QUICK User manual - K

QUICK User manual - K
V-REP
QUICK User manual
Version 1.4
MAY 2012
Documentation Author
Julien Tharin
K-Team S.A.
Z.I. Plans-Praz
1337 Vallorbe
Switzerland
Email: [email protected]
Url: www.k-team.com
Documentation version
Version
1.0
1.1
1.2
Date
03.06.2010
14.06.2010
16.12.2010
Author
J. Tharin
J. Tharin
J. Tharin
Description
First draft
Updated
Updated floating license dongle; added Khepera 3 Lua parser
1.3
05.07.2011
J. Tharin
Some corrections
1.4
16.05.2012
J. Tharin
Updated license email address, versions for Apple and Linux
Trademark Acknowledgements:
IBM PC: International Business Machines Corp.
Macintosh: Apple Corp.
SUN Sparc-Station: SUN Microsystems Corp.
LabVIEW: National Instruments Corp.
Matlab: MathWorks Corp.
Khepera: K-Team and LAMI
Logitech: Logitech Int. SA
V-REP: Dr. Marc Andreas Freese
LEGAL NOTICE:
•
•
•
The contents of this manual are subject to change without notice.
All efforts have been made to ensure the accuracy of the content of this manual.
However, should any error be detected, please inform K-Team.
The above notwithstanding, K-Team can assume no responsibility for any error in this
manual.
TABLE OF CONTENTS
1.
INTRODUCTION ................................................................................................. 1
1.1
1.2
1.3
1.4
2.
INSTALLATION .................................................................................................. 4
2.1
2.2
2.3
3.
V-REP ........................................................................................................................ 1
SPECIFICATIONS .......................................................................................................... 1
REQUIRED HARDWARE/ SOFTWARE ............................................................................ 3
HOW TO USE THIS HANDBOOK ..................................................................................... 3
THE SINGLE FIXED LICENSE ......................................................................................... 4
THE SINGLE DONGLE LICENSE...................................................................................... 4
THE FLOATING LICENSE ............................................................................................... 4
USAGE ................................................................................................................... 6
3.1
TUTORIAL.................................................................................................................... 6
3.2
LOADING INTEGRATED SCENES.................................................................................... 6
3.3
PROGRAMMING THE KHEPERA III ROBOT .................................................................... 7
3.3.1
On V-REP simulator........................................................................................... 7
3.3.2
Applying Lua script on the real Khepera 3 robot .............................................. 8
1.
INTRODUCTION
1.1
V-REP
Thank you for buying the V-REP software. A powerful 3D robot simulator, which
features several versatile calculation modules (inverse kinematics, Physics/dynamics,
collision detections, minimum distance calculations, path planning, etc.), a distributed
control architecture (unlimited number of control scripts, threaded or non threaded), and
several extension mechanisms (plug-ins, custom client application, etc.).
V-REP is the perfect tool for fast prototyping and verification, remote monitoring, fast
algorithm development, robotics related education, and simulation of factory automation
systems. A V-REP plug-in was specifically developed to allow an intuitive, easy and
realistic Khepera robot simulation.
This document introduces the instructions for the installation and the first steps in VREP. For more information on how to use V-REP, please refer to the help file that ships
with V-REP.
1.2 Specifications
•
Full collision detection module, allowing fast interference checking between any
geometries or collection of geometries, with optional collision contour calculation.
•
Minimum distance calculation module, allowing fast minimum distance
calculation between any geometries (convex, concave, open, closed) or collection
of geometries.
•
Full forward/inverse kinematics calculation module, allowing handling any type of
mechanism (branched, closed, redundant, containing nested loops, etc.)
•
Geometric constraint solver module, allowing to intuitively solve/actuate/interact
with mechanisms
Path planning module, allowing holonomic and non holonomic path planning tasks
•
•
Powerful, customizable and fast dynamics calculation module, allowing to
simulate near to real-world object interactions.
•
Powerful, realistic and exact proximity sensor simulation, fully customizable
•
Simulation of camera-like sensors with image processing capabilities, fully
customizable
•
Simulation of force and torque sensors, with a “breakable” option.
•
Simulation of cutting operations using mill objects
•
Various types of joints (revolute-, prismatic-, screw- or spherical-type)
•
Path or trajectory functionality for elaborate kinematic movements
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•
Script-driven, fully customizable behavior, also at low level.
•
Unlimited number of scripts operating at the same time, non-threaded or threaded
(threaded scripts operate flawlessly also on single-core CPUs).
