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2021 6th IEEE International Conference on Advanced Robotics and Mechatronics (ICARM)最新文献

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Height Control and Optimal Torque Planning for Jumping With Wheeled-Bipedal Robots 轮式双足机器人跳跃的高度控制与最优力矩规划
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536196
Yulun Zhuang, Yuan Xu, Binxin Huang, Mandan Chao, Guowei Shi, Xin Yang, Kuangen Zhang, Chenglong Fu
This paper mainly studies the accurate height jumping control of wheeled-bipedal robots based on torque planning and energy consumption optimization. Due to the characteristics of underactuated, nonlinear estimation, and instantaneous impact in the jumping process, accurate control of the wheeled-bipedal robot’s jumping height is complicated. In reality, robots often jump at excessive height to ensure safety, causing additional motor loss, greater ground reaction force and more energy consumption. To solve this problem, a novel wheeled-bipedal jumping dynamical model(W-JBD) is proposed to achieve accurate height control. It performs well but not suitable for the real robot because the torque has a striking step. Therefore, the Bayesian optimization for torque planning method(BOTP) is proposed, which can obtain the optimal torque planning without accurate dynamic model and within few iterations. BOTP method can reduce 82.3% height error, 26.9% energy cost with continuous torque curve. This result is validated in the Webots simulation platform. Based on the torque curve obtained in the W-JBD model to narrow the searching space, BOTP can quickly converge (40 times on average). Cooperating W-JBD model and BOTP method, it is possible to achieve the height control of real robots with reasonable times of experiments.
本文主要研究了基于力矩规划和能耗优化的轮式双足机器人的精确跳高控制。由于轮式双足机器人在跳跃过程中存在欠驱动、非线性估计和瞬时冲击等特点,使得其跳跃高度的精确控制十分复杂。现实中,机器人为了保证安全,往往会跳得过高,造成额外的电机损耗、更大的地面反作用力和更多的能量消耗。为了解决这一问题,提出了一种新的轮式双足跳跃动力学模型(W-JBD)来实现精确的高度控制。虽然性能良好,但由于力矩过大,不适合实际机器人使用。为此,提出了基于贝叶斯优化的转矩规划方法(BOTP),该方法无需精确的动力学模型,且迭代次数少,即可获得最优转矩规划。在连续扭矩曲线下,BOTP方法可降低82.3%的高度误差和26.9%的能耗。该结果在Webots仿真平台上得到了验证。基于W-JBD模型得到的扭矩曲线,缩小搜索空间,使BOTP能够快速收敛(平均收敛40次)。将W-JBD模型与BOTP方法相结合,通过合理的实验次数,实现对真实机器人的高度控制。
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引用次数: 3
Homography-Driven Plane Feature Matching and Pose Estimation 平面特征匹配与姿态估计
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536129
Luzhen Ma, Kaiqi Chen, Jialing Liu, Jianhua Zhang
The significance of feature matching is self-evident in the tasks of applying Simultaneous Localization and Mapping (SLAM) technology. However, existing methods mainly focus on nonplanar features and do not deal well with the matching of plane features. To elegantly handle this situation, we introduce a new constraint based on the homography matrix, called symmetric transfer error. The restriction is added to a feature matching model to form a new model named homography-driven classification network(HDCN). The model matches plane features by finding correspondence and eliminating outliers. Because of the particularity of the plane feature, we make an indoor plane dataset to train this model effectively, which consists of a large number of text labels. Through end-to-end training, the inliers ratio and the accuracy of camera pose are greatly improved. Our approach far exceeds other methods of learning and traditional algorithms in the pose estimation task of the indoor environment.
