Publications

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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 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 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., 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., R. Neves-Silva, and F. Coito. "Fault tolerant control approach applied to the three-tank 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., 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. 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. 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, 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., 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. 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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Pereira, P., M. H. Fino, and F. V. Coito. "Using discrete-variable optimization for CMOS spiral inductor design." Microelectronics (ICM), 2009 International Conference on. IEEE, 2009. 324-327. Abstract
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Pereira, P., F. Coito, and H. Fino. "PSO-Based Design of RF Integrated Inductor." Technological Innovation for Value Creation (2012): 475-482. Abstract
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Pereira, P., M. Helena Fino, F. Coito, and M. Ventim-Neves. "RF integrated inductor modeling and its application to optimization-based design." Analog Integrated Circuits and Signal Processing (2011): 1-9. 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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Pereira, P., H. Fino, F. Coito, and M. Ventim-Neves. "ADISI-An efficient tool for the automatic design of integrated spiral inductors." Electronics, Circuits, and Systems, 2009. ICECS 2009. 16th IEEE International Conference on. IEEE, 2009. 799-802. Abstract
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Pereira, P., H. Fino, F. Coito, and M. Ventim-Neves. "Optimization-Based Design of Nano-CMOS LC-VCOs." Technological Innovation for Value Creation (2012): 453-464. Abstract
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Pinheiro-Pita, HJ, F. Coito, A. Steiger-Garção, R. Gonçalves, and L. Palma. "O projecto OCTOPUS: Modelo da Arquitectura de Software." Jornadas de Engenharia de Telecomunicações e Computadores – JETC99. 1999. Abstract

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