Due to disperse nature of renewable energy resources (RES), electricity generation is often taking place in small scale but main drawback is power quality. So to improve power quality issues, integration of renewable energy into the utility grid can be done either at transmission level or the distribution level depending on the scale of generation. The renewable resources like solar energy, win...

CONTEXT Hop tests are functional tests that reportedly require strength, power, and postural stability to perform. The extent to which a triple-hop distance (THD) test measures each of these characteristics is relatively unknown. OBJECTIVE To determine the extent to which the THD predicts performance on clinical measures of power, strength, and balance in athletic individuals. DESIGN Within...

This paper includes modeling and simulation of 180 MW units of pumped storage power plant with Variable speed machines. In this method, voltage source inverters are used instead of traditional cyclo-converters. This paper aims to control the voltage source inverters and maintain DC voltage at a constant value. AC/ DC/ AC converter is used in system configuration structure in order to control an...

  Background: Taraxacum officinale and Berberis vulgaris have long been used as herbal remedies for treatment of a variety of complaints including liver dysfunction and gallbladder disease. However scientifically reliable data are needed to verify their minimum effective doses.   Objective: In present study, the effects of Taraxacum officinale L. and Berberis vulgaris L. root extracts at the di...

of Nonholonomic Wheeled Mobile Robot Hyun-Sik Shim Jong-Hwan Kim Kwangill Koh Dept. of Elec. Eng. Dept. of Elec. Eng. KAIST KAIST LG Industrial Systems Co., Ltd. Taejoen-shi, 305-701, Korea Taejoen-shi, 305-701, Korea Kyongki-do, 430-080, Korea [email protected] [email protected] [email protected] Abstract A variable structure controller(VSC) for a nonholonomic wheeled mobile...

A novel ultra-high compliance, low power, very accurate and high output impedance current output stage (COS) with extremely high output current drive capability is proposed in this paper. The principle of operation of this unique structure is discussed, its most important formulas are derived and its outstanding performance is verified by HSPICE simulation in TSMC 0.18µm CMOS, BSIM3, and Level4...

Variable structure control system design methods are applied to the problem of aircraft spin recovery. A variable structure control law typically has two phases of operation. The reaching mode phase uses a nonlinear relay control strategy to drive the system trajectory to a pre-defined switching surface within the motion state space. The sliding mode phase involves motion along the surface as t...

This work proposes a new method of dynamical control systems implementation using the Cerebellar Model Articulation Controller (CMAC) neural network as part of a variable structure system. CMAC is a neural network easily implemented in hardware, quite efficient in the reproduction of multivariable functions and extremely fast in its training process. These features yield CMAC applications in ro...

In the general framework of hydraulic servo systems, this paper addresses the problem of position control in the presence of important friction nonlinearities. The accent falls on the variable structure methodology, as we try to use its intrinsic robustness properties. Several friction observers, including the one based on a variable structure approach, were incorporated and tested in an accele...

A variable-structure control system designed to enable a fuselage-heavy airplane to recover from spin has been demonstrated in a hand-launched, instrumented model glider airplane (see figure). It has long been known that the most effective spin recovery technique for fuselage-heavy aircraft involves the use of ailerons to roll the airplane into the spin. This technique might be considered count...