特征匹配在同时定位与制图(SLAM)技术应用中的重要性不言而喻。然而,现有方法主要关注非平面特征,不能很好地处理平面特征的匹配问题。为了优雅地处理这种情况,我们引入了一个基于单应性矩阵的新约束,称为对称传输误差。在特征匹配模型中加入该约束,形成一个新的模型,称为同形图驱动分类网络(HDCN)。该模型通过寻找对应点和消除异常值来匹配平面特征。由于平面特征的特殊性,我们制作了一个包含大量文本标签的室内平面数据集来有效地训练该模型。通过端到端训练,大大提高了内线比和相机姿态的精度。在室内环境的姿态估计任务中,我们的方法远远超过了其他学习方法和传统算法。
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引用次数: 1
Whole-body Spatial Teleoperation Control of a Hexapod Robot in Unstructured Environment 非结构化环境下六足机器人的全身空间遥操作控制
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536197
Junling Fu, Junhao Zhang, Ziyu She, S. E. Ovur, Wenjie Li, Wen Qi, Hang Su, G. Ferrigno, E. De Momi
Considering the lack of autonomy and the uncertainties of the external environment, manipulating robots in an unstructured environment remains a critical issue. By combining human intelligence, teleoperation control has been considered as a significant solution for enhancing the manipulation capability. In this paper, the whole-body spatial teleoperation control strategy of a hexapod robot in an unstructured environment is investigated. Firstly, the forward and inverse kinematics modeling of the hexapod robot leg is analyzed. In addition, three gaits planning, namely straight, swivel, and transverse gaits, are implemented based on the tripod method. Then, a teleoperation control scheme is developed, by integrating variable motion mapping, incremental motion control strategy, as well as visual and haptic feedback. Finally, preliminary experiments are designed and implemented to verify the feasibility and performance of the developed whole-body spatial teleoperation control strategy.
考虑到机器人缺乏自主性和外部环境的不确定性,在非结构化环境中操纵机器人仍然是一个关键问题。结合人的智能,远程操作控制已被认为是提高操作能力的重要解决方案。研究了非结构化环境下六足机器人的全身空间遥操作控制策略。首先对六足机器人腿的正运动学和逆运动学建模进行了分析。此外,基于三脚架法实现了直线、旋转和横向三种步态规划。然后,结合可变运动映射、增量运动控制策略以及视觉和触觉反馈,提出了一种远程操作控制方案。最后,设计并实施了初步实验,验证了所开发的全身空间遥操作控制策略的可行性和性能。
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引用次数: 3
MRI-Compatible Hydraulic Drive Needle Insertion Robot 核磁共振兼容液压驱动插针机器人
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536120
Yufu Qiu, Longfei Wu, Fang Huang, Zhifeng Huang, Q. Yan, Jing Guo
In recent years, the Magnetic Resonance Imaging (MRI) offers high-contrast images of soft tissue to monitor the ablation procedure, an MRI-compatible robotic system aiming to target the lesions with high precision inside the MRI scanner for better intraoperative procedure is necessary. This paper presents an MRI-compatible hydraulic drive needle insertion robot for in-bore MRI-guided minimally invasive stereotactic neurosurgery. According to the principle of communicating vessel, we designed an actuator based on linear pistons and cylinders to drive the robot. A Scotch yoke mechanism is utilized to change the linear motion of the pistons into rotational. To achieve accurate control of the designed robotic system, we utilize grating scales and optical fiber to constitute a MRI-compatible linear encoder. Intensive experimental studies have been performed, the obtained average positional accuracy of the designed robotic system on X-axis, Y-axis, Z-axis, Pitch-axis and Roll-axis is 0.518mm, 1.21mm, 0.898mm, 1.32° and 1.64° respectively.
