@article{ author = {salehpouroskouyi, farzin and PourgolMohammad, Mohammad and MoniriMorad, Amin and Abbaspour, Kamal}, title = {Reliability Analysis for Early Design Stage of Electronics and Control System of the Horizontal Drilling Equipment}, abstract ={Reliability analysis for Electronic and control system and providing a model to express the relationship between the various components have crucial importance. This study proposes a methodic approach to analyze the electronic and control system of mechanical system reliability in early design phase with deficiency of the sufficient field data available. In this method, first the different components of the system are identified. The function configuration and relate to each other are considered. Using generic data available through various different standards such as MIL-HDBK-217F and EPRD, failure rate and mean time between failures (MTBF) are calculated for each component. Applying this information, the system reliability model is developed and the relations between components in terms of reliability are explained. In this context, the computation is completed to analyze the reliability of the system. The importance measure technique is utilized to determine the importance of various components of the system. Also using reliability allocation method, reliability of each component is calculated to evaluate the modification required to upgrade the system to the specified reliability goal. Finally, considering the maintenance data of each component, availability estimations and related properties are obtained. As an application, this method is applied on the electrical and control system of a horizontal drilling machine. The results are discussed with concluding remarks in suitability of the proposed methodology.}, Keywords = {Reliability analysis- Availability- Design phase- Electronic and control system- Horizontar drilling equipment}, volume = {1}, Number = {2}, pages = {4-17}, publisher = {Sahand University of Technology}, url = {http://journals.sut.ac.ir/jnsee/article-1-30-en.html}, eprint = {http://journals.sut.ac.ir/jnsee/article-1-30-en.pdf}, journal = {Journal of Nonlinear Systems in Electrical Engineering}, issn = {2322-3146}, eissn = {2322-3146}, year = {2014} } @article{ author = {Rezayi, Mostafa and Farrokhi, Hami}, title = {A New Multiobjective Optimization Method for Power Control in CDMA Cellular Systems}, abstract ={A new multiobjective power control algorithm is presented in this paper in which power update is accomplished using local information. The algorithm benefits a multiobjective optimization technique the objectives of which are designed in a way to not only minimize the users’ transmit power but also maintain the users’ SIR at an acceptable level, on one hand, and reduce as much possible the SIR fluctuations, on the other hand. The convergence characteristics of the proposed method are investigated both theoretically and with simulations. The results indicates that, compared to other existing power control algorithms, the proposed algorithm has a higher convergence speed while reducing user’s transmit power. Introducing the practical version of the proposed algorithm, it is then compared with two existing algorithms including B-BPSC (FSPC) and MOTDPC. Simulation results show significant improvements in the convergence speed and average consumed power.}, Keywords = {distributed power control, multi-objective optimization, cellular systems, CDMA, convergence}, volume = {1}, Number = {2}, pages = {18-33}, publisher = {Sahand University of Technology}, url = {http://journals.sut.ac.ir/jnsee/article-1-42-en.html}, eprint = {http://journals.sut.ac.ir/jnsee/article-1-42-en.pdf}, journal = {Journal of Nonlinear Systems in Electrical Engineering}, issn = {2322-3146}, eissn = {2322-3146}, year = {2014} } @article{ author = {Sheikhalishahi, Safiye and AghasizadeShaarbaf, Sajjad and Mirzaei, Mehdi and KhoshbakhtiSaray, Rahim}, title = {Optimization of control strategy in hybrid electric vehicles considering emission standard of Euro3}, abstract ={The control strategy in hybrid electric vehicles (HEV) determines the energy management between an internal combustion (IC) engine and an electric machine to generate the power required to drive the vehicle. In this study, the parameters of an electric assist control strategy of HEV, which is used in ADVISOR software, are optimized by minimizing the fuel consumption while maintaining the engine emissions below the Euro3 standard. In this way, a parallel HEV has been simulated in two drive cycles and the optimal parameters of controller are obtained by the genetic algorithm (GA). The simulation results show that by optimizing the control parameters, the fuel consumption decreases while satisfying the Euro3 standards and other constraints in various drive cycles. Also, different values for optimal parameters have been extracted. This indicates that the optimal parameters of the controller are dependent on the drive cycle.