Development of a Graph Model and Algorithm to Analyze the Dynamics of a Linear System with Delay

Ubaydulayeva, Shakhnoza R.; A.M.Nigmatov,

doi:10.1109/icieam48468.2020.9111939

Cited by 15 publications

(7 citation statements)

References 12 publications

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“…The longer the sensor inactivity time, the lower the average current consumption of the circuit [10]. The use of microcircuits of the DRV5023 family [12] made it possible to have low current consumption (2.7 mA) of electricity, did not require an additional stabilizer, and also provided a fast turn-on time (35 μs).…”

Section: Resultsmentioning

confidence: 99%

Technologies and means of protection in process of managing pumping stations

2023

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This paper aims to analyze automatic protection and control measures at pump stations in the event of constant accumulation of groundwater and water dripping from the pump, leading to flooding in the pump station engine room. To prevent this, the pumping station's machine room should monitor the level of groundwater and water leaks from the pump and, promptly, automatically remove excess water with a pump. The excess water is collected in special reservoirs. From these, the ERSU series sensor, which is based on a contact electrode controller, does not allow it to constantly monitor the level in the storage tank within the required limits; therefore, as a completely automated system, it is unstable and cannot support the regulatory requirements for preventing it from starting one of its technical operations. The article discusses the positive aspects of technical solutions and experimental work in the DRV5023 IC with MSP430G2131 controller and no more than 2.7 mA consumer, NE555 IC-based timer and pump mode, stable contactless sensor, sensor-based automatic monitoring, and pumping system. The results are given. (12-17 seconds.) Preparation to start the pumping process is also a standard 4.7 V. power supply circuit. The work is based on production experience and is innovative.

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Section: Resultsmentioning

confidence: 99%

Technologies and means of protection in process of managing pumping stations

2023

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“…Hence invariance between the instrumental matrices and the added noise is not possible. Implementing the IVs method to investigate the closed-loop system is only applicable if the additional input signal is applied [17][18][19]. Thus, implementing the algorithm proposed in the present work is not recommended for closed systems.…”

Section: Discussionmentioning

confidence: 99%

Algorithm for adaptive observation based on method of instrumental variables

Nikolov,

Alexandrova,

Ubaydullayeva

et al. 2023

E3S Web of Conf.

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When the input signal and the output value of the object of control cannot be measured accurately, the state vector is estimated. The instrumental variables (IVs) method is a commonly used parameter estimation method [1-10]. The task of adaptive observation is to create state observers containing parameter estimators. In adaptive observers, the matrices A and b or c (depending on the chosen canonical state-space representation form) are assumed to be unknown. In the monitoring process, parameter estimation is performed, the unknown matrices are determined, and then the state vector is calculated. The paper aims to present a non-recurrent adaptive observation algorithm for SISO linear time-invariant (LTI) discrete systems. The algorithm is based on the instrumental variables (IVs) method, and the adaptive state observer (ASO) estimates the parameters, the initial and the current state vectors of the discrete system. The algorithm's workability and effectiveness are proved by using simulation data in MATLAB/Simulink.

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“…If we take into account that pressure -Patm -acts on the sensor membrane and on the side of the lower chamber through the water column H, then the expression takes the form: (4) If the value of the level h increases to the value h2, then the pressure P should correspondingly decrease by the amount…”

Section: Methodsmentioning

confidence: 99%

“…Thus, the level, according to the developed principle, is determined through the weight pressure exerted by a column of water enclosed in the cavity of the measuring tube and the sensor chamber, between the membrane and the boundary of the measured level [4]. In this case, level fluctuations change the value of the desired pressure, which is converted by an inductive converter into voltage, and thereby determines the value of the sensor output signal.…”

Section: Methodsmentioning

confidence: 99%

Hydrostatic method in an adapted device level control for on-farm channels

Usmanov,

Yadgarova,

Nigmatov

2023

E3S Web of Conf.

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The operation of a hydrostatic water level control device is based on determining hydrostatic pressure readings when the height of the liquid column changes. A device for such measurements with differential sensors requires the installation of a surge vessel, which narrows the possibilities for using such sensors. Therefore, the task was set to get rid of the equalization vessel, which makes it possible to adapt this method to control the level in on-farm channels in the agricultural sector. The experimental studies carried out made it possible to establish the ability of the developed hydrostatic method and device to measure and generate the output electrical signal.

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Development of a Graph Model and Algorithm to Analyze the Dynamics of a Linear System with Delay

Cited by 15 publications

References 12 publications

Technologies and means of protection in process of managing pumping stations

Technologies and means of protection in process of managing pumping stations

Algorithm for adaptive observation based on method of instrumental variables

Hydrostatic method in an adapted device level control for on-farm channels

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