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This paper develops a global model of a two-stage grid-connected microinverter which uses sliding-mode control laws in both stages. In the study, it is considered that the microinverter is fed by a current source representing the photovoltaic module with a capacitor connected in parallel. The model of the DC-DC stage is obtained from the linearization of the ideal sliding dynamics of the converter...
This paper presents the analysis of the quadratic boost converter operating in sliding-mode control in order to obtain high DC-gain. This approach uses a indirect control of the output voltage based on the use of a sliding surface defined with the input inductor current. The control law is argued through a stability test. The proposed control was implemented in MATLAB simulations with a quadratic...
The open-loop flexible modes identification of a high-speed and high-accuracy pick-and-place parallel robot is carried out based on two approaches: an ARMAX model and a subspace identification technique. Models of piezoelectric dynamics and disturbances can be obtained for many distinct operation conditions, allowing, in a future work, the conception of robust control laws.
Power quality phenomena originated in power distribution systems impact on the electrical power supply system of railway systems, such as the tramway, and in the same way, power electronics used in the traction system impacts on the power quality service of the distribution system. This paper presents a study of the main power quality phenomena involved in the interaction between the power distribution...
Electric transportation systems have been one of the solutions to enhance the massive transport of passengers in large and medium size cities in developed countries. However, in some developing countries, such as Latin American countries, the electric transportation is just now searching has a solution for this problem. As a difference to the developed electric transportation systems, the introduction...
Nowadays Peer-to-Peer (P2P) file-sharing has not only become the dominant source of traffic in the Internet but also an increasingly common way of distributing contents commercially over IP networks, revealing the need of reaching a level of understanding of the behaviour and performance of the different P2P applications similar to that already achieved for other Internet services such as web browsing...
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