}, Keywords = {hybrid electric vehicle, nonlinear model, controller optimization, genetic algorithm, fuel consumption, emission standard}, volume = {1}, Number = {2}, pages = {34-44}, publisher = {Sahand University of Technology}, url = {http://journals.sut.ac.ir/jnsee/article-1-35-en.html}, eprint = {http://journals.sut.ac.ir/jnsee/article-1-35-en.pdf}, journal = {Journal of Nonlinear Systems in Electrical Engineering}, issn = {2322-3146}, eissn = {2322-3146}, year = {2014} } @article{ author = {Habibzadeh-Sharif, Amir and Soleimani, Mohamm}, title = {Analysis of the Nonlinear Effects in the Silicon Photonics}, abstract ={Optical interconnects as appropriate alternatives for electrical interconnects in the computer chips and boards can be realized by CMOS-based integrated silicon photonics. Dielectric slot waveguide, as one of the newest optical waveguide structures, can form the infrastructure of the passive and active components in these integrated circuits. The passive components have the linear behavior. In order to realize the all-optical active components such as laser, amplifier, and modulator we can use the nonlinear effects in the silicon photonics waveguides. On the other hand, Si-nc:SiO2 as a new material, has a stronger nonlinear property than Si. The results of the full-wave analyzes of the slot waveguide in the linear and nonlinear regimes show that the slot region of this waveguide can be filled with the Si-nc:SiO2 and also realize a high optical intensity. Therefore, this waveguide intensifies the nonlinear behaviors by two factors.}, Keywords = {Silicon photonics, Nonlinear optics, Optical slot waveguide, Full-wave modal analysis}, volume = {1}, Number = {2}, pages = {45-58}, publisher = {Sahand University of Technology}, url = {http://journals.sut.ac.ir/jnsee/article-1-51-en.html}, eprint = {http://journals.sut.ac.ir/jnsee/article-1-51-en.pdf}, journal = {Journal of Nonlinear Systems in Electrical Engineering}, issn = {2322-3146}, eissn = {2322-3146}, year = {2014} } @article{ author = {ghaemi, sehraneh and Ghanbarpour, Farnaz}, title = {Improvement Tracking Performance of Robust output feedback Model Reference Adaptive Control for a Class of Continuous Linear systems with multiple uncertain time varying state delays}, abstract ={In this paper, a new approach for controller designing of robust output feedback model reference adaptive control with a function of tracking error for a class of continuous linear systems with multiple uncertain time varying state delays is introduced. Proposed controller is not only robust versus of multiple uncertain time delays and external disturbance with uncertain bound but also improve performance of transient and steady state of closed loop system. The stability of closed loop system and error convergence is shown with an appropriate Lyapunov-Krasovskii function. Simulation results show good performance of proposed controller.}, Keywords = {Adaptive control, Systems with time delays, transient and steady state performance}, volume = {1}, Number = {2}, pages = {59-75}, publisher = {Sahand University of Technology}, url = {http://journals.sut.ac.ir/jnsee/article-1-52-en.html}, eprint = {http://journals.sut.ac.ir/jnsee/article-1-52-en.pdf}, journal = {Journal of Nonlinear Systems in Electrical Engineering}, issn = {2322-3146}, eissn = {2322-3146}, year = {2014} } @article{ author = {Hosseinpour, Majid and Mohamadian, Mustafa and YazdianVarjani, Ali}, title = {Design and Analysis of the Droop-Controlled Parallel Four-leg Inverters to Share Unbalanced and Nonlinear Loads}, abstract ={In this paper, the performance of wireless operation of four-leg parallel inverters, at the presence of unbalanced nonlinear loads, is investigated. In order to control the parallel inverters, an inner current and external voltage control loops should be designed. In this paper, a proportional controller for the current internal loop as well as a proportional-resonant one for the voltage external loop are investigated and designed to ensure the proper performance of the system at the presence of unbalanced and nonlinear loads. In this paper, droop control and virtual output impedance loops have formed the power sharing control system for the parallel inverters. The proposed system is able to feed balanced, unbalanced, and nonlinear loads and provides an appropriate sinusoidal voltage waveform for loads by accurately sharing power between the parallel inverters. Simulation results verify the accurate and proper performance of the proposed system.}, Keywords = {four-leg inverter, parallel inverters operation, Droop method, Virtual output resistive impedance}, volume = {1}, Number = {2}, pages = {76-92}, publisher = {Sahand University of Technology}, url = {http://journals.sut.ac.ir/jnsee/article-1-39-en.html}, eprint = {http://journals.sut.ac.ir/jnsee/article-1-39-en.pdf}, journal = {Journal of Nonlinear Systems in Electrical Engineering}, issn = {2322-3146}, eissn = {2322-3146}, year = {2014} }