The optimal synthesis of scanned linear antenna arrays

Amaireh, Anas Atef; Al‐Zoubi, Asem S.; Dib, Nihad

doi:10.11591/ijece.v10i2.pp1477-1484

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…That is, by building a combined system of automatic control with differential coupling, by which such estimation is possible. To compensate the effect of an accidental disturbing action (changing the position of the AESA canvas), applied not at the input of the system, it is necessary to enter a link to this action [18][19][20][21]. A block diagram of a mathematical model of the system of automatic control, which was introduced one differential link for indirect measurement ( ) and ( ) is shown in Figure 5.…”

Section: Figure 1 Generalized Functional Diagram Of Sac Dpmentioning

confidence: 99%

Assessment of quality indicators of the automatic control system influence of accident interference

et al. 2020

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This work concentrates the analysis of the system of automatic control of the directive diagram of the moving active electronically scanned array with a limited number of transceiver modules. The analysis revealed a number of shortcomings that lead to a significant increase in standard deviations, quadratic integral estimates, and an increase in transient time. The identified disadvantages lead to a decrease in the efficiency of the antenna system, an increase in the error rate at the reception, the inability of the system to react to disturbances applied to any point of the system in the event of a mismatch of a given signal/noise level. In accordance with the analysis, the mathematical model of the automatic control system of the directional diagram of the moving active electronically scanned array was considered, considering this a new method of estimating the quality indicators of the automatic control diagram of the directional diagram of the active electronically scanned array in a random setting and disturbing action was developed. The difference between the proposed method and the existing method is in the construction of an automatic control system with differential coupling equivalent to the combination due to the introduction of derivatives of the random setting action of the open compensation connection.

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Section: Figure 1 Generalized Functional Diagram Of Sac Dpmentioning

confidence: 99%

Assessment of quality indicators of the automatic control system influence of accident interference

et al. 2020

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“…Moreover, studies focusing on linear antenna array designs have utilized optimization algorithms such as grasshopper optimization algorithms, ant lion optimization and hybrid approaches. These algorithms aim to achieve objectives, like reducing sidelobe radiation and controlling beamwidth [26], [27].…”

Section: Introductionmentioning

confidence: 99%

Firefly algorithm tuning of PID position control of DC motor using parameter estimator toolbox

Jallad,

Badran

2024

Bulletin EEI

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This paper aims to design an accurate angular position control for DC motors using a proportional integral derivative (PID) controller. The estimated DC motor parameters have been calculated using the parameter estimator toolbox in MATLAB, Arduino Mega 2560 and speed sensor to build an accurate model in MATLAB. The optimized PID coefficients are found for the DC motor model using the firefly algorithm (FA), which aims to make the actual angle match the desired value without overshooting and oscillations. The PIC16F877A microcontroller was used to implement the code based on optimized PID coefficients found in MATLAB/Simulink to generate the suitable pulse width modulation (PWM) output. In this work, step input was tested to analyze the characteristics of the system response in terms of rise time, settling time and overshoot. It was found that the controller output response curve which is produced from FA-based-PID reached the desired position without overshoot and any oscillations. The findings established that closed-loop control of any system using a system identification toolbox and optimized PID technique can be applied in real applications using low-cost controllers and sensors such as PIC16F877A microcontroller and analog rotary position sensor, respectively.

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“…Furthermore, they used the differential evolution (DE) method to optimize the switching duration to get a low sidelobe by rejecting the sideband radiation [5]. Bio-inspired optimization methods, the ant lion optimization (ALO) in [9]- [11] and grasshopper optimization algorithms (GOA) in [12]- [14], were implemented to minimize the sidelobe level in a symmetric linear array. They delivered better results compared to well-known optimization methods such as  ISSN: 2502-4752 Indonesian J Elec Eng & Comp Sci, Vol.…”

Section: Introductionmentioning

confidence: 99%

Optimized multibeam synthesis of time-modulated microstrip arrays

Alaydrus

Attamimi

Umaisaroh

2022

IJEECS

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The capability to form the main beam of antennas improves the energy efficiency of wireless systems and enhances radar systems' effectiveness in detecting and tracking objects. The time-modulated array can generate multibeam with arbitrary directions in different spectral parts. This work synthesizes several linear arrays to achieve particular main beams and additional restrictions. We modify the pulse durations and the switch-on instants of the switches in each antenna element in an optimization procedure. The parameters are varied through the simulated annealing by minimizing certain cost functions. We designed three linear arrays: model 1 consists of six elements and has two beams. Model 2 is the improved version of model 1 by rejecting the sidelobes of other spectral contributions at the main beam under consideration. Model 3 consists of sixteen elements and has three different beams. The analytical results were verified by modeling the arrays in the form of microstrip arrays in a numerical simulation with HFSS. We obtained very accurate verification. Distinctive devitations at the region ϑ<-60o and ϑ>60o originate from the radiation characteristics of microstrip antennas, which focus the energy upwards to the region around ϑ=0o.

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The optimal synthesis of scanned linear antenna arrays

Cited by 6 publications

References 18 publications

Assessment of quality indicators of the automatic control system influence of accident interference

Assessment of quality indicators of the automatic control system influence of accident interference

Firefly algorithm tuning of PID position control of DC motor using parameter estimator toolbox

Optimized multibeam synthesis of time-modulated microstrip arrays

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