•
Minimal or no programming required for simple simulations.
•
Support for extension modules (i.e. plugins).
•
Fully customizable client application loop.
•
Fully customizable user interface elements with integrated edit-mode
•
More than 250 clean and fine-grained API functions, available from the C/C++
and Lua side (wrappers can make them available to other languages too)
•
Fully integrated edit mode for robot/mechanism/scene edition (triangle edit mode,
vertex edit mode, edge edit mode, custom user-interface edit mode, path/trajectory
edit mode, etc.) 4 in-parallel running simulator instances sharing a same copy
buffer.
•
Full interactivity during simulation
•
Full copy/paste functionality, not just for objects, but also for their associated
behavior (programs), also during simulation
•
Model self-duplication or self-destruction capability (from within the model itself),
together with associated calculation objects and scripts.
•
Exhaustive and comprehensive documentation
•
Compact scene and model files (one single compressed binary file containing all
what is needed (objects and programs))
•
Powerful data recording, visualization and export functionality
•
Exhaustive CAD-data import and export file-format support (DXF, 3DS, OBJ,
STL)
•
Built-in AVI recorder
•
Powerful and flexible wireless communication simulation and visualization
•
Customized drawing objects (points, lines, triangles, etc.). Allows simulation of
paint, welding seams, etc.
•
Static and dynamic texturing
•
Multi-level undo/redo
•
Objects and attached functionalities are fully scalable (resizable), also during
simulation
•
Simulation speed control also during simulation
•
Compact and lightweight, with no dependency installations required, ideal
candidate for embedding
•
Possibility to lock scenes from further edition/modification, script content viewing
or resource export
•
Free V-REP PLAYER VERSION that allows you to distribute and play created
scenes and models anywhere
•
Very high level of in-house technology development and/or implementation
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1.3 Required Hardware/ Software
•
Required hardware :
o PC, Linux or Apple computer
o Minimal configuration:
CPU: >300 (Passmark CPU Rating)
RAM: >=512 MB
Storage capacity: >50 MB
Video card: >200 (Passmark G3D Rating) (a good video card (i.e.
hardware accelerated) is probably the most critical element of V-REP)
Monitor resolution: >=1024x768
•
Required software :
o OS:
Microsoft Windows Operating Systems: XP with SP3/Vista/Seven
Linux 2.6: Ubuntu, or another distribution
MacOS: from version 10.6
o V-REP setup: “V-REP Vx.y.z Setup.exe”, where x,y,z are the current version
of the software from http://ftp.k-team.com/V-REP/
o optional: floating license type of V-REP: file
“v_repFloatingLicenseServer.exe”
Remark: Please go often check http://ftp.k-team.com/V-REP/ to see if an update is
available, as this software is constantly improving. You won't need to request
any new license for updating.
1.4
How to use this handbook
This handbook introduces the V-REP software and how to start using it. For more
information on how to use V-REP, please refer to the help file that ships with V-REP.
If this handbook does not answer one of the problems you are confronted with, please
consult the K-Team web site (www.k-team.com) and, especially the Forum and the FAQs.
•
Installation:
instruction for installation of the software and licensing.
•
Usage:
quick description of the usage of the V-REP software
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2.
INSTALLATION
There are different versions of license corresponding to different versions of
installations (see: http://www.k-team.com/mobile-robotics-products/v-rep/versions)
Depending of which one you bought, select the corresponding instruction.
2.1 The single fixed license
This license permits the installation of the software on only one computer.
Install from the “V-REP Vx.y.z Setup.exe” file. When you launch the program for the
first time, you have to register the software. It will be then locked to your current
computer as it is a single fixed license. Request and buy a license by sending an email
at [email protected] (with information of the license type, your Hardware ID). Your
Hardware ID (a, Fig 2.1) and a License key (for b ) will be sent back.
Fig 2.1 registration window
2.2 The single dongle license
With this license, you can use the software on multiple computers but only one at a
time.
You will receive by post mail a dongle key and by email the corresponding license
key to the dongle. The dongle has the shape of an USB memory key.
Install the V-REP software from the “V-REP Vx.y.z Setup.exe” file. Then insert your
dongle key into your computer and launch the program. Insert the license key.
2.3 The floating license
This license is suited for a park of computers. You will receive the license server and
the corresponding license keys to a dongle key by email, and by post mail the dongle key.
The dongle has the shape of an USB memory key.
