Encontrados 17 documentos, a visualizar página 1 de 2
The effect of the lubricated revolute joint parameters and hydrodynamic force m...
Machado, Margarida F.; Costa, João; Seabra, Eurico; Flores, PauloIn this work a comprehensive methodology for dynamic modeling and analysis of planar multibody systems with lubricated revolute joints is presented. In general, this type of mechanical systems includes journal-bearings in which the load varies in both magnitude and direction. The fundamental issues associated with the theory of lubrication for dynamically loaded journal-bearings are revisited that allow for the...
Conceptual design and development of an automated co-generation system
Seabra, Eurico; Machado, José Mendes; Lima, MárioCo-generation or Combined Heat and Power (CHP) is the simultaneous generation of both electricity and heat from the same fuel for useful purposes. The fuel varies greatly and can include coal, biomass, natural gas, nuclear material, the sun or heat stored in the earth. Co-generation (as a vector of energy efficiency) and renewable sources of energy possess their own set of low carbon benefits. Coupling co-gener...
Estudo, conceção e construção de um sistema pneumático de aplicação de carga cí...
Seabra, Eurico; Guedes, A.; Barbosa, J.; Silva, Luís F.The joining process carried out in the solid state, named Pressuring Diffusion Welding (PDW), is a modified version of Diffusion Welding (DW). In PDW, the load applied to the samples to be joined varies in a sine wave pattern during the whole process instead of being kept constant as in DW. The PDW process produces high strength joints, due to the fact that the load wave pattern enhances rupture of the oxide sc...
Estudo de barreiras térmicas obtidas por projecção à chama
Seabra, Eurico Augusto Rodrigues deDissertação apresentada [...] para obtenção do grau de Mestre em Engenharia Mecânica, na Faculdade de Engenharia da Universidade do Porto
Evaluation of ultrasonic aluminium degassing by piezoelectric sensor
Puga, Hélder; Gabriel, Joaquim; Barbosa, J.; Seabra, Eurico; Ribeiro, Carlos Silva; Prokic, MiodragThe purpose of this work was the development of a reliable technique to evaluate the intensity of acoustic cavitation during degassing of aluminium melts and to use it to select the optimum processing time for an envisaged degassing efficiency. A high sensitivity piezoelectric disk type device was used as a sensing feedback in water and liquid AlSi9Cu3 alloy. The signal acquisition and processing was carried ou...
A formal approach for aerospace systems control considering SFC specification a...
Borges, Paulo; Machado, José Mendes; Seabra, Eurico; Silva, Luís F.The C programming language is one of the most used in critical embedded real-time controllers applied at aerospace systems. Despite its potential, it is a very general language, with many maintenance problems and with a little or without graphical structure. The absence of formal verification techniques - even if it is possible to find some works associated to C programming language formal verification - is a f...
Design and development of a feeding aid device to assist people with deficiency
Seabra, Eurico; Silva, Luís F.; Machado, José MendesThe present work intends to design new devices of aid to the feeding for individuals with deficiency. Like this, along this paper they are referred the most relevant pathologies, which affect the autonomy of the patient’s feeding, as well as some existent devices in the market. Based on the characteristics of these devices, this research was performed with the main objective of finding the most appropriate actu...
Design of an adapted standing frame for rehabilitation of children with mental ...
Machado, José Mendes; Seabra, EuricoA standing frame is a mechanical (old) or mechatronic (new) equipment, that has as main goal to correct the incapacity of certain individuals for assuming the body’s vertical position. The existing standing frames, on the market, do not allow easy placement of the patient on the device, do not allow full mobility (within and outside of buildings), they are not versatile, they are not modular and they do not all...
Using advanced simulation techniques to improve industrial controller’s dependa...
Seabra, Eurico; Machado, José MendesModelica Modeling language is powerful and suitable for modeling mechatronic systems, being possible to interact different technological aspects and deal, simultaneously with different technologies (mechanical, electrical, pneumatic, hydraulic,..). In this paper it is discussed, in a case study, the possibility of using this language for modeling an automation system (controller and plant) in closed loop behavi...
Design and development of an industrial network laboratory
Leão, Celina Pinto; Oliveira, Filomena; Machado, José Mendes; Seabra, Eurico; Rodrigues, HelenaThis paper presents the first developments of an industrial network laboratory prototype. In the Automation Laboratory several kits have been implemented for local and remote control tests. The approach includes the design and implementation of an industrial network where the common communications protocols can be tested: the Automation Network Locker (ANL). To facilitate the monitoring and control of the netwo...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||