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公开(公告)号：US10370945B2
公开(公告)日：2019-08-06
申请号：US15093954
申请日：2016-04-08
Applicant: Khalifa University of Science and Technology
Inventor： Igor Boiko , Mohammad Luai Hammadih , Khalifa Hasan Al Hosani
Abstract: A method and apparatus for estimating a down-hole annulus pressure, and/or a down-hole tubing pressure, and/or a down-hole lift gas rate through a gas injection valve of gas lift system, which comprises at least one gas lift choke and at least one gas injection valve and at least one production choke. A state estimator is proposed to obtain the values of these down-hole process variables. The estimator contains a number of local estimators and an interpolation module.
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公开(公告)号：US12166432B2
公开(公告)日：2024-12-10
申请号：US18010648
申请日：2021-06-30
Applicant: Khalifa University of Science and Technology
Inventor： Igor Boiko , Ahmed Shehada , Balanthi Mogru Abdul Rahiman Beig , Yan Yan
IPC: H02M7/5387 , G05B11/42 , H02M1/00 , H02M1/12
Abstract: A system including a proportional-integral-derivative (PID) controller, a modified relay feedback test (MRFT) block, a memory block, a biasing block, a dq0-to-abc transformation block, a switch configured to selectively couple output signal of the biasing block or the PID controller output signal to the input of the dq0-to-abc transformation block, a three phase digital pulse width modulator, electronic switches, a voltage sensor configured to measure the output of each voltage of the three phases on the load and produce voltage data signals (Voa, Vob, Voc), and an abc-to-dq0 transformation block having an input being a representative of the phase voltages on the load, and producing an output being a representative of these voltages in the dq0 format.
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公开(公告)号：US12259713B2
公开(公告)日：2025-03-25
申请号：US18010087
申请日：2021-06-29
Applicant: Khalifa University of Science and Technology
Inventor： Igor Boiko , Ahmed Shehada , Balanthi Mogru Abdul Rahiman Beig , Yan Yan
IPC: G05B19/4155
Abstract: A method of automatically tuning a proportional-integral-derivative (PID) controller (102) controlling a DC-DC converter (100) includes substituting the PID controller (102) with a modified relay feedback test (MRFT) (104) controller having a threshold parameter (β) and a magnitude parameter (h), iteratively determining a current error signal (e[k]) by measuring an output voltage (Vo[k]) of the DC-DC converter (100) and comparing it to a desired reference output voltage (Vo-ref), input the error signal (e[k]) to the MRFT (104), determining an output value (u[k]) of the MRFT, update the duty cycle (D) based on the output value (u[k]), operating the DC-DC converter (100) using the updated duty cycle (D), exciting oscillations in the loop containing the MRFT (104) and the DC-DC converter (100), measuring a frequency (Ω0) and amplitude (α0) of the output voltage (Vo[k]), updating PID controller parameters based on the frequency (Ω0) and amplitude (α0), and substituting the MRFT (104) with the PID controller (102).
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公开(公告)号：US12258973B2
公开(公告)日：2025-03-25
申请号：US17793695
申请日：2021-02-02
Applicant: Khalifa University of Science and Technology
Inventor： Khalifa Al Hosani , Igor Boiko , Mohammad Luai Hammadih , Ayman Al Zawaideh
Abstract: A gas compressing system including a plurality of n compressors connected in parallel. Each compressor has a suction line connected to a common suction manifold and a discharge line connected to a common discharge manifold configured to deliver compressed gas to a downstream load. The system also includes a process controller configured to control an average speed of the compressors based upon a discharge pressure in the common discharge manifold or a discharge flow through the common discharge manifold. The system further includes an adaptive load sharing optimizing controller configured to determine the speed of each compressor in the plurality of n compressors. A method of controlling a gas compressing system is also provided.
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