Fault Detection for Motor Drive Control System of Industrial Robots Using CNN-LSTM-based Observers

The complex working conditions and nonlinear characteristics of the motor drive control system of industrial robots make it difficult to detect faults.In this paper,a deep learning-based observer,which combines the convolutional neural network(CNN)and the long short-term memory network(LSTM),is employed to approximate the nonlinear driving control system.CNN layers are introduced to extract dynamic features of the data,whereas LSTM layers perform time-sequential prediction of the target system.In terms of application,normal samples are fed into the observer to build an offline prediction model for the target system.The trained CNN-LSTM-based observer is then deployed along with the target system to estimate the system outputs.Online fault detection can be realized by analyzing the residuals.Finally,an application of the proposed fault detection method to a brushless DC motor drive system is given to verify the effectiveness of the proposed scheme.Simulation results indicate the impressive fault detection capability of the presented method for driving control systems of industrial robots.

基于RobotStudio的视觉分拣打磨工作站仿真设计

为解决中小型零件混流自动化生产等问题,提出基于RobotStudio的工业机器人视觉分拣打磨工作站的仿真设计方案。根据零件的生产工艺流程,利用UG软件创建视觉分拣打磨工作站的整体布局;通过分析工作站各个模块功能,设计了各模块的结构;利用RobotStudio软件构建了工作站仿真模型。以视觉引导Smart组件和输送链跟踪仿真为例,阐述了ABB工业机器人通过视觉引导获取工件空间位姿的四元数和欧拉角的转换方法,并介绍了视觉拍照、机器人与工业相机通信等动态仿真的设置过程,以及输送链跟踪动态效果的设置方法。为实现工作站全过程仿真,设计了整体工作站逻辑,编制了仿真工作站离线程序,并将仿真工作站同步到实验平台调试验证。该设计可为智能制造生产线的设计、制造及应用提供参考。

基于Robotstudio的工业机器人课程教学设计与实践

阐述工业机器人实训课程教学实践,将Robotstudio软件融入课程教学中,探讨以实例项目驱动的教学内容设计,以虚实结合手段提升课堂教学效果的教学模式,从而实现教学与实践的统一。

基于RobotStudio的机器人码垛工作站仿真与优化研究

工业机器人码垛应用非常普遍,利用ABB工业机器人仿真软件RobotStudio,搭建了一个简单码垛工作站,完成了整个工作站的布局。同时,通过软件中的建模功能和工具创建功能,实现了工业机器人末端执行器的设计。接着,完成了工作站中末端执行器的动态smart组件功能、系统的I/O设置与连接,以及整个工作站的程序设计与分析。最后,在不同机器人TCP运行速度下进行工作站仿真,将运行时间、速度运行轨迹和机器人能耗进行对比分析,从而选择较优的TCP运行速度。该仿真设计,能有效地为实际码垛工作站的优化提供有效参考和理论依据,从而减少调试时间和研究成本。

Vibration Diagnosis and Optimization of Industrial Robot Based on TPA and EMD Methods

This paper proposedmethod that combined transmission path analysis(TPA)and empirical mode decomposition(EMD)envelope analysis to solve the vibration problemof an industrial robot.Firstly,the deconvolution filter timedomain TPA method is proposed to trace the source along with the time variation.Secondly,the TPA method positioned themain source of robotic vibration under typically different working conditions.Thirdly,independent vibration testing of the Rotate Vector(RV)reducer is conducted under different loads and speeds,which are key components of an industrial robot.The method of EMD and Hilbert envelope was used to extract the fault feature of the RV reducer.Finally,the structural problems of the RV reducer were summarized.The vibration performance of industrial robots was improved through the RV reducer optimization.From the whole industrial robot to the local RV Reducer and then to the internal microstructure of the reducer,the source of defect information is traced accurately.Experimental results showed that the TPA and EMD hybrid methods were more accurate and efficient than traditional time-frequency analysis methods to solve industrial robot vibration problems.

基于RobotStudio的舞台灯旋转控制步进电机组装配工作站仿真设计

以舞台灯旋转控制步进电机组装配为研究对象,介绍了一种利用Robot Studio软件仿真的电机组虚拟装配仿真解决方案。首先使用UG软件进行工作站所需部件三维模型,并导入到Robot Studio软件中进行工作站布局;其次,通过Robot Studio软件将多功能工具和电动螺丝刀创建为机械装置,配置机器人I/O信号,创建上料、快换器、气动夹爪、吸盘、装配等Smart组件,设计工作站逻辑;之后,规划机器人运动路径、示教机器人目标点,编写机器人离线程序;最后通过仿真调试及信号分析,确定合理的机器人运行参数,优化生产节拍和能耗。该方案可以指导实际装配工作站的设计。

