نتایج جستجو برای: h_infty control

تعداد نتایج: 1329044  

Economists were interested in economic stabilization policies as early as the 1930’s but the formal applications of stability theory from the classical control theory to economic analysis appeared in the early 1950’s when a number of control engineers actively collaborated with economists on economic stability and feedback mechanisms. The theory of optimal control resulting from the contributio...

Journal: :iranian journal of oil & gas science and technology 2013
karim salahshoor behnam lotfi

control of well drilling operations poses a challenging issue to be tackled. the loss of well control could lead to the occurrence of blowout as a severe threat, involving the risk of human lives and environmental and economic consequences. conventional proportional-integral (pi) controller is a common practice in the well control operation. the small existing margin between pore pressure and f...

Journal: :iranian journal of fuzzy systems 2006
mohammad hassan fazel zarandi ismail burhan turksen ali husseinizadeh kashan

this paper addresses the design of control charts for both variable ( x chart) andattribute (u and c charts) quality characteristics, when there is uncertainty about the processparameters or sample data. derived control charts are more flexible than the strict crisp case, dueto the ability of encompassing the effects of vagueness in form of the degree of expert’spresumption. we extend the use o...

Journal: :the modares journal of electrical engineering 2010
mohammadtaghi hamidi beheshti ali ahvazi

in this paper, we try to use modeling based on singular perturbation theory, in order to control satellite attitude during the wide rolling angle maneuvering through nonlinear h∞ control strategy. differential equations describing dynamics of the satellite are presented first, and by choosing the appropriate dynamic model for actuators and based on the standard singular perturbation model, the ...

Journal: :practice in clinical psychology 0
hadise heydari organizationسازمان behrooz dolatshahi substance abuse and dependence research center, university of social welfare and rehabilitation sciences, tehran, iran.سازمان alireza mahdaviani organizationسازمان alireza eslaminejad organizationسازمان

objective: this study aimed to investigate the prediction of asthma control on the basis of perceived stress, locus of control, and self-efficacy in adult patients with asthma.  methods: this was a descriptive-correlative and cross-sectional study.the solecty of this study is all asthmatic patients in tehran. our sample consisted of 100 participants who were selected by purposeful sampling meth...

Journal: :journal of research in health sciences 0
mohammad reza monazzam-esmaeelpour zahra hashemi rostam golmohammadi narges zaredar

background: noise pollution is currently a major risk factor in industries in both developed and developing countries . the present study assessed noise pollution in the knitting industry in iran in 2009 and presented a control method to reduce the rate of noise generation. methods: the overall noise level was estimated using the network environmental noise assessment method in sina poud textil...

Journal: :iranian rehabilitation journal 0
nazila akbar fahimi epartment of occupational therapy, university of social welfare and rehabilitation sciences, tehran, iran. seyed ali hosseini epartment of occupational therapy, university of social welfare and rehabilitation sciences, tehran, iran. mehdi rassafiani epartment of occupational therapy, university of social welfare and rehabilitation sciences, tehran, iran. maryam farzad epartment of occupational therapy, university of social welfare and rehabilitation sciences, tehran, iran. hojjat allah haghgoo epartment of occupational therapy, university of social welfare and rehabilitation sciences, tehran, iran.

objectives: postural control deficit is one of the most important problems in children with spastic cerebral palsy (cp). the purpose of this paper is to review the reactive postural control in spastic children with cp. methods: researches on development of reactive postural control in typically developing (td) children and children with cerebral palsy (cp) were analyzed. results: the results of...

Adriano Mendonça Souza Bianca Reichert Claudimar Pereira da Veiga Jean Paulo Guarnieri Luciane Flores Jacobi

The purpose of this article is to evaluate the application of forecasting models along with the use of residual control charts to assess production processes whose samples have autocorrelation characteristics. The main objective is to determine the efficiency of control charts for individual observations (CCIO) and exponentially weighted moving average (EWMA) charts when they are applied to res...

Pitch control is one of t he  major aspects of wind turbine control, particularly over high wi nd s p e e d  a n d  oscillations. General El e c t r i c  (GE) model of  wi n d  t ur bi ne  i s practically compatible with the structure of the wind turbines. I t  h a s  b e e n  p r o v e d t h a t  simulation results using this model are closer to the actual case, compared to other available mod...

2013
Huiping Li

Networked control systems (NCSs) present many advantages such as easy installation and maintenance, flexible layouts and structures of components, and efficient allocation and distribution of resources. Consequently, they find potential applications in a variety of emerging industrial systems including multi-agent systems, power grids, tele-operations and cyberphysical systems. The study of NCS...

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