prove the global asymptotic stability of the system. Backstepping control theory reorganizes system equations into multiple virtual subsystems. Design virtual control variables for each virtual subsystems, and obtain the system nonlinear controller by Backstepping recursion. Finally, simulation results show that: compared with the traditional force command feedforward compensation + PID controller, the adaptive friction Backstepping controller can better suppress the excess force, ELLS system output can achieve asymptotic tracking of the given force reference signal. The proposed control method can better suppress the effect of friction on ELLS system and improve the loading accuracy.
电动线性负载模拟器(ELLS)是一种具有摩擦非线性等不确定性和干扰的伺服系统。为了提高ELLS系统的加载精度,针对系统中存在的摩擦力矩,提出了基于LuGre摩擦模型的自适应摩擦反演控制器。利用Lyapunov稳定性定理证明了系统的全局渐近稳定性。退步控制理论将系统方程重组为多个虚拟子系统。为每个虚拟子系统设计虚拟控制变量,并通过反步递归得到系统的非线性控制器。最后,仿真结果表明:与传统力指令前馈补偿+ PID控制器相比,自适应摩擦反步控制器能更好地抑制多余力,ELLS系统输出能实现给定力参考信号的渐近跟踪。所提出的控制方法能较好地抑制摩擦对ELLS系统的影响,提高加载精度。
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引用次数: 0
Three-dimensional Path Following of Underactuated AUV Based on Nonsingular Terminal Sliding Mode Control 基于非奇异末端滑模控制的欠驱动水下航行器三维路径跟踪
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230236
F. Wang, Chen Guo, Haomiao Yu, Hengyin Cui
This paper studies path-following control of underactuated autonomous underwater vehicle (AUV) with parameter perturbation and time-varying disturbances. First, the three-dimensional path following error equation is established through the Serret-Frenet frame. Then, the kinematics guidance laws of underactuated AUV are established by backstepping method. And the dynamic controller is designed through nonsingular terminal sliding mode control (NTSMC) method and extended disturbance observer (EDO), so that AUV can keep up with the desired velocity on external disturbances. Finally, it is proved that the designed path-following controller can make the error converge globally asymptotically. Simulation shows that this method can accomplish the task of path tracking control well.
研究了参数摄动和时变扰动下欠驱动自主水下航行器(AUV)的路径跟踪控制。首先,通过Serret-Frenet框架建立三维路径跟踪误差方程;然后,采用反步法建立欠驱动水下机器人的运动制导规律。采用非奇异末端滑模控制(NTSMC)方法和扩展扰动观测器(EDO)设计了动态控制器,使水下航行器在受到外界扰动时仍能保持预期速度。最后证明了所设计的路径跟踪控制器能使误差全局渐近收敛。仿真结果表明,该方法能较好地完成路径跟踪控制任务。
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引用次数: 1
Research on control strategy for ground extension and retraction test of landing gear 起落架地面放放试验控制策略研究
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230073
Linhai Zhang, Yeming Yao, Lilin Xu
During take-off and landing of airplanes, landing gear control system features have huge influence on airplane safety. In this paper, Labview software, a virtual instrument from National Instruments Corporation is used as a development platform to apply its powerful G language programming ablity and friendly program design interface to develop system application in order to enable control of landing gear extension and retraction and perform landing gear-related ground tests under laboratory conditions.
在飞机起降过程中,起落架控制系统的特性对飞机的安全性能影响很大。本文以美国国家仪器公司的虚拟仪器Labview软件为开发平台,利用其强大的G语言编程能力和友好的程序设计界面,开发系统应用程序,实现起落架收放控制,并在实验室条件下进行起落架相关地面试验。
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引用次数: 0
Analysis And Simulation Of The Feasibility Of A Self-deformable Reconfigurable Multi-mode Obstacle-crossing Mobile Robot 自变形可重构多模式跨障移动机器人可行性分析与仿真
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230205
An Ping, Chunyan Zhang
In this paper, a reconfigurable multi-mode walking-rolling mobile robot is used as a motion unit foot. Through a self-deformable reconfigurable multi-mode obstacle-crossing robot that can make different motion unit feet in different motion modes for obstacle climbing is proposed. The mobile robot is composed of 4 reconfigurable multi-mode stepping mobile robot motion units and I-shaped brackets with the same structure. Through gait analysis, it is found that the mechanism has two different movements: four-bar walking over obstacles and six-bar deformation over obstacles rolling. Through the establishment of the virtual prototype and simulation environment of the robot in ADAMS, simulation experiments were carried out for each movement mode to simulate and verify the feasibility of each movement mode.
