Publications

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Lemos, J. M., F. Coito, P. Shirley, P. Conceição, F. Garcia, C. Silvestre, and J. Sentieiro. "Long-range adaptive control algorithms for robotics applications." Progress in robotics and intelligent systems. 2 (1996): 134. Abstract
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Ngolo, M., L. B. Palma, F. Coito, L. Gomes, and A. Costa. "Architecture for remote laboratories based on REST web services." E-Learning in Industrial Electronics, 2009. ICELIE'09. 3rd IEEE International Conference on. IEEE, 2009. 30-35. Abstract
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Oliveira, R., H. Pita, F. Coito, and A. Steiger-Garção O projecto OCTOPUS: O módulo Reconhecedor de Zonas Oxidadas–. Vol. 60. Jornadas de Engenharia de Telecomunicações e Computadores-ISEL Lisboa, Portugal, 2002. Abstract
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Ortigueira, M. D., and FJ Coito. "System initial conditions vs derivative initial conditions." Computers & Mathematics with Applications. 59 (2010): 1782-1789. Abstract
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Ortigueira, M., and F. Coito. "The initial conditions of Riemann-Liouville and Caputo derivatives." (2008). Abstract
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Ortigueira, M., and F. Coito. "Revisiting the initial conditions problem in fractional linear systems." (2007). Abstract
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Ortigueira, M., and F. Coito. "Initial Conditions: What Are We Talking About?" (2008). Abstract
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Ortigueira, M. D., and F. Coito. "From Differences to Derivatives." Fractional Calculus and Applied Analysis. 7 (2004): 459. Abstract
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Palma, L., F. Coito, and R. Neves-Silva. "Neural Observer-Based Approach to Fault Diagnosis applied to a Liquid Level System." (2003). Abstract
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Palma, L. B., and F. V. Coito. "Tuning PCA controllers based on manual control data." Emerging Technologies & Factory Automation (ETFA), 2011 IEEE 16th Conference on. IEEE, 2011. 1-4. Abstract
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Palma, L. B., P. S. Gil, F. V. Coito, and H. Duarte-Ramos. "Dealing with Complexity in Supervision Systems." (2008). Abstract
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Palma, L. B., F. Coito, and R. Neves-Silva. "A combined approach to fault diagnosis in dynamic systems." (2004). Abstract
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Palma, L. B., F. Coito, and R. Neves-Silva. "Sensor fault diagnosis based on neural observers and parameter estimation–application to the three-tank benchmark." VI Portuguese Conf. on Automatic Control, Faro. Indexed at ISI Web of Science (2004). Abstract
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Palma, L. B., F. V. Coito, and RN Silva. "Fault diagnosis based on black-box models with application to a liquid-level system." Emerging Technologies and Factory Automation, 2003. Proceedings. ETFA'03. IEEE Conference. Vol. 2. IEEE, 2003. 739-746. Abstract
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Palma, L. B., and F. V. Coito. "MODELING AND HYBRID CONTROL OF A NONLINEAR DC SERVOMOTOR." 4th Portuguese COnference on Automatic Control - Controlo 2000. SPCA, 2000. Abstract

A nonlinear DC servomotor model with friction, saturation, backlash and motor starting voltage is presented in this paper. Traditionally the position of a servo is controlled with a PD-controller. In the presence of disturbance, PID control results with overshoot and long recovery time. In simulations, the integral time of the controller is modified to fasten the recovery time. To control the position of the servomotor is proposed a Hybrid Control Architecture using a nonlinear PID controller and a Fuzzy PID controller. Simulation results with the Hybrid Controller are presented.

Palma, L. B., F. Coito, and R. Silva. "Adaptive observer based fault diagnosis approach applied to a thermal plant." submitted to 10th Mediterranean Conference on Control and Automation (2002). Abstract
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Palma, L., F. Coito, R. Neves-Silva, and F. Almeida. "A Neural PCA Approach To Fault Detection and Diagnosis in Nonlinear Dynamical Systems." (2006). Abstract
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Palma, L. B., F. V. Coito, and P. S. Gil. "Real-time detection of oscillations in control loops." Power Engineering, Energy and Electrical Drives (POWERENG), 2011 International Conference on. IEEE, 2011. 1-6. Abstract
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Palma, L. B., F. V. Coito, and R. N. da Silva. "Process fault diagnosis approach based on neural observers." Emerging Technologies and Factory Automation, 2005. ETFA 2005. 10th IEEE Conference on. Vol. 1. IEEE, 2005. 4–pp. Abstract
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Palma, L., F. Coito, and R. Neves-Silva. "Failure Analysis on a Process Plant Model Based on Adaptive Filter Techniques." (2003). Abstract
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Palma, L., F. Coito, R. Neves-Silva, and P. Gil. "A Fault Tolerant Approach for Networked Control Systems Using Predictive Models." (2008). Abstract
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Palma, L. B., F. V. Coito, and R. N. da Silva. "Combined approach to fault diagnosis based on principal components and influence matrix." Intelligent Signal Processing, 2005 IEEE International Workshop on. IEEE, 2005. 171-176. Abstract
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Palma, L., R. Neves-Silva, and F. Coito. "Fault tolerant control approach applied to the three-tank system." (2003). Abstract
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Pereira, P., M. Fino, F. Coito, and M. Ventim-Neves. "GADISI–Genetic Algorithms Applied to the Automatic Design of Integrated Spiral Inductors." Emerging Trends in Technological Innovation (2010): 515-522. Abstract
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Pereira, P., A. Sallem, M. Fakhfakh, M. H. Fino, and F. Coito. "A Technology-Aware Optimization of RF Integrated Inductors." (2012). Abstract
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