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Publications

Publications by CTM

2008

Sensor and actuator modeling of a realistic wheeled mobile robot simulator

Authors
Goncalves, J; Lima, J; Oliveira, H; Costa, P;

Publication
2008 IEEE INTERNATIONAL CONFERENCE ON EMERGING TECHNOLOGIES AND FACTORY AUTOMATION, PROCEEDINGS

Abstract
This paper describes the sensor and actuator modeling of a realistic wheeled mobile robot simulator The motivation of developing such simulator is to produce a personalized versatile tool that allows production and validation of robot software reducing considerably the development time. The mobile robot simulator was developed in Object Pascal with its dynamics based on the ODE (Open Dynamics Engine), allowing to develop robot software for a three wheel omnidirectional robot equipped with Infra-Red distance sensors and brushless motors.

2008

Sensor and actuator modeling of a realistic wheeled mobile robot simulator

Authors
Gonçalves, J; Lima, J; Oliveira, HP; Costa, PG;

Publication
Proceedings of 13th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2008, September 15-18, 2008, Hamburg, Germany

Abstract

2008

Dynamical models for omni-directional robots with 3 and 4 wheels

Authors
Oliveira, HP; Sousa, AJ; Moreira, AP; Costa, PJ;

Publication
ICINCO 2008: PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON INFORMATICS IN CONTROL, AUTOMATION AND ROBOTICS, VOL RA-1: ROBOTICS AND AUTOMATION, VOL 1

Abstract
Omni-directional robots are becoming more and more common in recent robotic applications. They offer improved ease of maneuverability and effectiveness at the expense of increased complexity. Frequent applications include but are not limited to robotic competitions and service robotics. The goal of this work is to find a precise dynamical model in order to predict the robot behavior. Models were found for two real world omni-directional robot configurations and their parameters estimated using a prototype that can have 3 or 4 wheels. Simulations and experimental runs are presented in order to validate the presented work.

2008

A numerical simulator for VITRUV

Authors
LeBouquin, JB; Herwats, E; Carvalho, MI; Garcia, P; Berger, JP; Absil, O;

Publication
POWER OF OPTICAL/IR INTERFEROMETRY: RECENT SCIENTIFIC RESULTS AND 2ND GENERATION INSTRUMENTATION

Abstract
VITRUVsim is a numerical tool with as much as possible physics included. Inputs are the source parameters (flux, morphology, position...) and outputs are sequences of observed fringes and/or reduced visibilities. VITRUVsim is written in a portable and free language Yorick(4).

2008

Rhythmic analysis for real-time audio effects

Authors
Stark, AM; Davies, MEP; Plumbley, MD;

Publication
International Computer Music Conference, ICMC 2008

Abstract
We outline a set of audio effects that use rhythmic analysis, in particular the extraction of beat and tempo information, to automatically synchronise temporal parameters to the input signal. We demonstrate that this analysis, known as beat-tracking, can be used to create adaptive parameters that adjust themselves according to changes in the properties of the input signal. We present common audio effects such as delay, tremolo and auto-wah augmented in this fashion and discuss their real-time implementation as Audio Unit plug-ins and objects for Max/MSP.

2008

Exploring the effect of rhythmic style classification on automatic tempo estimation

Authors
Davies, MEP; Plumbley, MD;

Publication
European Signal Processing Conference

Abstract
Within ballroom dance music, tempo and rhythmic style are strongly related. In this paper we explore this relationship, by using knowledge of rhythmic style to improve tempo estimation in musical audio signals. We demonstrate how the use of a simple 1-NN classification method, able to determine rhythmic style with 75% accuracy, can lead to an 8% point improvement over existing tempo estimation algorithms with further gains possible through the use of more sophisticated classification techniques.

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