Bremen, Troisdorf. A place on the podium of the "DHL Robotics Challenge 2016" is now safe forthe student team from three faculties of the University of Bremen, Germany, as they were selectedas one of the finalists in the world-acclaimed robotics competition. Their "Last Mile Assistant Robot"(LaMA) convinced the selecting jury. On the 17th November, the team will present its vehicle,which is intended to facilitate the work of the parcel delivery staff, to 180 selected experts at theDHL Innovation Center in Troisdorf near Bonn, Germany. The robot was developed within severalstudent projects at the BIBA – Bremer Institut für Produktion und Logistic at the University of Bremenby 7 students from 6 nations from 4 continents.

For the "Robotics Challenge 2016", a "Prototype of a Self-driving Delivery Cart", a demonstrator ofa self-propelled small transport vehicle should be developed. On the so-called "last mile", as thedelivery to the end customer is called, the vehicle should follow and assist the couriers by autonomouslycarrying their heavy loads. The vehicle must therefore be able to travel in typical urban andrural environments loaded with packages at walking pace. It should be simple to control, robustand weatherproof.

"Our vehicle fulfills already these requirements, yet there is still a lot to be done before the presentation,"says Nils Hoppe, responsible for the mechanics in the "LaMA" team. He studied productionengineering and will complete his master's degree next year. For months, Hoppe and his fellowstudents have been working on the project.

Video film shows application and functionality of "LaMA"

For their application in the innovation competition, the students had to submit a description of thesystem and its functionalities as well as a video summarizing the development. The film was createdby the team member and mathematics student Simon Stock. The two and a half minute videocan be found under the following link: www.youtube.com/watch?v=v6V4kztcS-0. The batteryoperatedtracked vehicle can be simply steered via hand and arm gestures. For example, it movesforward or sideways as required, follows the delivery person, and it can raise the loading area sothat the courier can easily remove the parcels without bending.

Innovative traction concept ensures high flexibility, stability and maneuverability

One of the special features of the vehicle is its innovative traction concept, which ensures extraordinaryflexibility and maneuverability. This is possible through the use of the working principle ofMecanum wheels, which has been transferred here into a tracked vehicle. Supported by the BremenPatent and Exploitation Agency InnoWi, a European patent was already filed for the invention.The original idea for this traction technology comes from Dipl.-Ing. & Pat.-Ing. Claudio Uriarte, whohas already dealt with this topic in several research projects. The BIBA scientist is one of the threesupervisors of the "LaMA" project.

"Mecanum wheels work differently than the wheels of a car. The rollers, which are mountedobliquely on the wheel surface, transfer forces in a 45 degress offset to the wheel axle, in contrastas the 90 degrees in cars. A change in the travelling direction of travel is not performed by thesteering of the wheels, but in this case by an adjustment of the rotational speed of the respectivewheels", explains Uriarte. "They create thus a so-called 'omnidirectional' drive. This means that thevehicle can move in all directions and can change its direction on the spot". This principle transferredto a tracked vehicle as in the case of "LaMA ", provides the unmet maneuverability as wellas maximum mobility and stability even in rough and uneven terrains.

"Successful teaching also needs fun factor"

"This was a very complex task and I am impressed by how the students have mastered it - veryrich in ideas and professionalism. I particularly like the compact design of the robot", says Uriarte.BIBA director Prof. Dr.-Ing. Michael Freitag is pleased with the success of the students. "They reallydid an excellent job. With a great deal of commitment, they have created a functioning system ina relatively short time, which convinced professionals in the industry."

For Freitag, the results of the student project also confirm the teaching of the production engineeringdepartment of the University of Bremen, in which the BIBA is strongly involved. "It is one thingto impart methodological knowledge. A whole other thing is to convey practical experience and tomotivate the students to develop their own initiative and creative work like this one, despite bonedrytheory and school-like studies”, says Freitag. "We must not forget that the academic teachingmust always be application-oriented and should offer a certain fun factor if it wants to be successful."

Decision on "DHL Innovation Day" via live vote

The three finalists of the robotics competition will have the opportunity to present their developmentsat the "DHL Innovation Day" in front of professionals from around the world. In a live voting,the ranks are awarded - and thus prize money between 2,000 and 10,000 euros. In addition, thefirst-placed team will present his idea in the "DHL Innovation Centers" in Troisdorf and Singaporeand will be invited to examine the implementation of the idea together with DHL within the frameworkof a feasibility study.

(Sabine Nollmann)

Further information and contacts:

www.youtube.com/watch?v=v6V4kztcS-0 (application film "LaMA" of students)
www.dhlinnovationchallenge.com/roboticschallenge/ (competition tender)

Prof. Dr.-Ing. Michael Freitag, phone: 0421 218-50 002, e-Mail: fre@biba.uni-bremen.de
Dipl.-Ing. & Pat.-Ing. Claudio Uriarte, phone: 0421 218-50 163, e-mail: uri@biba.uni-bremen.de