Abido
M. A. Abido, Dhahran SA
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20120036095 | METHOD OF GENERATING AN INTEGRATED FUZZY-BASED GUIDANCE LAW USING TABU SEARCH - The present invention relates to the generation of an integrated guidance law for aerodynamic missiles. Particularly, a Tabu search-based approach is utilized for generating an integrated fuzzy guidance law, which includes three separate fuzzy controllers. Each of these fuzzy controllers is activated in a unique region of missile interception. The method includes the following steps: establishing a missile guidance law ƒ(z), where z represents a vector containing fuzzy membership functions and guidance rules associated with the missile guidance law; and optimizing the missile launch guidance law ƒ(z) by minimizing the equation | 02-09-2012 |
20120036096 | METHOD OF GENERATING AN INTEGRATED FUZZY-BASED GUIDANCE LAW FOR AERODYNAMIC MISSILES - The method for generating an integrated guidance law for aerodynamic missiles uses a strength Pareto evolutionary algorithm (SPEA)-based approach for generating an integrated fuzzy guidance law, which includes three separate fuzzy controllers. Each of these fuzzy controllers is activated in a unique region of missile interception. The distribution of membership functions and the associated rules are obtained by solving a nonlinear constrained multi-objective optimization problem in which final time, energy consumption, and miss distance are treated as competing objectives. A Tabu search is utilized to build a library of initial feasible solutions for the multi-objective optimization algorithm. Additionally, a hierarchical clustering technique is utilized to provide the decision maker with a representative and manageable Pareto-optimal set without destroying the characteristics of the trade-off front. A fuzzy-based system is employed to extract the best compromise solution over the trade-off curve. | 02-09-2012 |
Mohamed Abido, Dhahran SA
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20130132313 | METHOD OF REPAIRING FINANCIALLY INFEASIBLE GENETIC ALGORITHM CHROMOSOME ENCODING ACTIVITY START TIMES IN SCHEDULING - The method of repairing financially infeasible genetic algorithm chromosome encoding activity start times in scheduling problems determines cash availability during a given period, identifies all possible activities' schedules, determines the cash requirements for each schedule, ranks schedules based on the contribution on minimizing the increase in the project duration, schedules all activities of the selected schedule, and determines the impact of the scheduled activities on the project cash flow. Thus, the algorithm introduces effective chromosomes that maximize the utilization of the available funds and minimize project duration. | 05-23-2013 |
Mohamed Ali Abido, Dhahran SA
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20150188415 | PHOTOVOLTAIC SYSTEMS WITH MAXIMUM POWER POINT TRACKING CONTROLLER - A system and a method provide a photovoltaic system which regenerates the output characteristics of the photovoltaic at different ambient condition with high precision under all environmental conditions. The photovoltaic system includes a photovoltaic array, a buck/boost converter, a DC link capacitor to connect the buck/booster converter to a load/inverter, an adaptive network-based fuzzy inference maximum power point tracking controller, a voltage control loop, a proportional integral controller to maintain the output voltage of the photovoltaic array to the reference voltage by adjusting the duty ratio of buck/boost converter. | 07-02-2015 |
Mohamed Ali Yousef Abido, Dhahran SA
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20150073735 | METHOD FOR ADAPTIVE FAULT LOCATION IN POWER SYSTEM NETWORKS - The adaptive fault location method for power system networks utilizes phasor measurement units (PMUs) disposed at disparate locations to obtain synchronized phasor measurements. Three different sets of pre-fault voltage and current phasor measurements are obtained at both terminals of the line under test. The three sets of local PMU measurements at each terminal are used for online calculation of a corresponding system's Thevenin equivalent (TE). This representation of the power system pre-fault network is a reduced two-terminal equivalent. Using the method of multiple measurements with linear regression (MMLR), the three sets of PMU measurements are also employed for online calculation of the transmission line parameters (series resistance, series reactance and shunt susceptance). Online determination of the TEs and line parameters can enhance fault location accuracy by avoiding possible mismatch with the actual parameters due to system loading and other environmental conditions. | 03-12-2015 |
Mohammad Ali Yousef Abido, Dhahran SA
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20120259477 | PARTICLE SWARM OPTIMIZATION SYSTEM AND METHOD FOR MICROGRIDS - The particle swarm optimization method for microgrids formulates a control problem as an optimization problem and PSO is used to search the solution space for optimal parameter settings in each mode. The procedure models optimal design of an LC filter, controller parameters and damping resistance in grid-connected mode. Moreover, the procedure optimizes controller parameters and power sharing coefficients in autonomous mode. The method uses particular nonlinear time-domain-based and eigenvalue-based objective functions to minimize the error in the measured power, and also to enhance the damping characteristics, respectively. | 10-11-2012 |