نتایج جستجو برای: the sliding

تعداد نتایج: 16059370  

This paper proposes a new sliding mode control (SMC)  based model reference adaptive system (MRAS) for sensorless indirect field oriented control (IFOC) of a single-sided linear induction motor (SLIM). The operation of MRAS speed estimators dramatically depends on adaptation mechanism. Fixed-gain PI controller is conventionally used for this purpose which may fail to estimate the speed correctl...

Journal: :physical chemistry research 0
mehrdad fallahah faculty of polymer science, iran polymer and petrochemical institute, p.o. box 14965-115, tehran, iran ahmad rabiee faculty of polymer science, iran polymer and petrochemical institute, p.o. box 14965-115, tehran, iran mohammad ghashghaee iran polymer and petrochemical institute amir ershad-langroudi faculty of polymer processing, iran polymer and petrochemical institute, p.o. box 14965-115, tehran, iran

a superhydrophobic aluminum surface was fabricated through an enhanced low-cost approach and the effects of several relevant factors on static contact angle and sliding angle were investigated. first, the operating parameters including the etching time as well as the reaction time and temperature were varied. next, the so-called chemical factors including three different fatty acids and five di...

2007
Russell J. Bradford Richard W. Dobson John ffitch

The Sliding Discrete Fourier Transform (Sliding DFT) is used as the engine of a phase vocoder, to create a Sliding Phase Vocoder (SPV). With a little care this allows very accurate pitch shifting and low latency, and opens a number of possible extensions. We also consider the use of vector parallel processing to make these techniques a viable option.

Journal: :روش های عددی در مهندسی (استقلال) 0
محمدمهدی سعادت پور m. m. saadatpour and n. a. falah و نصرت الله فلاح

a solution technique for the dynamic analysis of asymmetric base-isolated buildings, subject to earthquake ground motion, is presented. to develop the formulation, a yield surface as a function of both shear force and torsion moment of the sliding surface with rigid perfectly plastic behavior is constituted. to achieve the objective, the yield stress is defined by the friction coefficient throu...

2004
Mihaela Cistelecan

The paper proposes a framework for engineering a coherent society-oriented system using the concept of sliding-mode control from systems theory. The agents are coordinated through local control laws using a switching logic related to the sliding manifolds. The sliding manifolds stand for sub-plans and therefore they are updated every time a change in planning is required. The agents have the ab...

2005
Xing-Gang Yan Sarah K. Spurgeon Christopher Edwards

A class of interconnected systems with nonlinear interconnections and nonlinear disturbances is considered. A continuous nonlinear reduced-order compensator is established by exploiting the structure of the uncertainties. A sliding surface is proposed in an augmented space formed by the system output and the compensator variables, and the stability of the corresponding sliding mode is analysed....

2008
Ahmed TAHOUR Abdelkader MEROUFEL Hamza ABID Abdel Ghani AISSAOUI

This paper presents an application of sliding mode control for switched reluctance motor (SRM) speed. The sliding mode technique finds its stronger justification in the utilization of a robust control law to model uncertainties. A sliding mode controller of the motor speed is then designed and simulated. Digital simulation results shows that the designed sliding speed controller realises a good...

2006
José de Jesús Rubio Wen Yu

In this paper, we present a new sliding mode controller for a class of unknown nonlinear discrete-time systems. We make the following two modifications: 1) The neural identifier which is used to estimate the unknown nonlinear system, applies new learning algorithms. The stability and non-zero properties are proved by dead-zone and projection technique. 2) We propose a new sliding surface and gi...

Journal: :Systems & Control Letters 2016
Debbie Hernández Fernando Castaños Leonid M. Fridman

We present a formula that computes the output of an R-controllable, regular, single-input linear timeinvariant implicit system in such a way that it has prescribed relative degree and zeros. The formula is inspired on different generalizations of Ackermann’s formula. A possible application is in the context of sliding-mode control of implicit systems where, as the first step, one can use the pr...

2003
Yuri B. Shtessel Ilya A. Shkolnikov

Presented is a method of smooth sliding mode control design to provide for an asymptotic second-order sliding mode on the selected sliding surface. The control law is a nonlinear dynamic feedback that in absence of unknown disturbances provides for an asymptotic second-order sliding mode. Application of the second-order disturbance observer in a combination with the proposed continuous control ...

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