近年来,磁共振成像(MRI)提供了高对比度的软组织图像来监测消融过程,需要一个MRI兼容的机器人系统,旨在在MRI扫描仪内高精度地定位病变,以更好地进行术中处理。本文介绍了一种mri兼容的液压驱动插针机器人,用于mri引导的微创立体定向神经外科手术。根据通信容器的工作原理,设计了一种基于直线活塞和气缸的执行器来驱动机器人。利用斜轭机构将活塞的直线运动转变为旋转运动。为了实现对设计的机器人系统的精确控制,我们利用光栅尺度和光纤构成了一个mri兼容的线性编码器。通过深入的实验研究,所设计的机器人系统在x轴、y轴、z轴、俯仰轴和滚动轴上的平均位置精度分别为0.518mm、1.21mm、0.898mm、1.32°和1.64°。
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引用次数: 2
Optimal Design of 6-DOF Parallel Manipulator with Workspace Maximization using a Constrained Differential Evolution 基于约束微分进化的六自由度并联机器人工作空间最大化优化设计
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536210
Huayan Pu, Hao Cheng, Jie Ma, Jin Yi, Jinglei Zhao, Zhijiang Xie, Shilong Wang, Tao Zhu, Jun Luo
The applications of parallel robots in various fields are increasing. In this paper, a research on the design optimization of a 6-PSS parallel manipulator for motion simulating is presented. The optimization problem of maximizing the workspace is formulated according to geometric and kinematic analysis. In particular, the workspace is a totally flexible workspace with 6 degrees-of-freedom (DOF). To maximize the workspace of the 6-PSS parallel robot, we investigated the differential evolution algorithm (DE), and the genetic algorithm (GA) is also adopted as a comparison. Computational results show DE algorithm outperforms GA algorithm at about 48.3% in optimal solution providing and 9.3% in time consuming.
并联机器人在各个领域的应用越来越广泛。本文研究了一种用于运动仿真的6-PSS并联机械手的设计优化问题。根据几何分析和运动学分析,提出了工作空间最大化的优化问题。特别地,该工作空间是一个具有6个自由度的完全灵活的工作空间。为了使6-PSS并联机器人的工作空间最大化,研究了差分进化算法(DE)和遗传算法(GA)作为比较。计算结果表明,DE算法在提供最优解方面优于GA算法48.3%,在耗时方面优于GA算法9.3%。
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引用次数: 1
A Novel Tunable Electromagnetic Gravity Compensator with Low Natural Frequency for Precision Assembly 一种用于精密装配的低固有频率电磁重力补偿器
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536136
Qimin Li, Tong Wang, Huayan Pu, Jin Yi, Jie Ma, Ruqing Bai, Jinglei Zhao, Shilong Wang, Jun Luo, Tao Zhu
Precise positioning and vibration isolation are the key technologies in modern precision engineering, such as the precise assembly manipulators and UV lithography, where isolating precision components from the environmental disturbances during positioning is required. In this paper, a novel magnetic levitation gravity compensator employed in a precise assembly system is proposed, which can carry out high-precise positioning in ±5 mm stroke and superior vibration isolation performance attributed to its low levitation stiffness (72.11 N/m) and natural frequency (0.698 Hz). In order to design the gravity compensator with ultra-low stiffness and natural frequency, the analytical model of levitation force is deduced by equivalent surface current model and validated by FEM model. Moreover, a hybrid optimization strategy is utilized to obtain the optimal dimensional parameters of gravity compensator.
精密定位和隔振技术是现代精密工程中的关键技术,如精密装配机械手和UV光刻技术,需要在定位过程中使精密部件不受环境干扰。提出了一种用于精密装配系统的新型磁悬浮重力补偿器,该补偿器的悬浮刚度(72.11 N/m)低,固有频率(0.698 Hz)低,可在±5mm行程内实现高精度定位。为了设计具有超低刚度和固有频率的重力补偿器,采用等效表面电流模型推导了悬浮力解析模型,并用有限元模型进行了验证。此外,采用混合优化策略获得了重力补偿器的最优尺寸参数。
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引用次数: 0
Manipulator Tracking Algorithm Based on Estimated Dynamics and Time-Varying Output Constraint State 基于估计动力学和时变输出约束状态的机械臂跟踪算法
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536170
Wenbin Zha, Xiangrong Xu, Zhaoxing Chen, A. Rodic, P. Petrovic
In order to solve the buffeting problem of 7 DOF Manipulator caused by external disturbance in the motion process, the dynamic equation of the manipulator is given, the estimated inertia matrix is selected, and the RBF neural network fitting characteristics are used to fit the required items to reduce the difficulty of modeling. Based on the estimated dynamic model, a neural network adaptive control method with time-varying constraint state is proposed; The control law is designed, and the Lyapunov function equation and asymmetric term are established to derive its convergence. The angular displacement, angular velocity, angular acceleration, input torque and disturbance fitting are analyzed according to the joint state tracking results of the manipulator by using Simulink and gazebo simulation. The system simulation results show that the chattering phenomenon can be suppressed by using this method in the case of disturbance.
