عبدالرزاق شهاب هادي الجبوري

Abstract Robust control for linear motor (LM) is essential in a mechatronic system where rapid response and high accuracy are requested. This research elaborates the design of robust control approach employing a second-order terminal sliding mode control (2OTSMC) strategy integrated with an online perturbation estimation (PE) technique, namely 2OTSMCPE for an LM system. The proposed control architecture can provide high accuracy in terms of tracking LM performance in nominal and uncertain models. Moreover, adopting PE has facilitated control design and simplified its practical applications. Since there is no need for upper bound system perturbation in the 2OTSMCPE control design, no significant effort is required for control, which avoids the overestimation issue. Furthermore, for optimum performance, we have given a guideline to the parameter's selection of the proposed controller. Finally, simulations studies have been conducted to demonstrate the validity of the 2OTSMCPE controller in terms of time response and tracking performance across the non-singular terminal sliding mode controller (NTSMC).

Abstract Iraq suffers from a major shortage in the supply of electric power for several reasons, such as wars, the economic sanctions, in addition to obsolescence of generation stations. The demand increases by 10% annually, which aggravates the problem and increases the size of the gap between supplied energy and demanded energy.The treatments taken by successive administrations since 2003 until now do not meet ambition, and they cannot address the shortage for several reasons, the most important of which are administrative corruption and poor planning. Suitable and available options have been reviewed to fill the shortage in electric power and keep pace with the increasing demand for it. The most important of them was the investment of clean energy represented by natural gas, which is one of the energy resources available in Iraq, through the establishment of large gas fired generation plants, in addition to using two types of renewable energy, namely solar and wind energy, to provide their resources in Iraq

Abstract In this work, a method is outlined to convert a conventional electro-mechanical meter into a digital power meter as part of an Automated Meter Reading (AMR) system using a simple and cost-effective technique. A conventional electro-mechanical meter was converted to emit digitised pulses with the addition of an optical encoder, allowing automatic transmission of meter reading data and detection of meter tampering. In testing the proposed AMR system, the meter readings as read from the LCD were found to offer an accurate representation of the total power consumed. Further improvements suggested to enhance the functions of the AMR system, including load management and pre-payment. The proposed meter offers substantial savings for electric utility companies as well as enabling users to take advantage of fully automated meter readings.

Abstract: In this paper, a robust sliding mode-based learning control (RSMLC) scheme is developed for a micro-scale actuator (MSA) system. By exploiting the instantaneous information of the system closed-loop stability, a sliding mode controller based on the recursive learning technique is designed. The proposed control approach can govern the sliding variable and tracking error between the desired references and actual displacement of the MSA to asymptotically converge to zero. Unlike conventional sliding mode control (CSMC), no prior knowledge of MSA system uncertainties and parameters variation is required in the RSMLC design. Besides, there is no explicit switching element in the RSMLC structure, it can be considered as a chattering free control method. Meanwhile, the inherent high robustness property of the CSMC is fully preserved in the proposed controller. Where the learning algorithm continuously adjusts the closed-loop response based on the most recent history of closed-loop stability. Thus, the stability and convergence analysis of the RSMLC is proved rigorously. Simulation studies have been conducted for a piezoelectric actuator (PEA) system, as a prototype of MSA. For comparison reasons, these results are presented correspondingly with CSMC results to demonstrate the effectiveness of the proposed controller over the CSMC.

Design of electrical power system for Nano-satellites is presented. The role of this electrical power system is to provide electrical power for all the subsystems of KufaSat .This was achieved by the use of solar cells when the satellite is in direct sunlight and by two Lithium Polymer batteries when the Sun is eclipsed .The batteries are charged by the solar panels through three battery charge regulators which optimize the solar arrays’ voltages independently for maximum power transfer. Power is then transferred to subsystems through a number of power buses, 3.3V, 5V and unregulated.

Abstract-In this paper, a direct fuzzy controller is applied to the attitude stabilization control of a CubeSat. The TakagiSugeno (T-S) model fuzzy controller is evaluated for attitude control of magnetic actuated satellites based on the attitude error including error in the angles and their rates. The detailed design procedure of the fuzzy control system is presented. Simulation results show that precise attitude control is accomplished and the time of satellite maneuver is shortened in spite of the uncertainty in the system

بالنظر لقلة كادر الصيانة تم تشكيل فريق عمل لاسناد أعمال الصيانة في الاقسام الداخلية

Today in 7 pm 27-09-2023