Cookies
O website necessita de alguns cookies e outros recursos semelhantes para funcionar. Caso o permita, o INESC TEC irá utilizar cookies para recolher dados sobre as suas visitas, contribuindo, assim, para estatísticas agregadas que permitem melhorar o nosso serviço. Ver mais
Aceitar Rejeitar
  • Menu
Publicações

Publicações por Eduardo Pires

2009

Multi-Objective Particle Swarm Optimization Design of PID Controllers

Autores
de Moura Oliveira, PBD; Solteiro Pires, EJS; Cunha, JB; Vrancic, D;

Publicação
DISTRIBUTED COMPUTING, ARTIFICIAL INTELLIGENCE, BIOINFORMATICS, SOFT COMPUTING, AND AMBIENT ASSISTED LIVING, PT II, PROCEEDINGS

Abstract
A novel variant of a multi-objective particle swarm optimization algorithm is reported. The proposed multi-objective particle swarm optimization algorithm is based on the maximin technique previously proposed for a multi-objective genetic algorithm. The technique is applied to optimize two types of problems: firth to a set of benchmark functions and second to the design of PID controllers regarding the classical design objectives of set-point tracking and output disturbance rejection.

2004

Multi-objective genetic manipulator trajectory planner

Autores
Pires, EJS; Oliveira, PBD; Machado, JAT;

Publicação
APPLICATIONS OF EVOLUTIONARY COMPUTING

Abstract
This paper proposes a multi-objective genetic algorithm to optimize a manipulator trajectory. The planner has several objectives namely the minimization of the space and join arm displacements and the energy required in the trajectory, without colliding with any obstacles in the workspace. Simulations results are presented for robots with two and three degrees of freedom, considering the optimization of two and three objectives.

2011

Particle Swarm Optimization for Gantry Control: A Teaching Experiment

Autores
de Moura Oliveira, PBD; Solteiro Pires, EJS; Cunha, JB;

Publicação
PROGRESS IN ARTIFICIAL INTELLIGENCE

Abstract
The particle swarm optimization algorithm is proposed as a tool to solve the Posicast input command shaping problem. The design technique is addressed, in the context of a simulation teaching experiment, aiming to illustrate second-order system feedforward control. The selected experiment is the well known suspended load or gantry problem, relevant to the crane control. Preliminary simulation results for a quarter-cycle Posicast shaper, designed with the particle swarm algorithm are presented. Illustrating figures extracted from an animation of a gantry example which validate the Posicast design are presented.

2010

Maximin Spreading Algorithm

Autores
Solteiro Pires, EJS; Mendes, L; Lopes, AM; de Moura Oliveira, PBD; Tenreiro Machado, JAT; Vaz, J; Rosario, MJ;

Publicação
2010 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)

Abstract
This paper presents a genetic algorithm to optimize uni-objective problems with an infinite number of optimal solutions. The algorithm uses the maximin concept and epsilon-dominance to promote diversity over the admissible space. The proposed algorithm is tested with two well-known functions. The practical results of the algorithm are in good agreement with the optimal solutions of these functions. Moreover, the proposed optimization method is also applied in two practical real-world engineering optimization problems, namely, in radio frequency circuit design and in kinematic optimization of a parallel robot. In all the cases, the algorithm draws a set of optimal solutions. This means that each problem can be solved in several different ways, all with the same maximum performance.

2009

Road tunnels lighting using genetic algorithms

Autores
Leitao, S; Pires, EJS; De Moura Oliveira, PB;

Publicação
2009 15th International Conference on Intelligent System Applications to Power Systems, ISAP '09

Abstract
This paper presents a tool for automating the design of road tunnels lighting systems. The tunnel lighting system must guarantee some minimal luminance values in order to ensure a easy driving and visual perception. The lights distribution, in different tunnel zones, is obtained in the proposed technique by using a genetic algorithm. The developed software framework automatically selects the best light type and its localization, according to a specified design objective, along the tunnel independently of the light manufacturer. © 2009 IEEE.

2010

Particle swarm optimization with fractional-order velocity

Autores
Pires, EJS; Machado, JAT; Oliveira, PBD; Cunha, JB; Mendes, L;

Publicação
NONLINEAR DYNAMICS

Abstract
This paper proposes a novel method for controlling the convergence rate of a particle swarm optimization algorithm using fractional calculus (FC) concepts. The optimization is tested for several well-known functions and the relationship between the fractional order velocity and the convergence of the algorithm is observed. The FC demonstrates a potential for interpreting evolution of the algorithm and to control its convergence.

  • 16
  • 20