• 제목/요약/키워드: Multi-Joint Robot

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수직 다관절 사과수확로봇의 매니퓰레이터 개발 (I) -설계.제작- (Development of Manipulator for Vertically Moving Multi-Joint Apple Harvesting Robot(I) -Design.Manusacturing-)

  • 장익주
    • Journal of Biosystems Engineering
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    • 제25권5호
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    • pp.399-408
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    • 2000
  • This study is final focused on developing fruit harvesting robot can distinguish fruit type and status accurately. Multi-joint robot is able to discriminate tree shape and select mature fruit by image processing. The multi-joint robot consists of (a) rotating base, (b)turning first joint-arm, (c)rotating and turning second joint-arm, (d)rotating and turning third joint-arm, (e)rotating and turning last joint and (f)picker hand. The operational ranges of the robot are: horizontal 860~2,220mm, vertical 1,440~2,260mm, 270 degrees’rotation angle, 90 or 270 degrees’turning angle. The robot weighs 330kg. The multi-joint robot was designed in high accuracy and efficiency by getting as close as the movements of human arms and waist.

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Optimizing Movement of A Multi-Joint Robot Arm with Existence of Obstacles Using Multi-Purpose Genetic Algorithm

  • Toyoda, Yoshiaki;Yano, Fumihiko
    • Industrial Engineering and Management Systems
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    • 제3권1호
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    • pp.78-84
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    • 2004
  • To optimize movement of a multi-joint robot arm is known to be a difficult problem, because it is a kind of redundant system. Although the end-effector is set its position by each angle of the joints, the angle of each joint cannot be uniquely determined by the position of the end-effector. There exist the infinite number of different sets of joint angles which represent the same position of the end-effector. This paper describes how to manage the angle of each joint to move its end-effector preferably on an X-Y plane with obstacles in the end-effector’s reachable area, and how to optimize the movement of a multi-joint robot arm, evading obstacles. The definition of “preferable” movement depends upon a purpose of robot operation. First, we divide viewpoints of preference into two, 1) the standpoint of the end-effector, and 2) the standpoint of joints. Then, we define multiple objective functions, and formulate it into a multi-objective programming problem. Finally, we solve it using multi-purpose genetic algorithm, and obtain reasonable results. The method described here is possible to add appropriate objective function if necessary for the purpose.

로봇 착유시스템을 위한 다관절 매니퓰레이터 개발 (Development of a Multi-joint Robot Manipulator for Robot Milking System)

  • 김웅;이대원
    • Journal of Biosystems Engineering
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    • 제30권5호
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    • pp.293-298
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    • 2005
  • The purpose of this study was the development of a multi-joint robot manipulator for milking robot system. The multi-joint robot manipulator was controlled by 5 drivers with driver controller through the position information obtained from the image processing system. The robot manipulator to automatically attach each teat cup to the teats of a milking cow was developed and it's motion was accurately measured with error rate. Results were as follows. 1. Maximum errors in position accuracy were 4mm along X-axis, 4.5mm along Y-axis and 0.9mm along Z-axis. Absolute distance errors were maximum 4.8mm, minimum 2.7mm, and average 3.6mm. 2. Errors of repeatability were maximum 3.0mm along X-axis, 3.0mm along Y-axis, and 0.5mm along Z-axis. Distance error values were maximum 3.2mm, minimum 2.2mm, and average 2.5mm. It is envisaged that multi-joint robot manipulator can be applicate to milking robot system being developed in consideration of the experiment results.

다자유도 수동식 중력보상장치 기반의 6자유도 산업용 로봇 (6 DOF Industrial Robot Based on Multi-DOF Counterbalance Mechanism)

  • 안국현;송재복
    • 로봇학회논문지
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    • 제12권1호
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    • pp.11-18
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    • 2017
  • Static balance of an articulated robot arm at various configurations requires a torque compensating for the gravitational torque of each joint due to the robot mass. Such compensation torque can be provided by a spring-based counterbalance mechanism. However, simple installation of a counterbalance mechanism at each pitch joint does not work because the gravitational torque at each joint is dependent on other joints. In this paper, a 6 DOF industrial robot arm based on the parallelogram for multi-DOF counterbalancing is proposed to cope with this problem. Two passive counterbalance mechanisms are applied to pitch joints, which reduces the required torque at each joint by compensating the gravitational torque. The performance of this mechanism is evaluated experimentally.

