55 documents found, page 1 of 6
Sistema de Iluminação Inteligente com Arduíno
Silvestre, Daniel; Oliveira, Hélder; Rebelo, Rúben; Finuras, LuísO trabalho propõe um sistema de iluminação inteligente baseado em Arduíno. O objetivo é ajustar a intensidade da iluminação artificial com base na luz natural medida por um photoresistor, detetar altas temperaturas e humidade por meio de sensores e enviar sinais de alerta. O sistema é controlado remotamente por meio de uma aplicação móvel com conexão Bluetooth. A arquitetura do protótipo consiste em diversos co...
Notas de Automação e Controlo II 2019-2020
Silvestre, DanielDiagrama de Bode Sistemas de 1ª e 2ª Ordem e as respectivas respostas no tempo foram caracterizadas em função dos polos, zeros e ganho estatico da função de transferência. Este ganho assume este nome por ser o valor de amplificação que o sistema exerce sobre sinais constantes, isto ´e de frequência zero. Para ter uma descrição mais pormenorizada do impacto da função de transferência em sinais sinusoidais, ´e ne...
Resilient Desynchronization using Nesterov Method
Silvestre, DanielWireless Sensor Networks (WSNs) - a network composed of nodes using a wireless medium in Time Division Multiple Access (TDMA). No centralized infrastructure - implies the need for a decentralized algorithm to perform desynchronization of transmissions. Applicable to surveillance - a group of vigilant robots that want to periodically visit sites to be monitored.
A general discrete-time method to achieve resilience in consensus algorithms
Ramos, Guilherme; Silvestre, Daniel; Silvestre, CarlosIn this paper, we approach the problem of a set of network agents reaching resilient consensus in the presence of a subset of attacked nodes. We devise a generalized method, with polynomial time complexity, which receives as input a discrete-time, synchronous-communication consensus algorithm, a dynamic network of agents, and the maximum number of attacked nodes. The distributed algorithm enables each normal no...
Presentation of "Analysis for Linear Systems based on Reachability Sets"
Silvestre, Daniel; Rosa, Paulo; Hespanha, João; Silvestre, CarlosThe problem of deciding which inputs in a model influence the most the state or output is often of practical importance, especially in the cases in which the system can be over-parameterized. In this context, a designer is required to perform sensitivity analyses so as to select which inputs are the most relevant to the problem at hand and remove those with smaller or no impact. In this paper, we tackle this is...
Presentation about Desynchronization in Distributed MAC
Silvestre, DanielIn this presentation, we discuss the use of Gauss Seidel iterations to achieve faster desynchronization in MAC access in its distributed setting.
Presentation of "Sensitivity Analysis for Linear Systems based on Reachability ...
Silvestre, DanielOver-parameterized models - a complex systems can have simpler models if possible to measure their effect on the state or output. Multi-agent systems - there are local dynamics coupled by a network and identifying nodes with the most impact is cumbersome. Worst-case effect - proposed solution should look at bad trajectories.
Rendezvous Algorithm for Disconnected Topologies
Silvestre, DanielMulti-Agent Systems (MAS) - a network composed of mobile agents with the objective of converging to a single location. No centralized infrastructure - implies the need for a decentralized algorithm to compute the actuation. Applicable to exploration missions - a group of robots with the target of sensing as much ground as possible. Typical solutions use consensus algorithms [1] [2], can cope with asymmetric wir...
Presentation of "Desynchronization for Decentralized Medium Access Control base...
Silvestre, DanielWireless Sensor Networks (WSNs) - a network composed of nodes using a wireless medium in Time Division Multiple Access (TDMA). No centralized infrastructure - implies the need for a decentralized algorithm to perform desynchronization of transmission. Applicable to surveillance - a group of vigilant robots that want to periodically visit sites to be monitored
Presentation on Set-membership techniques applied to Sensitivity Analysis
Silvestre, DanielIn this presentation, it is described the work leading to the proposal of set-membership techniques to the study of sensitivity analysis.