Summary
This paper proposes an improvement on underwater vehicles control strategy using an adaptive sliding‐mode method. This improvement is threefold. First, water current compensation is explicitly dealt within in the control law. Second, a nonlinear parameterization is developed by employing new methods for the design of the sliding surface, aiming at vehicles tracking performance. Third, parameters of the designed sliding surface in the control law are varied according to a nonlinear mapping of thruster forces aimed to energy saving of propulsion system. Three different methods are given for the design of the sliding surface. The proposed control law guarantees global asymptotic stability of the tracking error, and the stability proof is provided in the paper even in the presence of variable currents. Moreover, the tracking performance and energy saving are compared with conventional methodologies to show the effectiveness of the proposed method.
The creation and updating of ANEEL (National Electricity Regulatory Agency) regulatory resolution on distributed generation provided a new business environment for the electricity sector, as well as enabling consumers to generate energy. In this context, distributed microgeneration plants management is a challenge, mainly for electric power distributors and for the entire supply chain and services. In this sense, it is urgent to develop a monitoring and dispatch system in microgeneration plants, in order to optimize the capacity factor of the enterprises and to enable the creation of Virtual Power Plants (VPP). VPPs are part of a new dynamic of the energy sector's strategic environment, which strengthens distributed generation through smart meters capable of communicating with operational centers and thus influencing new business models already diffused by the known smart grids. Included in this scenario, this paper presents a proposal for a monitoring and dispatch system for distributed micro-generation of renewable energies, as well as the engineering solution for a final product focused on market expectations.
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