자동 착유시스템을 위한 다관절 로봇 머니퓰레이터의 기구학적 분석 (Kinematics Analysis of the Milti-joint Robot Manipulator for an Automatic Milking System)

  • 김웅;이대원
    • 한국축산시설환경학회지
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    • 제13권3호
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    • pp.179-186
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    • 2007
  • The purpose of this study was kinematics analysis of the multi-joint robot manipulator for an automatic milking system. The multi-joint robot manipulator was consisted of one perpendicular link and four revolution links to attach simultaneously four teat cups to four teats of a milking cow. The local coordinates of each joints on the robot manipulator was given for kinematics analysis. The transformation of manipulator was able to be given by kinematics using Denavit-Hatenberg parameters. The value of inverse kinematics which was solved by two geometric solution methods. The kinematics solutions was verified by AutoCAD, MATLAB, simulation program was developed using Visual C++.

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다관절 로봇 제어를 위한 교육용 소프트웨어 연구 (A Study on Education Software for Controling of Multi-Joint Robot)

  • 김재수;손현승;김우열;김영철
    • 정보교육학회논문지
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    • 제12권4호
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    • pp.469-476
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    • 2008
  • 다관절 로봇 교육 효과의 향상을 위해서는 제어 소프트웨어를 통해 로봇의 동작을 쉽게 개발할 수 있어야 한다. 기존의 다관절 로봇 개발기법은 매우 복잡한 구현을 교육해야하지만, 우리의 도구는 로봇의 동작을 쉽게 하여 제어나 움직임에 대한 창의적인 활동을 가능하게 한다. 본 논문에서 교육용 다관절 로봇의 동작 제어를 쉽고 빠르게 프로그램화하기 위해서, 모션 생성 도구를 개발하였다. 우리는 도구를 통해 정확하고 쉽게 프로그램을 교육하고자 한다. 본 논문에서 제안한 모션 생성 도구는 기존의 복잡한 언어 제어 프로그램 방식을 탈피하였을 뿐만 아니라 사용자 편의성 중심이라는 GUI(Graphic User Interface) 방식보다도 쉽게 로봇 제어를 할 수 있었다. 또한 편리한 로봇 동작 구현은 물론 교육적으로 활용되는 마이크로프로세서 실험 장치에서도 적용이 가능하다.

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다기능 다관절 로봇의 설계 및 제어 (Design and Control of a Multi-Function and Multi-Joint Robot)

  • 주진화
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2004년도 추계학술대회
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    • pp.166-169
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    • 2004
  • In this paper show how to design a redundant robot which is suitable for the multiple task without any constraints on the workspace. The implementation is possible by the rigid connection of a mobile robot and a task robot. Use a five joint articulated robot as the task robot; designed the 3 joint mobile robot for this usage. For a task execution assigned to the redundant robot, not only the task robot but the mobile robot should work in the coordinated way. therefore, a kinematic connection of the two robots should be cleary represented in a frame. And, also the dynamic interaction between the two robots needs to be analyzed. Clarified these issues considering the control of the redundant robot. Finally, demonstrate away of utilization of the redundancy as the cooperation between the mobile robot and the task robot to execute a common task.

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A Study on Humanoid Robot Control Method Using Zigbee Wireless Servo Motor with Sensor Network

  • Shin, Dae-Seob;Lee, Hyeong-Cheol
    • 전기전자학회논문지
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    • 제16권3호
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    • pp.235-243
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    • 2012
  • In this study, we developed two legged multi-joint robot by using wireless servo motor that was applied by wireless sensor network technology, which is widely used recently, and performed an experiment of walking method of two legged multi-joint robot. We constructed the star network with servo motors which were used at each joint of two-legged robot. And we designed the robot for operation by transmission of joint control signal from main control system or by transmission of the status of each joint to the main control system, so it operates with continuously checking the status of joints at same time. We developed the humanoid robot by using wireless digital servo motor which is different from existing servo motor control system, and controlled it by transmitting the information of angles and speeds of robot joints to the motor(node) as a feedback through main control system after connecting power and setting up the IDs to each joint. We solved noisy problem generated from wire and wire length to connection point of the control device by construction of the wireless network instead of using existing control method of wiring, and also solved problem of poor real time response to gait motion by controlling the position with continuous transmission of control signals to each joint. And we found that the effective control of robot is able by performing the simulation on walking motion in advance with the developed control algorithm which was downloaded into installed memory. Also we performed the stable walking with two-legged robot by attaching pressure sensor to robot sole. And we examined the robot gait operated by application of calculated algorithm on robot movement to each joint. In this study, we studied the method of controlling robot gait motion by using wireless servo motors and measured the torque applied to each joint, and found that the developed wireless servo motor by ZigBee sensor network offers easier control of two legged robot gait and better circuit configuration of it than the existing wired control system could do.