1. Insert your dongle key into your computer.
2. Start the license server “v_repFloatingLicenseServer.exe” on the PC that should act as
the floating license server (fig. 2.2).
V-REP Quick User Manual rev 1.4
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Press ESCAPE to terminate program
2010/6/3 11:21:5 >
####################################################################
####################################################################
Logging started
V-REP floating license server built date is: May 8 2010
V-REP floating license server version: 1.1
PC hardware ID: XXXX- XXXX - XXXX - XXXX - XXXX – XXXX (dongle)
Reading settings...
Using port 20249.
Reading licenses...
1: invalid input.
2: invalid input.
3: invalid input.
4: invalid input.
5: invalid input.
6: invalid input.
ERROR: no valid licenses found.
Leaving here (press a key).
Fig 2.2: floating license server
3.
When you received the license keys, put them in a text file named
“floatingLicenses.txt”, one by line, in the same directory of the license server. Edit
also the “floatingLicenseSettings.txt” file, where the port on which the server listens to
can be set. All text output is automatically saved to a log file
(“floatingLicenseServerLog.txt”). Make sure that Windows allows the server to listen
to that port (Firewall). Then launch the server.
4. On each client PCs that should run V-REP, install V-REP “V-REP Vx.y.z Setup.exe”
file then edit the “V-REP FULL\system\usrset.txt” file. Make sure following values
are added and correct:
a. “floatingLicenseEnabled = true”
b. “floatingLicenseServer = xxx.xxx.xxx.xxx” (specify the IP address of the floating
license server PC)
c. “floatingLicensePort = 20249” (make sure the port number is same as the one
specified on the floating license server PC)
d. “floatingLicenseLight = false” (if false, that PC will search for a V-REP FULL
floating license, otherwise it will search for a V-REP LIGHT floating license)
5. Save the file.
6. Start V-REP. If the floating license server cannot be contacted, or if no appropriate (or
available) floating license could be found, an error message is displayed and V-REP
ends. Otherwise V-REP starts and automatically uses the settings of the floating
license that it received from the server (options, FULL/LIGHT, serial number). Every
4 minutes, V-REP will actualize the license (reserve it for another 8 minutes). If it
failed at actualizing the license, an error message appears every 10-15 seconds.
7. When ending V-REP, V-REP will check-out the license that it borrowed, so that other
PCs can use it. If V-REP crashed (or failed at checking a license out because it could
not connect to the server), then its license will automatically be freed (checked-out)
after 8 minutes.
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3.
Usage
3.1 Tutorial
After having installed and registered the software, you can start using it.
The best way is to start with the tutorials located in the “V-REP User Manual”. You can
access it by the link on your desktop or from the V-REP program: “Help” menu, “Help
Topics” sub-menu, into “V-REP => Contents => “V-Rep” => “Tutorials” => “BubbleRob
tutorial”.
3.2 Loading integrated scenes
You can load created scenes distributed with the software.
In the top Menu under File/Open Scene, choose the file khepera3.ttt in the dialog box.
When you press the "Start/Resume" green button, the simulation will start (Fig. 3.1).
Script access
Simulation start
Fig. 3.1 V-REP with Khepera III and gripper
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3.3 Programming the Khepera III robot
3.3.1 On V-REP simulator
The programming language used in V-REP is LUA. It is a script language. You can
have more information on that language there: http://www.lua.org/docs.html and in the User
manual in the software for specific commands to the simulator.
You can start modifying the script associated with the Khepera III simulation (fig 3.1).
Basically it follows the black line and grasps an object (fig 3.2).
…
maxVel=2*math.pi
while (simGetSimulationState()~=sim_simulation_advancing_abouttostop) do -- while simulation running...
