University of Southern Denmark
- Offer Profile
- FroboMind is an open-source
robot control system software platform designed for field robotics research
by many universities, companies, groups and researchers at the University of
Southern Denmark. It uses the same generic platform across different
projects to maximize reuse of existing work.
- FroboMind is a robot control system software platform
designed for field robotics research. It provides the means of using the
same generic platform across different projects, field robots and implements
and hereby maximizing reuse of existing work. FroboMind is open-source and
permits royalty free commercial use of the work. It is implemented in ROS
and runs on Ubuntu Linux.
What is FroboMind
- The aim of FroboMind is to standardize robot software development across
projects, robots and implements and optimize the robot software in terms of:
Modularity and code reuse in order to decrease time spent on software
development, debugging and testing.
- Extensibility and scalability, It must accommodate implementations
from small student projects to advanced research project.
The FroboMind software platform consists of an operating system, a middleware and an architecture that defines the organization of software components into layers and modules with well defined interfaces.
FroboMind supports the latest Ubuntu Long Term Support (LTS) release.
FroboMind has been implemented in ROS (Robot Operating System).
The FroboMind architecture is based on an intuitive decomposition of the
perception, decision making and action tasks of a field robot
- The FroboMind architecture is based on an intuitive
decomposition of the perception, decision making and action tasks of a field
The robot perceives the surrounding environment through its sensors and
feedback from the robot and implement systems. It combines the perception
with shared and a priori knowledge. Based on this accumulated knowledge, the
robot mission description and user interaction, the robot selects a
behaviour that seek to optimize the fulfillment of the mission task. The
behavioural actions are then executed with respect to time and state.
Data flow is illustrated by connecting arrows. An arrow tip next to a module
indicates that the data is used as input while the lack of an arrow tip
indicates that data is outputted from the module. In order not to clutter
the overview it is assumed that any component has access to data accessible
by it’s predecessor, and therefore multiple connections to successors are
shown only when relevant to the understanding of the architecture. Data
available for all components have not been included in the overview.
Internal fault diagnosis, system watchdog and incident handling tasks are
organized as a separate Safety layer to ensure maximum simplicity and
clarity in these modules and hence minimize potential software errors, which
in turn ensures a high level of reliability. The safety layer serves to
improve the robustness of the robot autonomy by facilitating behavioural
responses to internal and external incidents. The safety layer is capable of
activating but not deactivating or inhibit activation of the hardware
emergency stop circuit.
Modules represented by a grey rectangle are included to fully describe the
functionality. They do not represent actual code.
- Frobit is a small differential steered robot designed
for rapid prototyping of applications as well as curricular activities
within field robotics. The idea behind the design is to have a small,
low-cost and easy to build open source robot platform for developing
software components for the FroboMind architecture. The Frobit is
differential steered with a passive castor wheel. It currently exists in two
- A small and very low-cost Frobit for indoor use only (documented here)
A larger more durable FrobitPro which is suitable for both indoor and
outdoor use (documented here)
The Frobit is used as reference platform for FroboMind meaning that
FroboMind contains updated demo examples for the Frobit that works.
Below is a video showing the frobit demo example for waypoint navigation
using wheel encoders and a gyro for relative pose estimation.
- Armadillo was developed by the University of Southern
Denmark and Aarhus University in 2011. It is a tracked toolcarrier featuring
the FroboMind architecture implemented in Robot Operating System ROS.org and
a high degree of modularization.
The Armadillo is currently being utilized in two projects within precision
navigation in row crops and humanitarian demining. For more informaton
please visit the Projects page.
The Armadillo platform consists of two independent track modules and an
exchangeable tool carrier module in between. Removing a track module from
the tool carrier module requires only removal of 8 bolts and disconnecting
the power and communication cables, a process which takes a few minutes.
Armadillo has electrical propulsion allowing different power sources such as
battery packs, generators and future sustainable energy sources like fuel
Each of the Armadillo track modules can be regarded as self contained
propulsion modules, with on-board electric motor, motor controller and
gearbox. This gives rise to a flexible vehicle platform where track modules,
and the supporting hardware such as battery packs and robot computer, can be
mounted in different configurations favouring e.g. weight distribution or
other requirements of the implement that must be carried.
