In this paper, a trajectory planning problem based on high-order polynomials is formulated for a point-to-point motion. The problem aims to find suitable polynomial trajectories that connect an initial to a final configuration while satisfying other specified constraints. The constraints are considered as zero velocity at the endpoint as well as a limitation on acceleration […]
In this paper, a grid connected PV system acting as shunt active power filter for power quality enhancement is presented. Further, a DC-DC boost converter is used to interface the photovoltaic generator with the grid, which provides a continuous power flow from the PV generator into the grid through a Voltage Source Inverter (VSI). Hence, […]
Biological components including cells, proteins, and nucleic acids have been studied by using biological sensors. All compounds in the organisms have sensors with identical mechanical sensors. Most of these sensors are specific cells which are sensitive to physical characteristics of outside environment including light, motion, temperature, magnetic-field, gravity, moisture, vibration, pressure, electrical fields, and sound. […]
Nowadays, renewable energy sources such as photovoltaic and active generators are utilized frequently in modern power systems especially micro-grid. By providing electrical energy using micro-grid systems, the reliability and quality of the system can be improved. A micro-grid connected to the network depends on the main grid and consequently assessing the power quality during independent […]
This article describes a workflow executed with MATLAB simulation and practical measurements for single phase power transformer. In addition, no-load, short-circuit test and load test are achieved in this work. The test procedures are implemented on a real transformer (terco–type) which has specifications of (1KVA, 220/110V, 50Hz). Finally, the simulation results are appeared proximately similar […]
In the recent days, the main challenge for the electrical power system is an economical storage technology. Energy storage is essential for the future Smart Grid (SG) to smooth out the fluctuating output of Renewable Energy Resources (RERs). Even though many good storage technologies are available but either they are not economical or they are […]
In this paper, the structure of a 16-by-16 unsigned hybrid (serial-parallel) multiplier has been proposed. Parallel multipliers, in comparison with serial multipliers, have higher speed and higher power consumption. In hybrid structures, to reduce power and increase speed, both serial and parallel techniques are used. The proposed structure improves propagation delay and reduces power consumption […]
This paper proposes a H∞ Fuzzy robust controller for Doubly Fed Induction Generator (DFIG) based wind turbines. The power exchange between the machine stator and the grid is carried out by acting on the rotor via a bidirectional converter. The control objective is to regulate the stator active and reactive power generated from the DFIG […]
In this paper, dual-hops and multi-hops cognitive radio Ad Hoc networks has been considered. It is vital mentioning that the primary user interference effect on the secondary user has also been considered. The design of the problem is to achieve an optimal solution for channel allocation and power in dual and multi hop in Cognitive […]
The considerable development of the electricity market subjects in recent years has provided a complex and more competitive environment for the participants. Each participant in this environment adopts a special strategy to maximize its profit or minimize its energy costs considering the significant constraints. In this paper, a short term optimal scheduling of thermal units, […]
In this work, Ultra Wide-Band (UWB) microwave filters are designed and fabricated using a rectangular ring resonator. The UWB microwave filters work in the 3.1GHz to 10.6GHz frequency band, which is designed to coverage the FCC frequency spectrum for UWB systems. These filters, in addition to being ultra-wideband, are designed to prevent interference in some […]
This paper is concerned with a controller design method for Networked Control Systems (NCSs) with time-varying random delays. The proposed controller is an event-based controller and is able to effectively save the network bandwidth and energy resources of the system in comparison with common control schemes while guaranteeing the stability of the system. The proposed […]
Distributed Generation (DG) is a common technology in today’s distribution networks due to its exclusive benefits. However, DG units introduce a series of new issues to distribution network beside their benefits. Adding a DG unit to the network can change the direction and magnitude of the power flow and fault currents through branches. It may […]
Identification systems based on biometrics have been conventional more than traditional identification systems in the last two decades. Many biometrics have been provided such as fingerprint, palm, iris, the vein of palm and veins of fingerprint and such. One of the challenges discussed in biometrics is physical damages. The biometric of fingers knuckles is one […]