tailieunhanh - A numeric method to determine workspace of industrial robots

Shape and capacity of robotic workspace are critical information when selecting robot for particular purpose. This paper presents a numeric method to determine workspace of any dumb robot. This method is the consequence of the application of GRG algorithm when transforming the robot kinematic problem into optimization combined with the bisect method. The shape and capacity of robot workspace resulted from the method in 3D format with adjustable accuracy can be chosen. This results can be used in robot designing. | Phạm Thành Long và Đtg Tạp chí KHOA HỌC & CÔNG NGHỆ 139(09): 31 - 36 A NUMERIC METHOD TO DETERMINE WORKSPACE OF INDUSTRIAL ROBOTS Pham Thanh Long*, Le Thi Thu Thuy College of Technology - TNU SUMMARY Shape and capacity of robotic workspace are critical information when selecting robot for particular purpose. This paper presents a numeric method to determine workspace of any dumb robot. This method is the consequence of the application of GRG algorithm when transforming the robot kinematic problem into optimization combined with the bisect method. The shape and capacity of robot workspace resulted from the method in 3D format with adjustable accuracy can be chosen. This results can be used in robot designing. Key words: robot workspace, numeric method,grg algorithm, bisect method, robot designing ROBOT WORKSPACE* Robot workspace is the movement field of the final activator. This is a continuous space with particular shape and capacity. The determination of this space is not so difficult in flat or simple robots. However, in parallel or serial robots with 6 degrees of freedom, the inference is not simple. Workspace can be defined in two ways: - The zone in which the final activator can reach and direct the tool (Type I). - The pure reachable zone (Type II). a. b. Figure by compounding the basic geometric shapes for each joint (a) and workspace in front view 2D (b) Workspace type II always contains workspace type I as the strict requirements of the Type I eliminated a large number of points which are not satisfied the tooling orientation. The description of the two types in detail helps to build boundary conditions to find the shape and size of workspace. In fact, in the catalogsprovided by robot manufacturers,workspace type II is presented in front view and top view without 3D view. In this paper, the determination of both types in 3D view is presented. * Tel: 0947 169291, Email: kalongkc@ 31 Phạm Thành Long và Đtg Tạp chí KHOA HỌC