Abstract Recent developments and widespread in wireless sensor network have led to many routing protocols, many of these protocols consider the efficiency of energy as the ultimate factor to maximize the WSN lifetime. The quality of Service (QoS) requirements for different applications of wireless sensor networks has posed additional challenges. Imaging and data transmission needs both QoS aware routing and energy to... Recent developments and widespread in wireless sensor network have led to many routing protocols, many of these protocols consider the efficiency of energy as the ultimate factor to maximize the WSN lifetime. The quality of Service (QoS) requirements for different applications of wireless sensor networks has posed additional challenges. Imaging and data transmission needs both QoS aware routing and energy to ensure the efficient use of sensors. In this paper, we propose an Efficient, Energy-Aware, Least Cost, (ECQSR) quality of service routing protocol for sensor networks which can run efficiently with best-effort traffic processing. The protocol aims to maximize the lifetime of the network out of balancing energy consumption across multiple nodes, by using the concept of service differentiation, finding lower cost by finding the shortest path using nearest neighbor algorithm (NN), also put certain constraints on the delay of the path for real-time data from where link cost that captures energy nodes reserve, energy of the transmission, error rate and other parameters. The results show that the proposed protocol improves the network lifetime and low power consumption. Read More Read Less

Abstract The present study was carried out in order to track the maximum power point in a variable speed turbine by minimizing electromechanical torque changes using sliding mode control strategy. In this strategy, first, the rotor speed is set at an optimal point for different wind speeds, as a results of which, the tip speed ratio reaches an optimal point, mechanical power coefficient maximizes,... The present study was carried out in order to track the maximum power point in a variable speed turbine by minimizing electromechanical torque changes using sliding mode control strategy. In this strategy, first, the rotor speed is set at an optimal point for different wind speeds, as a results of which, the tip speed ratio reaches an optimal point, mechanical power coefficient maximizes, and wind turbine produces its maximum power and mechanical torque. Then, the maximum mechanical torque is tracked using electromechanical torque. In this technique, tracking error integral of maximum mechanical torque, error, and derivative of error are used as state variables. During changes in wind speed, sliding mode control is designed to absorb the maximum energy from the wind and minimize the response time of maximum power point tracking (MPPT). In this method, the actual control input signal is formed from a second order integral operation of the original sliding mode control input signal. The result of the second order integral in this model includes, control signal integrity, full chattering attenuation, and prevention from large fluctuations in the power generator output. Simulation results, calculated using MATLAB software, have shown the effectiveness of the proposed control strategy for wind energy systems based on the PMSG. Read More Read Less

Abstract The power attack of the hardware circuit is going through the steps of the algorithm write in FPGA, power consumption, data processing and analysis and the existing power attack experiment platform is too decentralized for each step, where the operation is complex, requiring a high degree of integration of the experimental platform for support. The development of a hardware circuit... The power attack of the hardware circuit is going through the steps of the algorithm write in FPGA, power consumption, data processing and analysis and the existing power attack experiment platform is too decentralized for each step, where the operation is complex, requiring a high degree of integration of the experimental platform for support. The development of a hardware circuit based on power attack comprehensive experimental platform SAKURA-G, realized these steps will be integrated into a platform, simplify the operation process, to ensure the accuracy of power acquisition, and realizes parallel data processing, improve the accuracy and efficiency of power attack. Read More Read Less