为了解决7自由度机械臂在运动过程中由于外界干扰引起的抖振问题,给出了机械臂的动力学方程,选取了估计的惯性矩阵,利用RBF神经网络拟合特性对所需项进行拟合,降低建模难度。基于估计的动态模型,提出了一种具有时变约束状态的神经网络自适应控制方法;设计了控制律,建立了李雅普诺夫函数方程和非对称项,推导了控制律的收敛性。根据机械手关节状态跟踪结果,利用Simulink和gazebo仿真软件对其角位移、角速度、角加速度、输入力矩和扰动拟合进行分析。系统仿真结果表明,在存在干扰的情况下,该方法可以有效地抑制系统的抖振现象。
{"title":"Manipulator Tracking Algorithm Based on Estimated Dynamics and Time-Varying Output Constraint State","authors":"Wenbin Zha, Xiangrong Xu, Zhaoxing Chen, A. Rodic, P. Petrovic","doi":"10.1109/ICARM52023.2021.9536170","DOIUrl":"https://doi.org/10.1109/ICARM52023.2021.9536170","url":null,"abstract":"In order to solve the buffeting problem of 7 DOF Manipulator caused by external disturbance in the motion process, the dynamic equation of the manipulator is given, the estimated inertia matrix is selected, and the RBF neural network fitting characteristics are used to fit the required items to reduce the difficulty of modeling. Based on the estimated dynamic model, a neural network adaptive control method with time-varying constraint state is proposed; The control law is designed, and the Lyapunov function equation and asymmetric term are established to derive its convergence. The angular displacement, angular velocity, angular acceleration, input torque and disturbance fitting are analyzed according to the joint state tracking results of the manipulator by using Simulink and gazebo simulation. The system simulation results show that the chattering phenomenon can be suppressed by using this method in the case of disturbance.","PeriodicalId":367307,"journal":{"name":"2021 6th IEEE International Conference on Advanced Robotics and Mechatronics (ICARM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125570239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Integrated Design of Functional Electrical Stimulator and Transcutaneous Electrical Nerve Stimulator on a Single Prototype 功能性电刺激器和经皮神经电刺激器在单一原型上的集成设计
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536149
A. Khan, Ke Li, Na Wei
This study proposed a novel system with an integrated design of functional electrical stimulator (FES) and transcutaneous electrical nerve stimulator (TENS) on a single prototype. The novel component of the device involves two modes of operation – the FES and TENS, with controllable frequency, pulse-width, stimulation intensity, and multi-shape pulses on a single device. A boost converter controls the stimulation intensity; an Arduino Uno microcontroller controls the frequency and pulse width; an H-bridge produces square pulses, a toggle switch monitors the mode of operation, and RC filters generate multiple shape pulses. The FES and TENS modes of the device were analyzed with variable parameters and multiple shape pulses. This new design realized a low cost (less than 50 $), low inputs (9 V), and multi-shape stimulation pulses for the FES and TENS, with variable frequency control, controllable pulse-width, and smaller size of the device on a single prototype. This design makes the FES and TENS more practically switched and safer with lower voltage outputs (less than 35 V) than the single-mode stimulators.
