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MATLAB Robot Simulator
Adam LodesUniversity of Missouri
December 6th, 2010
Introduction• Code a simulator that can model any robot
• Given the DH parameters, model and animate the robot
• Allows for the user to visualize joints and movements of any robot
• Use Puma3D by Walla Walla Washington as an example simulator
Problem Statement
• The DH parameters are a set of 4 parameters that describe any link of a robot.
• Each robot can be adequately described by the set of DH parameters for each link
• From any DH table, the simulator can construct a model for the robot, and animate each joint.
Approach• Assumption is to model the robot from only the DH
parameters.– No link data available– No end-affecter data available
• Aim is to model any robot, regardless of joint configuration
• Aim is to animate each joint independently
• Build simulator in MATLAB
• Use the Puma3D simulator written by Walla Walla Washington
Coding Order and Approach• GUI management (uicontrol, uitable)– Enter the DH table
• Construct individual links from cylinders and rectangles (patch objects)
• Construct all the links from the entered DH table– Test many different robots
• Animate each link with tester code– Apply to all links independently– Test with many different robots
• Add control GUIs for the animation• Add extra functions (Home, Random Move)• Add an end-affecter • Add GUI support for loading different Robots
Results
• Able to model any DH table• Pre-made DH tables:– Tester– Scara– Example from Class– Puma 560– Puma 260
GUI 0
GUI 1
GUI 2
GUI 3 (The Robot)
Tester Robot
• Random DH table I made up to build the code
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SCARA Robot
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Class Example Robot
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Puma 560
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Puma 260
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Limitations• I built the simulator with MATLAB student version R2009a.
– uitable does not work in 2007 and earlier
• No link data: draw just a cylinder or a box with dimensions based on d and a parameters
• No end-affecter data, made a default
• No base data, made a default
• Scale can be adjusted
• Multiple button presses during an animation usually cause errors
Possible Future Work• Make more compatible with previous MATLAB
versions
• Add on an end affecter ‘trail’ as in Puma3D simulator
• Add on more parameters: range of motion for each joint. (default values for now)
• Stabilize the program for multiple button presses
Conclusion
• Lodes Robot Simulator is an excellent tool to visualize the construction and animation of any robot
• Robots were adequately modeled and animated