The track module is powered by a 3.5kW brushless DC motor. With a 1/25 gear
ratio, which gives a top speed of 7.4 km/h and an expected 25% loss in the
powertrain, one track module can deliver 1kN continous thrust and up to
1.7kN thrust in 30 second bursts.
Currently the Armadillo carries two exchangable 48V 100Ah battery weighing
150kg each. The battery packs are based on deep-cycle lead-acid batteries
supporting a 50% discharge. This gives the Armadillo 40 minutes of worst
case operating time at maximum continous power. In normal operating
conditions, where a vehicle with two track modules have to overcome a
dynamic friction of 500N, an effective operating time of 2.6 hours can be
expected. With additional battery packs ready and charged, the vehicle can
be operational as long as desired. Each battery pack can be recharged in 4.5
hours. More advanced and expensive battery technologies, such as
Lithium-ion, will improve performance in terms of weight and operating time
- ASuBot is an acronym for Aarhus and Southern Denmark
University Robot, a joint project between the faculty of engineering at
Aarhus University and the faculty of engineering at the University of
ASuBot is based upon a Massey Fergusson 38-15 garden tractor retrofitted
with a Topcon AES-25 steering system. The ASuBot robotics computer FroboBox
features the FroboMind architecture implemented in Robot Operating System
ASuBot has been utilized in a research project focusing on weeding in
organic orchards. Today this is a quite tedious process as herbicides are
not allowed and weeding are therefore typically carried out using either a
mechanical process or weed burning. Weed at a closer distance than half a
meter to the fruit trees compete about the nutrients, therefore the amount
of weed within that distance needs to be kept at a very low level. Under
normal circumstances weeding has to take place every week.
In the research project we focused on organic weeding using a gass burner
and an autonomous garden tractor. The tractor navigates autonomously through
the entire orchard ensuring that the gas burners are not damaging the trees.
Navigation is accomplished without a GNSS because of problems with the trees
shading the GNSS antenna sometimes. Since RTK-GNSS receivers are still quite
expensive this also lowers the price of the robot.
ASuBot is based upon a Massey Fergusson 38-15 garden tractor retrofitted
with a Topcon AES-25 steering system.
- FroboMower is a small mower platform based on a
commercial low-cost robotic mower. The purpose of FroboMower is to perform
field experiments related to grass cutting and precision weeding as well as
related topics like area coverage, state estimation based on low-cost
sensors, robust autonomous behaviour etc. FroboMower is currently
operational and is being used in various projects.
The original electronics has been replaced by a RoboCard running the Frobit
firmware and FroboMower is thus fully supported by FroboMind just like the
Frobit robot. The RoboCard controls the propulsion motors through a H-bridge
motor controller, and low-cost optical rotary encoders have been installed
on the wheel shafts to provide odometry feedback. The three cutter motors
are controlled by the RoboCard as well. An Inertial Measurement Unit (IMU),
a mast for a GNSS antenna and a laptop platform have been installed to
support the experimental work.
- FroboScout is a small differentially steered field
robot designed for various scouting tasks as well as test platform for field
robot software. FroboScout is based on the following design goals:
- Keep it simple
Reasonable off road performance
In a current project it is used for surveying tasks that are part of the
quality assurance when constructing new roads. It navigates a specified
route and at predetermined measuring locations it waits a defined number of
seconds while the surveying station performs a precise relative measurement
to the optical prism installed below the GNSS antenna.
The construction of FroboScout began back in 2005. It was originally named
CetusBot and used the Field Robotics Embedded Computer (FiRECom). It has
been updated to support FroboMind.
- GrassBots is a current project (2013-2015) concerning
grassland harvesting operations of lowlands for bio gas and bio refinery
plants. This page focuses on utilizing FroboMind for some of the robot
platforms developed during the project.
- Cutting width: 3 m
Weight: 2.200 kg (Lynex carrier) plus 800 kg (Kongskilde grass cutter).