本文采用可重构多模式步行-滚动移动机器人作为运动单元脚。提出了一种可自变形可重构的多模式越障机器人,该机器人可以在不同的运动模式下产生不同的运动单元足。该移动机器人由4个可重构的多模式步进移动机器人运动单元和具有相同结构的i型支架组成。通过步态分析,发现该机构有两种不同的运动:四杆行走过障碍物和六杆变形过障碍物滚动。通过在ADAMS中建立机器人的虚拟样机和仿真环境,对每种运动方式进行仿真实验,仿真验证每种运动方式的可行性。
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引用次数: 0
Pre-impact Trajectory Planning of Nonredundant Free-Floating Space Manipulator 非冗余自由浮动空间操纵器的撞击前轨迹规划
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230224
Qi Zhang, Guohua Kang, Jiaqi Wu, Han Zhang
The joint motion of the space manipulator and the collision between the end-effector and target may cause the attitude disturbance of the base. To minimize these two kinds of disturbances simultaneously, a pre-impact trajectory planning method for a nonredundant Free-Floating Space Manipulator (FFSM) system is proposed. Firstly, using the momentum conservation and nonholonomic characteristics, a transitional state between the initial state and the final capture state is added. This state can achieve the correct capture pose of the end-effector. Thereafter, the particle swarm optimization (PSO) algorithm is employed to optimize the transitional state and parameterized joint trajectory to minimize the base disturbance caused by joint motion and collision pulses. Finally, the proposed method is applied to a 6-DOF FFSM system. The results show that this method can realize the optimal pre-impact trajectory planning, and verify its effectiveness.
空间机械手的联合运动以及末端执行器与目标之间的碰撞可能会对基座造成姿态干扰。为了同时最小化这两种扰动,本文提出了一种非冗余自由浮动空间机械手(FFSM)系统的碰撞前轨迹规划方法。首先,利用动量守恒和非全局特性,在初始状态和最终捕获状态之间添加一个过渡状态。该状态可实现末端执行器的正确捕捉姿势。然后,采用粒子群优化(PSO)算法来优化过渡状态和参数化关节轨迹,以最小化关节运动和碰撞脉冲造成的基本干扰。最后,将提出的方法应用于 6-DOF FFSM 系统。结果表明,该方法可以实现最优的预碰撞轨迹规划,并验证了其有效性。
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引用次数: 3
Research on Sensorless Control Technology of Dual-winding PMSM 双绕组永磁同步电机无传感器控制技术研究
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230256
Chongchong Chang, Qixun Zhou
This paper aims at various problems existing in the traditional position sensorless control technology. First, it makes a detailed classification and comparison of the existing position sensorless control technology, and analyzes the advantages and disadvantages of various control technologies; secondly, it focuses on the dual winding permanent magnet The synchronous motor uses the high-frequency signal injection method to detect the rotor position at zero speed. There is a problem of extra torque ripple. According to the special structure of the dual-winding permanent magnet synchronous motor, a new dual-channel high-frequency signal injection method is proposed to avoid The generation of extra torque ripples improves the stability of the system. The correctness and feasibility of the theory are verified by SIMULINK simulation.
本文针对传统位置无传感器控制技术存在的各种问题进行了研究。首先,对现有的位置无传感器控制技术进行了详细的分类和比较,分析了各种控制技术的优缺点;其次,重点介绍了双绕组永磁同步电机采用高频信号注入法检测转子零转速位置。有一个额外的扭矩波动的问题。针对双绕组永磁同步电机的特殊结构,提出了一种新的双通道高频信号注入方法,避免了额外转矩波纹的产生,提高了系统的稳定性。通过SIMULINK仿真验证了该理论的正确性和可行性。
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引用次数: 0
Research and Implementation of Unknown Environment Map Construction Method with Lidar-based Robot 基于激光雷达机器人的未知环境地图构建方法研究与实现
Pub Date : 2020-09-01 DOI: 10.1109/CACRE50138.2020.9230033
Chenggang Lu, Jinxiang Wang, Xu Cui
The role of mobile robots is becoming more and more important. In the meantime, It is the basis for the robot to build a map in an unknown environment autonomously. In this paper, by using ROS robot and 360 distance laser sensor LDS-01, the laser scanning information is acquired in real-time, Synchronous map construction in real-time through the fusion of robot self-positioning information and environmental information. Update existing maps in real-time during the build process, ultimately enabling map construction of the entire unknown environment. By testing in the simulator Gazebo and building an indoor environment map, the test results in the actual environment show that the method of this paper can construct the unknown environment map more accurately and in real-time.
移动机器人的作用变得越来越重要。同时,它也是机器人在未知环境中自主绘制地图的基础。本文采用ROS机器人和360距离激光传感器LDS-01,通过融合机器人自身定位信息和环境信息,实时获取激光扫描信息,实时同步构建地图。在构建过程中实时更新现有地图,最终实现整个未知环境的地图构建。通过在模拟器Gazebo上的测试和室内环境图的构建,在实际环境中的测试结果表明,本文方法可以更准确、实时地构建未知环境图。
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引用次数: 0
期刊
2020 5th International Conference on Automation, Control and Robotics Engineering (CACRE)
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