基于RobotStudio的码垛工作站物料输送链的设计与仿真

码垛是工业机器人技术的典型应用之一。码垛工作站的输送链是机器人课程实训教学的一个重难点。在实训教学环节中,往往会因为机器人数量不足等因素给实训教学带来一定的困扰。本文根据实际教学需要,建立了工业机器人码垛工作站;创建了传送带的Smart组件;设定了机器人与传送带的工作站逻辑;实现了传送带的动态效果仿真。利用Smart组件对码垛工作站的传送带做动态仿真,有助于学生进一步理解码垛工作站的工作原理,可以缓解因实训设备不足等因素带来的影响。

An Overview of Calibration Technology of Industrial Robots

With the continuous improvement of automation,industrial robots have become an indispensable part of automated production lines.They widely used in a number of industrial production activities,such as spraying,welding,handling,etc.,and have a great role in these sectors.Recently,the robotic technology is developing towards high precision,high intelligence.Robot calibration technology has a great significance to improve the accuracy of robot.However,it has much work to be done in the identification of robot parameters.The parameter identification work of existing serial and parallel robots is introduced.On the one hand,it summarizes the methods for parameter calibration and discusses their advantages and disadvantages.On the other hand,the application of parameter identification is introduced.This overview has a great reference value for robot manufacturers to choose proper identification method,points further research areas for researchers.Finally,this paper analyzes the existing problems in robot calibration,which may be worth researching in the future.

Variable Stiffness Identification and Configuration Optimization of Industrial Robots for Machining Tasks

Industrial robots are increasingly being used in machining tasks because of their high flexibility and intelligence.However,the low structural stiffness of a robot significantly affects its positional accuracy and the machining quality of its operation equipment.Studying robot stiffness characteristics and optimization methods is an effective method of improving the stiffness performance of a robot.Accordingly,aiming at the poor accuracy of stiffness modeling caused by approximating the stiffness of each joint as a constant,a variable stiffness identification method is proposed based on space gridding.Subsequently,a task-oriented axial stiffness evaluation index is proposed to quantitatively assess the stiffness performance in the machining direction.In addition,by analyzing the redundant kinematic characteristics of the robot machining system,a configuration optimization method is further developed to maximize the index.For numerous points or trajectory-processing tasks,a configuration smoothing strategy is proposed to rapidly acquire optimized configurations.Finally,experiments on a KR500 robot were conducted to verify the feasibility and validity of the proposed stiffness identification and configuration optimization methods.

Real-time accurate hand path tracking and joint trajectory planning for industrial robots(Ⅰ)

Previously, researchers raised the accuracy for a robot′s hand to track a specified path in Car-tesian space mainly through increasing the number of knots on the path and the number of the path′s segments, which results in the heavier online computational burden for the robot controller. Aiming at overcoming this drawback, the authors propose a new kind of real-time accurate hand path tracking and joint trajectory planning method. Through selecting some extra knots on the specified hand path by a certain rule and introducing a sinusoidal function to the joint displacement equation of each segment, this method can greatly raise the path tracking accuracy of robot′s hand and does not change the number of the path′s segments. It also does not increase markedly the computational burden of robot controller. The result of simulation indicates that this method is very effective, and has important value in increasing the application of industrial robots.

Real-time accurate hand path tracking and joint trajectory planning for industrial robots(Ⅱ)

Previously, researchers raised the accuracy for a robot′s hand to track a specified path in Cartesian space mainly through increasing the number of knots on the path and the segments of the path. But, this method resulted in the heavier on line computational burden for the robot controller. In this paper, aiming at this drawback, the authors propose a new kind of real time accurate hand path tracking and joint trajectory planning method for robots. Through selecting some extra knots on the specified hand path by a certain rule, which enables the number of knots on each segment to increase from two to four, and through introducing a sinusoidal function and a cosinoidal function to the joint displacement equation of each segment, this method can raise the path tracking accuracy of robot′s hand greatly but does not increase the computational burden of robot controller markedly.

Application of Industrial Robots in Stamping Automation Production Line

Since the reform and opening up, China's economy has developed rapidly and the society has been continuously improving. At the same time, in order to facilitate people's travel, the automobile industry has emerged, which has brought great convenience to people's production and life, and has also promoted the progress of society. In recent years, au-tomation technology has been continuously researched and developed by people, and it has been widely used in people's production and life. In order to improve the efficiency and modernization level of the automobile industry, the paper studies the application of industrial robots in the stamping automation production line, hoping to adapt to the new trend of economic development.

