In this paper a hybrid energy system combining variable speed wind turbine, solar photovoltaic and fuel cell generation systems is presented to supply continuous power to residential power applications as stand-alone loads. The wind and photovoltaic systems are used as main energy sources while the fuel cell is used as secondary or back-up energy source. Three individual dc–dc boost converters are used to control the power flow to the load. A simple and cost effective control with dc–dc converters is used for maximum power ...

This paper presents the design of a 2-16 GHz ultra wide band low noise amplifier (UWB LNA). The proposed LNA as again of 11.5 ± 0.85 dB with NF less than 2.82 dB. Good input and output impedance matching, good isolation and linearity are achieved over the operating frequency band. The proposed UWB LNA consumes 18.14 mW of power from 1.8V supply. This UWB LNA is designed and simulated in 0.18 µm CMOS process.

This paper presents studying the performance of distance impedance relay with the presence of FACTS devices. Also the measured impedance at the relaying point in the presence of series FACTS device SSSC, and shunt FACTS device called STATCOM are obtained. A detailed model of both SSSC and STATCOM is introduced and then the faulty system is studied analytically, where the errors in the measured impedance of distance impedance relay are introduced as a result of the presence of series and shunt FACTS

This paper presents studying the performance of distance impedance relay with the presence of FACTS devices. Also the measured impedance at the relaying point in the presence of series FACTS device SSSC, and shunt FACTS device called STATCOM are obtained. A detailed model of both SSSC and STATCOM is introduced and then the faulty system is studied analytically, where the errors in the measured impedance of distance impedance relay are introduced as a result of the presence of series and shunt FACTS

This paper presents studying the performance of distance impedance relay with the presence of FACTS devices. Also the measured impedance at the relaying point in the presence of series FACTS device SSSC, and shunt FACTS device called STATCOM are obtained. A detailed model of both SSSC and STATCOM is introduced and then the faulty system is studied analytically, where the errors in the measured impedance of distance impedance relay are introduced as a result of the presence of series and shunt FACTS

This work proposes a new technique to plan enveloping grasps of 2D objects. The method is guided by the idea that the best grasp is the grasp that has a complete and proper contact between the hand and the object. This technique searches for the maximum value of a Grasp Quality Metric (Q) which corresponds to the best enveloping grasp. To find this value, the proposed technique requires the development of two algorithms. The first one generates a grasp for a given object at a specific approach angle, and it is called the Grasp Generator. The second one is called the Search Algorithm. This algorithm explores all approach angles for the best grasp. The proposed method is used for a two-fingered robotic hand with eight degrees of freedom, and it is implemented and tested on a wide variety of 2D objects to show its effectiveness.

This work proposes a new technique to plan enveloping grasps of 2D objects. The method is guided by the idea that the best grasp is the grasp that has a complete and proper contact between the hand and the object. This technique searches for the maximum value of a Grasp Quality Metric (Q) which corresponds to the best enveloping grasp. To find this value, the proposed technique requires the development of two algorithms. The first one generates a grasp for a given object at a specific approach angle, and it is called the Grasp Generator. The second one is called the Search Algorithm. This algorithm explores all approach angles for the best grasp. The proposed method is used for a two-fingered robotic hand with eight degrees of freedom, and it is implemented and tested on a wide variety of 2D objects to show its effectiveness.

Grasp planning is the problem of finding the contact locations and the forces to apply by the fingers on the object surface to grasp it. This work proposes a new technique that solves a simplified version, (2-D), of this planning problem. This technique is used for planning form-closure grasps. In this type of grasp, the fingers surround the object and hold it securely against the palm. It could be used successfully to restrain the object with minimum concern about the applied forces even when the coefficient of friction is small. Instead of using shape primitives or hand preshapes to simplify the problem solution, this work suggests an optimization technique. This technique searches for the maximum value of a Grasp Quality Metric ( ) which corresponds to the best form-closure grasp. To find this value, the proposed technique requires the development of two algorithms. The first one generates a grasp for a given object at a specific approach angle of the robotic hand, and it is called the Grasp Generator. The second one is called the Search Algorithm. This algorithm explores all approach angles for the best grasp. The outputs of this algorithm are the position and the orientation of the palm and the joint angles of the fingers at the best grasp. The proposed method is used for a two-fingered robotic hand with eight degrees of freedom, and it is implemented and tested on a wide variety of 2D objects. The results show the effectiveness of the method to achieve the planning of form-closure grasps of any 2D object.

Grasp planning is the problem of finding the contact locations and the forces to apply by the fingers on the object surface to grasp it. This work proposes a new technique that solves a simplified version, (2-D), of this planning problem. This technique is used for planning form-closure grasps. In this type of grasp, the fingers surround the object and hold it securely against the palm. It could be used successfully to restrain the object with minimum concern about the applied forces even when the coefficient of friction is small. Instead of using shape primitives or hand preshapes to simplify the problem solution, this work suggests an optimization technique. This technique searches for the maximum value of a Grasp Quality Metric ( ) which corresponds to the best form-closure grasp. To find this value, the proposed technique requires the development of two algorithms. The first one generates a grasp for a given object at a specific approach angle of the robotic hand, and it is called the Grasp Generator. The second one is called the Search Algorithm. This algorithm explores all approach angles for the best grasp. The outputs of this algorithm are the position and the orientation of the palm and the joint angles of the fingers at the best grasp. The proposed method is used for a two-fingered robotic hand with eight degrees of freedom, and it is implemented and tested on a wide variety of 2D objects. The results show the effectiveness of the method to achieve the planning of form-closure grasps of any 2D object.