本研究提出了一种将功能性电刺激器(FES)和经皮神经电刺激器(TENS)集成在一个原型上的新系统。该设备的新组件包括两种工作模式- FES和TENS,在单个设备上具有可控的频率,脉冲宽度,刺激强度和多形状脉冲。升压变换器控制刺激强度;Arduino Uno微控制器控制频率和脉宽;h桥产生方形脉冲,拨动开关监视操作模式,RC滤波器产生多个形状脉冲。在变参数和多形状脉冲条件下,对器件的FES和TENS模式进行了分析。这种新设计实现了FES和TENS的低成本(不到50美元)、低输入(9 V)和多形状刺激脉冲,具有变频控制、脉冲宽度可控和单个原型上更小的设备尺寸。与单模刺激器相比,该设计使FES和TENS具有更低的电压输出(小于35 V),更实用和更安全。
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引用次数: 0
Improved Proxy-based Sliding Mode Control Integrated Adaptive Dynamic Programming For Pneumatic Muscle Actuators 基于改进代理滑模控制集成自适应动态规划的气动肌肉执行器
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536081
Zengqi Peng, Jian Huang
It is an urgent social problem that the rehabilitation needs of the elderly and the disabled can hardly be satisfied. The human-centered rehabilitation robot is a potential solution. In this paper, an auxiliary control scheme based on adaptive dynamic programming is proposed for a class of pneumatic artificial muscles. The improved proxy-based sliding mode controller is used as the basic controller, and an adaptive dynamic programming controller is used to provide auxiliary control signals. To ensure the reliability of the control strategy, the Lyapunov theorem is used to analyze the stability of the control scheme. The simulation results of the proposed method are compared with those of PID, proxy-based sliding mode control, and adaptive proxy-based sliding mode control without the auxiliary controller. Numerical results verify the effectiveness of the control scheme.
老年人和残疾人的康复需求难以得到满足是一个亟待解决的社会问题。以人为中心的康复机器人是一个潜在的解决方案。针对一类气动人工肌肉,提出了一种基于自适应动态规划的辅助控制方案。采用改进的基于代理的滑模控制器作为基本控制器,采用自适应动态规划控制器提供辅助控制信号。为了保证控制策略的可靠性,利用李雅普诺夫定理对控制方案的稳定性进行了分析。将该方法的仿真结果与PID、基于代理的滑模控制和无辅助控制器的基于自适应代理的滑模控制进行了比较。数值结果验证了该控制方案的有效性。
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引用次数: 1
Multi-functional Smart E-Glasses for Vision-Based Indoor Navigation 基于视觉的室内导航多功能智能电子眼镜
Pub Date : 2021-07-03 DOI: 10.1109/ICARM52023.2021.9536084
Jiaqi Xu, H. Xia, Yueyue Liu, Zhijun Li
Wearable sensing and feedback device could provide useful information for the people with visual impairments. In this paper, we develop a real-time, multifunctional electronic eyeglasses (E-Glasses) for vision-based indoor navigation. Our proposed E-glasses has two main functions, which are indoor navigation through navigation algorithm, and object of interest detection through deep learning technology. The safe motion trajectory and the object information are summarized and feedback will be given to the people with visual impairments. The system can run at 39 fps and achieve mean average precision of 84.77% in the test set of images we collected. Detailed experiments of "Navigation" and "Find the target" had an overall success rate above 91%, demonstrating the feasibility of E-Glasses.
可穿戴式传感和反馈装置可以为视障人士提供有用的信息。在本文中,我们开发了一种实时,多功能的电子眼镜(E-Glasses),用于基于视觉的室内导航。我们提出的电子眼镜主要有两个功能,通过导航算法进行室内导航,通过深度学习技术进行感兴趣对象检测。将安全运动轨迹和目标信息进行汇总并反馈给视障人士。系统运行速度为39 fps,在采集的测试集图像中,平均精度达到84.77%。“导航”和“寻找目标”的详细实验总体成功率在91%以上,证明了E-Glasses的可行性。
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引用次数: 2
期刊
2021 6th IEEE International Conference on Advanced Robotics and Mechatronics (ICARM)
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