Propulsion: Hydraulic driven tracks.
Power source: 100 hp diesel engine.
Robot computer: Conpleks Robotech 501 Controller.
Navigation sensors: Sick rotary encoders, VectorNav VN-100 IMU, Trimble
Robot software: FroboMind Software Platform
- Back in 1999 the Technical University of Denmark built
12 Small Mobile Robot (SMR) platforms for the purpose of teaching and
supporting thesis-based research. Due to continuous maintenance and
upgrading these robots are still going strong and are used extensively by
the department of Automation and Control, DTU Electrical Engineering. They
run the Mobotware software.
Mobotware is a plug-in based software framework developed at Automation and
Control, DTU Electrical Engineering, Technical University of Denmark. The
software is used for education and research in mobile robotics and has been
ported to different hardware platforms and applications. Important design
criteria have been real-time performance of the control level, easy
integration of sensors, fast porting to new robots and core system stability
and maintainability in an undisciplined programming environment. Mobotware
provides a simple scripting robot control language which also supports use
Mobotware components have been added to FroboMind to include support for the
SMR. The advantage of this is that it allows use of FroboMind and ROS
packages while still benefiting from the Mobotware superior real-time
- This lists robots that are based on a Field Robotics
Embedded Computer (FiRECom), the predecessor to FroboMind.
- Casmobot was developed by the University of Southern
Denmark during 2007-2009 as part of Plant Nursing Robotics, a technology
transfer project. Casmobot is an acronym for Computer Assisted Slope Mowing
Robot. The Casmobot vision was to design and develop an application module
for slope mowers which enables them to perform the mowing semi-autonomously.
Casmobot was based on a Lynex slope mower retrofitted with a Field Robotics
Embedded Computer (FiRECom) the predecessor to FroboMind.
Casmobot was the first of our robot platforms which is remote controlled by
a Nintendo Wiimote. What started out as a funny idea one late friday
afternoon in the robotics lab turned out to be a great demonstrator of user
friendly robot control as the Wiimote seems so much more intuitive than an
industrial standard remote control unit.
- Hortibot was developed at the former Danish Institute
of Agricultural Sciences, now a part of Aarhus University, DK.
Hortibot is a tool carrier capable of traversing a field of row crops
starting at one of the field corners. It follows the row of crops using a
row camera from ECO-DAN (now acquired by Claas Agrosystems) and at the end
of the row it turns using a gyro sensor and drives back along the
neighboring row etc.
Several implements were made for the Hortibot, the most notable being a cell
sprayer prototype. Cameras continuously take pictures of the ground and the
images are analyzed to determine the location of crops and weed within the
image. A row of nozzles placed behind the cameras are then activated so that
only cells (4x10cm) where weed have been detected will be sprayed.
Hortibot was selected as one of The Best Inventions Of The Year 2007 by Time
- Organic weeding using a gass burner and an
autonomous tractor in orchards
- Precision spraying of weed in row crops
- Autonomous weeding of dandelion on turfs and lawns
- Humanitarian demining
- Participation in FieldRobotEvent 2012 (student projects)
- Line marking of football fields
Field Robot Summer Course
- Why waste your summer vacation doing nothing at the
beach, when you can have fun building an autonomous field robot for
sustainable biological production together with fellow students at the
University of Southern Denmark?
- Design & development of field robots for plant nursing
- starts every year in summer (full time study)
- Faculty of Engineering, Odense, University of Southern Denmark
- 7.5 ECTS, individual oral exam, grading according to Danish 7 point scale.
You must be enrolled in an engineering or science study program and passed
the 4th semester in design, mechanics, computer science, physics,
mathematics, etc. The course is free of charge for BSc and MSc students
within DK as part of their curriculum, others will have to pay a course fee.
Please look at the Information and materials page for more information.
Field Robot Summer Course
- You will work in interdisciplinary project groups with
students from design, mechanics, electronics, mechatronics, computer
science, mathematics, physics etc. Each group will build their own field
robot and will have an opportunity to participate in the international