Application of the Morphological Analysis for the Synthesis Arrangements of Industrial Robots with Parallel Structure Mechanisms

The main features of morphological model of industrial robots are discussed, such as support system, manipulator and gripping device. These features are presented with the alternatives for their realization as separate modules. The examples of synthesis of arrangements of industrial robots are resulted on module principle with writing of their morphological formulas.

Mobile Industrial Robots宣布与佛吉亚展开战略合作,助其优化全球内部物流

2019年1月16日:自主移动机器人行业的先行者Mobile Industrial Robots(MiR)宣布与全球领先的汽车技术公司佛吉亚(Faurecia)展开全球战略合作,为佛吉亚全球制造工厂部署自主移动机器人,助其将整个企业的自动化水平提升到一个全新高度。多年来,佛吉亚一直在研究和测试不同的自动化内部运输解决方案,以优化生产力和内部工作流程,进而提升竞争优势。

基于RobotStudio的工业机器人装配工作站仿真设计

随着“中国制造2025”强国战略的广泛开展与深入实施,制造业也正在经历从传统机械制造向数字化、智能化、网络化方向的转型,对生产效率和自动化程度提出了更高要求,机器换人成为必然趋势。本文利用RobotStudio软件对工业机器人装配工作站进行平台搭建,利用虚拟仿真技术对真实生产现场进行仿真模拟,并对工作站优缺点、解决方案以及未来发展方向进行讨论,为制造企业转型升级提供一定的理论依据和参考价值。

基于RobotStudio的搬运码垛机器人仿真工作站设计与研究

本文以工业机器人搬运码垛工作站为研究对象,利用RobotStudio仿真软件设计一个搬运码垛机器人仿真工作站。首先用仿真软件RobotStudio进行工作环境的搭建;其次通过Smart组件设计,模拟生产线传送带依次出现产品的效果,通过创建机器人I/O信号及工作站逻辑设计,使吸盘工具可以搬运产品到达指定位置;最后,编写机器人搬运码垛仿真程序,使搬运码垛机器人仿真工作站的功能得以实现。

Technology Foresight Research of Industrial Robot Based on Patent Analysis

In view of the lack of patent big data in research on technology foresight in the industrial robot field, this paper introduces an improved method based on patent mining and knowledge map. Firstly, SAO structure is extracted from selected patents, secondly, the similarity between patents is calculated based on extracted SAO structure, thirdly, patent network and patent map are drawn based on calculated patent similarity matrix, technology evolution process and future trends of industrial robot are summarized from patent network, and future potential technology opportunities are predicted based on technological vacancies identified from patent map. Finally, this paper identifies six key technical areas and four potential technical opportunities in the field of the industrial robot.

基于RobotStudio与PLCSIM的联合虚拟仿真平台研究

针对复杂的工业现场环境中工业机器人在配合其他控制设备应用时必须在线调试的弊端,使用联合虚拟仿真技术,在RobotStudio中建立实际生产环境的仿真模型并对机器人离线编程,使用博图软件编写程序下载至虚拟PLC中,通过虚拟以太网建立连接,进一步还原生产控制方式。该方案脱离实际设备,为工业机器人与PLC项目的开发提供实验平台,使机器人编程调试环境更加安全灵活,在教学中也可弥补教学设备的不足。

Digital twin-and extended reality-based telepresence for collaborative robot programming in the 6G perspective

In the context of Industry 4.0,a paradigm shift from traditional industrial manipulators to Collaborative Robots(CRs)is ongoing,with the latter serving ever more closely humans as auxiliary tools in many production processes.In this scenario,continuous technological advancements offer new opportunities for further innovating robotics and other areas of next-generation industry.For example,6G could play a prominent role due to its human-centric view of the industrial domains.In particular,its expected dependability features will pave the way for new applications exploiting highly effective Digital Twin(DT)-and eXtended Reality(XR)-based telepresence.In this work,a novel application for the above technologies allowing two distant users to collaborate in the programming of a CR is proposed.The approach encompasses demanding data flows(e.g.,point cloud-based streaming of collaborating users and robotic environment),with network latency and bandwidth constraints.Results obtained by analyzing this approach from the viewpoint of network requirements in a setup designed to emulate 6G connectivity indicate that the expected performance of forthcoming mobile networks will make it fully feasible in principle.

Optimization of Serial Port of General Flex Pendant for Industrial Robot

In order to further improve the serial ports communication mode of the general Flex Pendant for industrial robot,a multiple serial communication mode is put forward. It is used to meet the stability of data transmission,transmission distance,transmission speed,anti-interference and cost-effective. Using ADUM1201 single direction dual channel digital isolator,two pieces of MAX13487 E and a piece of MAX3232 chip to transmit data and files, and to control chip’ s electrical level. Selecting the RS232, RS422 and RS485 communication mode,the serial ports of the general Flex Pendant of industrial robot is optimized.