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Method and system for optimizing the layout of a robot work cell

A work cell, robot technology, applied in general control systems, control/regulation systems, instruments, etc., to solve problems such as finding workstations

Inactive Publication Date: 2011-03-30
ABB RES LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is theoretically possible to use the simulated annealing (SA) method to simultaneously optimize the layout in a workcell comprising more than one station, this is practically impossible since the method cannot be used in Find optimal placement of workstations in a reasonable amount of time

Method used

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  • Method and system for optimizing the layout of a robot work cell
  • Method and system for optimizing the layout of a robot work cell
  • Method and system for optimizing the layout of a robot work cell

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Embodiment Construction

[0047] Figure 1a A robot system is shown comprising a robot 1 , a robot controller 2 and an external computer 3 configured to communicate with the robot controller. The robot includes a plurality of robot parts movable relative to each other. The robot parts are in this case the base 5 and the robot arms 6 , 7 . The base 5 of the robot is arranged in a fixed position relative to the ground. A base coordinate system X, Y, Z is defined relative to the base of the robot. The robot is rotatable with respect to the base in a Z-direction of a base coordinate system of the robot. The robot controller is configured to control movement of the robot according to a control program including instructions for moving the robot along a path to complete a series of tasks on a plurality of workstations. The external computer includes a processor such as a central processing unit (CPU), a memory for storing programs and data, a user input device such as a keyboard and a mouse, a communicati...

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Abstract

The present invention relates to a method for optimizing the placement of a plurality of workstations (20a-d) in a workcell including an industrial robot (1 ) programmed to execute a sequence of tasks on the workstations, wherein each task contains a series of robot targets linked as one or several paths to be visited by the robot when executing the task at the workstation. The method comprises the following steps: a) defining a preferred region (36) within the reachable range of the robot, placing the tasks inside or as close as possible to the preferred region using an evaluation criterion and an optimization algorithm, and based thereon assigning to each workstation a position inside or close to the preferred region, b) determining by means of an optimization algorithm a best order of the workstations to be placed relative to the robot with regard to the robot performance and a defined order in which the tasks has to be executed, and based thereon adjusting the positions of the workstations, and c) adjusting the positions (x,y,z,[alpha]) of the workstations by means of an optimization algorithm configured to run the robot program iteratively in order to optimize the placement of the workstations with regard to the robot performance.

Description

technical field [0001] The present invention relates to a method and system for optimizing the placement of a plurality of workstations in a work cell comprising an industrial robot programmed to perform a series of tasks on said workstations. [0002] The present invention relates to the technology of robotic manipulators and automated production applications. The present invention refers to a method and a system for optimizing the layout of a work cell involving one or more tasks and an industrial robot performing these tasks. Background technique [0003] Robots are often placed in work cells to facilitate the automation of complex sequences of actions. The work cell may comprise a number of different workstations and the robot may be programmed to perform different tasks at different workstations. A workstation is a physical location on which a robot can perform work. Examples of workstations are injection molding machines, die casting machines, waste stations for thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25J9/16
CPCG05B2219/32085G05B2219/32301G05B19/41885G05B2219/32015Y02P90/02
Inventor E-D·张L-L·亓S·默菲
Owner ABB RES LTD
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