if (simExtK3_getLineSensor(0)>0.75) then
velLeft=maxVel
-- left sensor intensity > 0.75
else
velLeft=maxVel*0.5
-- left sensor intensity <= 0.75
end
if (simExtK3_getLineSensor(1)>0.75) then
velRight=maxVel
-- right sensor intensity > 0.75
else
velRight=maxVel*0.5
-- right sensor intensity <= 0.75
end
simExtK3_setVelocity(velLeft,velRight) -- Set desired left and right motor velocities
if (simExtK3_getGripperProxSensor(0)<0.015)or(simExtK3_getGripperProxSensor(1)<0.015) then
-- Something was detected between the fingers
simExtK3_setGripperGap(0) -- close the fingers
simExtK3_setArmPosition(900) -- move the arm up
end
end
…
Fig. 3.2 V-REP Khepera III main loop
Implemented LUA commands for the Khepera 3:
The following LUA script commands and their parameters for the Khepera 3 robot and
its gripper are described below:
distance = simExtK3_getInfrared(index)
return the distance measure in [m] of the infrared sensor index [0..8]
distance_inMeters=simExtK3_getUltrasonic(index)
return the distance measure in [m] of the ultrasonic sensor index [0..4]
intensity=simExtK3_getLineSensor(index)
return the intensity [0 to 1] of the ground infrared sensor index [0 or 1]
distance =simExtK3_getGripperProxSensor(index)
return the distance in [m] of the gripper sensor index [0 or 1]
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simExtK3_setVelocity(velocity_Left , velocity_Right)
set the velocities of the left and right wheels in [rad/s]
simExtK3_setArmPosition(position)
set position of the gripper's arm; range [300 (down) .. 900 (up)]
simExtK3_setGripperGap(gap)
set aperture position of the gripper; range [0 (closed) .. 170 (open)]
3.3.2 Applying Lua script on the real Khepera 3 robot
With the Lua parser compiled for the robot, you will be able to run on the Khepera 3 robot a
script developed on V-REP.
You will need the following hardware and software:
Hardware:
Software:
-
a Khepera 3 robot mounted with its Korebot II Linux board,
optionally the Khepera 3 gripper
-
KoreConnect converter and serial cable
-
a PC with serial connection or with an USB to serial converter
-
a terminal (Hyperterminal or TeraTerm) for communicating with the
robot through the serial port
-
file kh3luaparser, the Lua parser for Khepera 3: available from:
http://ftp.k-team.com/KheperaIII/V-REP_lua/binaries/
-
file libstdc++6_4.1.2-r10_armv5te.ipk, the C++ library for Korebot
II: available from http://ftp.k-team.com/KheperaIII/VREP_lua/binaries/
-
file liblua-5.1.so, the Lua library: available from http://ftp.kteam.com/KheperaIII/V-REP_lua/binaries/
-
source files of the parser http://ftp.k-team.com/KheperaIII/VREP_lua/sources/kh3LuaParser_VERSION-DATE.tar.bz2 where
_VERSION-DATE is the release version.
-
Lua examples: http://ftp.k-team.com/KheperaIII/VREP_lua/lua_examples/
Follow the instructions below for the Installation and Usage:
Installation:
-
connect the Khepera 3 robot and open the terminal (see Khepera 3 user manual,
chapter “5.2 Testing the secondary serial link”: http://ftp.kteam.com/KheperaIII/UserManual/ )
-
transfer the file libstdc++6_4.1.2-r10_armv5te.ipk to the robot and install it with
the command:
ipkg install libstdc++6_4.1.2-r10_armv5te.ipk
-
transfer the file liblua-5.1.so and move it to the directory /usr/lib:
mv liblua-5.1.so /usr/lib
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-
transfer the file kh3luaparser to the robot
-
change to executable mode the parser with the command:
chmod +x kh3luaparser
-
copy the Lua script from V-REP Khepera 3 robot (fig. 3.2) to a file named
script.lua and transfer this file to the robot
Usage:
-
run the parser with the Lua script file as argument (exit with keys CTRL-C):
./kh3luaparser script.lua
-
you can modify the script with the vi editor, directly on the robot
vi script.lua
The vi commands are:
Key x: delete the letter under the cursor
Key a: enter in edit (append) mode
Key i: enter in edit (insert) mode
Escape key then : : exit mode: write wq! for saving and exiting
write q! for exiting without saving
If you have several consoles connected to the robot via network (see Korebot II user
manual), you can launch the script into one console; and edit it in another one. The parser
program is checking if the script file is modified and saved. It will reload and launch the
newer if it is the case.
Look at the Lua script examples in the subfolder lua_examples in the source files of the
parser or at http://ftp.k-team.com/KheperaIII/V-REP_lua/lua_examples/
Implemented commands for the Lua parser running on the Khepera3 robot:
The common Lua commands can be used. The implemented LUA commands for the
Khepera 3 are described in the chapter 3.3.1 above. And these following specific commands
of the simulator can be used too:
-
simWait(time in [s]) : wait a time in [s], floating point is allowed.
-
simGetSimulationTime(): return the time in [s] since the simulation started.
-
simStopSimulation(): stop the simulation.
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V-REP Quick User Manual rev 1.4
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K-Team S.A.
Z.I. Plans-PRAZ
1337 VALLORBE
Switzerland
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