Time filter

Source Type

Hamidzadeh S.M.,Khorasan Institute of Higher Education | Yaghoobi M.,Islamic Azad University at Mashhad
Conference Proceedings of 2015 2nd International Conference on Knowledge-Based Engineering and Innovation, KBEI 2015 | Year: 2015

In this paper focuses on the problem of chaos control based on single feedback controller. The proposed feedback control scheme has a simple control structure, and is theoretically and numerically proved to be less conservative than some existing results. In the fact, we solve the problem of set-point control of a permanent-magnet synchronous motor via single feedback control. Using the Lyapunov theory stability controller has been demonstrated. The simulation results demonstrate the effectiveness of the control scheme. © 2015 IEEE.

Khorasani J.,Khorasan Institute of Higher Education | Mashhadi H.R.,Ferdowsi University of Mashhad
2013 21st Iranian Conference on Electrical Engineering, ICEE 2013 | Year: 2013

Regarding the importance of the strategic bidding problem in wholesale energy markets, a method is proposed to design the optimal piece-wise bid function from the viewpoint of a generation company. In this paper, the bidding problem is formulated, assuming the market clearing price as a stochastic variable. The method is used to calculate the optimal bidding curve. A simple example is presented to show the technique of the paper. © 2013 IEEE.

Bahari M.H.,Catholic University of Leuven | Karsaz A.,Khorasan Institute of Higher Education | Pariz N.,Ferdowsi University of Mashhad
International Journal of Innovative Computing, Information and Control | Year: 2011

In this paper, a fast target maneuver detection technique and high accurate tracking scheme is proposed with the use of a new hybrid Kalman filter-fuzzy logic architecture. Due to the stressful environment of target tracking problem such as inaccurate detection and target maneuver, most of existing trackers do not represent desired performance in different situations. In practice, while the conventional Kalman filters (KF) perform well in tracking a target with constant velocity, their performance may be seriously degraded in the presence of maneuver. To reach an accurate target tracking system in such a stressful environment, fuzzy logic-based algorithms with intelligent adaptation capabilities have recently been issued. Although these methods yield reasonable performance in tracking maneuvering targets, their accuracy in non-maneuvering mode was not satisfactory. In this research, based on information about the target maneuver dynamics, a new hybrid tracker (HT) is introduced. The proposed algorithm combines two methodologies into one architecture synergistically. In other words, the KF is used when the target velocity is approximately constant, whereas fuzzy estimator is used when the target maneuvers. Simulation results show that the proposed method is superior to some conventional approaches in tracking accuracy. ICIC International © 2011.

Moayyedian F.,Khorasan Institute of Higher Education | Kadkhodayan M.,Ferdowsi University of Mashhad
Journal of Computational and Applied Research in Mechanical Engineering | Year: 2015

One of the new research fields in plasticity is related to choosing a proper non-associated flow rule (NAFR), instead of the associated one (AFR), to predict the experimental results more accurately. The idea of the current research is derived from combining von Mises and Tresca criteria in the places of yield and plastic potential surfaces in rate-independent plasticity. This idea is implemented using backward Euler method in non-linear finite element simulation. The results are compared with the experimental data for an internally pressurized thick-walled cylinder and it is demonstrates that, using the proposed NAFR in rate-independent plasticity, the experimental results could be predicted more accurately. Finally, it can be said that the current research confirms the results of the previous works on rate-dependent plasticity (viscoplasticity) in steady state conditions. © 2015, Shahid Rajaee Teacher Tarining University (SRTTU). All rights reserved.

Eidiani M.,Khorasan Institute of Higher Education | Zeynal H.,University College
Turkish Journal of Electrical Engineering and Computer Sciences | Year: 2014

Load frequency control (LFC) is one of the significant ancillary services in the electricity markets. The major concerns with LFC models have long been their dynamic response and complexity, as well as market price sensitivity. To cater to the complexity of the dynamic model that is introduced by the LFC and algebraic constraints by the transmission network, the differential-algebraic equation is transformed into a set of ordinary differential equations. This is done by differentiating the network constraints under a certain assumption that can be held throughout the system. To make the model suitable in a market environment, the real power (MW) variable is substituted by the energy ($) variable to emphasize the price signal in the market. The obtained results show that the model is much easier to understand and simpler to implement. The computational complexity of the model is further reduced. Based on the performed simulations, the proposed LFC model functions better in a deregulated environment. A test case comprising 5 buses and 3 machines, with a 2-region system, is used to address the advantages of the proposed LFC model. © TÜBİTAK.

Discover hidden collaborations