6,060 research outputs found
Design and manufacturing workshop using the design thinking methodology
Comunicació presentada al ICERI 2019 12th annual International Conference of Education, Research and Innovation (Seville, Spain. 11-13 November, 2019).The purpose of this paper is to describe and discuss the experience under the methodology of Design Thinking, using a workshop format. This workshop, which took place on October 18th and 19th, 2018, in the BUC (Biblioteca Urbana del Coneixement) building in Vila-real, was attended by about a hundred students who had been displaced from the EASD in Valencia. The objective was to create an artistic work for the municipality of Vila-real with the students collaboration. Design Thinking methodology was implemented to carry out the artistic work. The ultimate goal was not only to get an idea, it was important to build it. The students were able to follow the manufacturing process in collaboration with the KrionTM company that offered their Solid Surface product, which possibilities in design terms this company is currently exploring. This was done in the following months, as the manufacture required its time
Moduli spaces of parabolic -Higgs bundles
Using the -norm of the Higgs field as a Morse function, we count the
number of connected components of the moduli space of parabolic -Higgs
bundles over a Riemann surface with a finite number of marked points, under
certain genericity conditions on the parabolic structure. This space is
homeomorphic to the moduli space of representations of the fundamental group of
the punctured surface in , with fixed compact holonomy classes around
the marked points. We apply our results to the study of representations of the
fundamental group of elliptic surfaces of general type.Comment: 46 pages, no figures. Corrected typos, added remarks. To appear in
"Quarterly Journal of Mathematics
Taming mismatches in inter-agent distances for the formation-motion control of second-order agents
This paper presents the analysis on the influence of distance mismatches on
the standard gradient-based rigid formation control for second-order agents. It
is shown that, similar to the first-order case as recently discussed in the
literature, these mismatches introduce two undesired group behaviors: a
distorted final shape and a steady-state motion of the group formation. We show
that such undesired behaviors can be eliminated by combining the standard
formation control law with distributed estimators. Finally, we show how the
mismatches can be effectively employed as design parameters in order to control
a combined translational and rotational motion of the formation.Comment: 14 pages, conditionally accepted in Automatic Control, IEEE
Transactions o
Controlling rigid formations of mobile agents under inconsistent measurements
Despite the great success of using gradient-based controllers to stabilize
rigid formations of autonomous agents in the past years, surprising yet
intriguing undesirable collective motions have been reported recently when
inconsistent measurements are used in the agents' local controllers. To make
the existing gradient control robust against such measurement inconsistency, we
exploit local estimators following the well known internal model principle for
robust output regulation control. The new estimator-based gradient control is
still distributed in nature and can be constructed systematically even when the
number of agents in a rigid formation grows. We prove rigorously that the
proposed control is able to guarantee exponential convergence and then
demonstrate through robotic experiments and computer simulations that the
reported inconsistency-induced orbits of collective movements are effectively
eliminated.Comment: 10 page
Distributed scaling control of rigid formations
Recently it has been reported that biased range-measurements among
neighboring agents in the gradient distance-based formation control can lead to
predictable collective motion. In this paper we take advantage of this effect
and by introducing distributed parameters to the prescribed inter-distances we
are able to manipulate the steady-state motion of the formation. This
manipulation is in the form of inducing simultaneously the combination of
constant translational and angular velocities and a controlled scaling of the
rigid formation. While the computation of the distributed parameters for the
translational and angular velocities is based on the well-known graph rigidity
theory, the parameters responsible for the scaling are based on some recent
findings in bearing rigidity theory. We carry out the stability analysis of the
modified gradient system and simulations in order to validate the main result.Comment: 6 pages In proceedings 55th Conference on Decision and Control, year
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