Virtual Wall with the 3D printed haptic prototype

Our prototype of our version of the 3D printed Stanford’s Hapkit V3.0 is now functional. It uses the same electronics and motor. The pulley sizes are the same, however the big wheel has been redesigned to properly attach and support the capstan cable. The support wall has been optimized and reinforced using dual common ball bearings.

 

A demonstration of the virtual wall implementation is show in the video below.

 

Follow this project at: http://gomezdegabriel.com/projects/haptic-paddle-3d-printed/

 

Fisrt tests of our build of the Hapkit Standford’s haptic device

This is the first test of our build of the Stanford’s Hapkit haptic device built in the School of Engineering of the Universidad de Málaga (Spain) by Juan Gandarias.

This device is intended to be low cost and easy to build, which could make possible teaching haptics, control and telerrobotics all around the world.

In the video, a basic spring model is being tested. Although the motor axis alignment and the friction of the neoprene contact is not perfect,
we are happy with the results.

We used some different components and made some modifications to make it easier to build in Europe. Other changes are coming to make it more robust by using the reprap’s diy experience.

 

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Stay tuned!

Gracias, Juanma!

 

Using Model-Based Development for Teaching Fault Tolerant Systems

I’m using Simulink’s Stateflow as a tool for teaching Faul-Tolerant Systems in the Master of Mechatronics at the University of Málaga.

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Using Stateflow for the developmet of Fault Tolerant Systems

One technique for the fault diagnose of systems is based on the modeling of the system as an Finite State Machine (fms), and all the possible trajectories as an special fsm called “diagnoser”. It is based on different methods and used in the classroom as published here.

In this case we are using this tool with surprisingly good results:

  • No programming needed (just modelling)
  • High level model is created with good implementation separation
  • The student starts building successful simple programs since the first moment
  • Teachers avoid the hassle of always changing IDE’s, versions, and implementation platforms.
  • Thanks to Harel diagrams, Complex systems with high readability can be modeled.
  • Teaching time is reduced.
  • Laboratory time is focused on the problem. Leaving spare time for proper documentation.

It’s not an open source platform, but definitely I’m going to use this tool extensively.

Thanks to my students.

Please, download and cite this work:

Gomez-de-Gabriel, J.M.; Mandow, A.; Fernandez-Lozano, J.; Garcia-Cerezo, A., “Mobile Robot Lab Project to Introduce Engineering Students to Fault Diagnosis in Mechatronic Systems,” Education, IEEE Transactions on , vol.PP, no.99, pp.1,1
doi: 10.1109/TE.2014.2358551
keywords: {Education;Fault tolerance;Mechatronics;Mobile robots;Navigation;Robot sensing systems;Engineering education;LEGO Mindstorms NXT;LabVIEW;fault detection and diagnosis;higher education;mechatronics;mobile robots;project-based learning},
URL: http://ieeexplore.ieee.org/stamp/stamp.jsptp=&arnumber=6914629&isnumber=4358717

Animatronic at the Postgraduate Courses presentation 2015-16

Our animatronic robot made a new appearance after some neck and shoulder surgery.

This was the first Postgraduate Course presentation of the University of Málaga.

We had to refurbish some of the Wall-e’s old joints, but he´s a good nice robot and did his job nicely.

Some work has to be done to improve the robot’s power system and battery charge. Anyone?

Many thanks again to my postgraduate students.

 

More videos of Wall-e in this playlist:

Presented Master Thesis about 6 dof’s Educational Manipulator

Last December, the 10th (2014), José María presented his Master Thesis about an educational 6 Dof’s manipulator programmable under Simulink.

Educational Manipulator Programmable under Simulink

Educational Manipulator Programmable under Simulink

The arm has been designed to be used on the PIERO platform, and built usin Dynamixel servos controlled by and Arduino Mega.

Good work.

Thaks!

Presented Master Thesis about Educational Mobile Robots

On July, the 15th, 2014, J. Gil Lozano presented its Master Thesis about Educational Mobile Robots programmable under Matlab/Simulink. The original title is “Sistema didáctico para programación de robots móviles en Matlab/Simulink”.

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The student participated in the development of the PIERO mobile platform for teaching robotics and mechatronics. He worked with the version 1.0 of the platform and developed lab-work using both the Arduino and the Raspberry PI computing boards.

More details are going to be published at the annual conference of the spanish society of automation.

The report (Project Report) is available, although was written in spanish.

Thanks, Juan!

Presented a Master Thesis about remote environment modelling for off-line robot programming

The student J.C. Camacho presented a work called “3D MODEL DRIVEN DISTANT ASSEMBLY” about remote environment modelling for off-line programming, using computer vision.

He uses structured light and robot parallax to build geometrical models of the objects found. These models are later used to build automatic assembly plans.

Virtual pillars and camera motion are used for  model building.

Virtual pillars and camera motion are used for model building.

This work was developed at the Wise-ShopFloor research group from the Skövde University, wher he worked with J. Cana Quijada, under the tutoring of Abdullah Mohammed.

A remote programming interface was also developped

A remote programming interface was also developped

The project report (3D model driven distant assembly) was written in english and includes an abstract in spanish.

 

Wall-E Animatronic Robot at a Comic Conference

Last weekend Wall-e showed its last capabilities:

– Head-Arm Gesture control.

– Locomotion control.

– Central controller Wireless communication (raspberry pi based).

– LoL (Lots of LiPo’s)

Esteban and Felix had a very hard work to get all this working together.

People enjoyed watching this expressive character.

Among other things to be done are:

– Minor surgery on its left arm.

– A little brain able to link all its sensors with the locomotion and gesture system.

I’m using this platform as a valuable tool for student Master Thesis. They learn a lot and have a good time. So students are wanted to complete the robot.

… and BTW, If you are in the area and interested on a Show. Let us know!

Cheers

 

The PIERO mechanical design available for download

PIERO is a mobile platform for educational purposes. It is modular, layered, open source, arduino controlled and can be programmed under the simulink environment.

If you are interested in the project, visit the PIERO page at: http://gomezdegabriel.com/wordpress/projects/piero-mobile-robot-platform/ and download the latest CAD files in sketchup format.