An Improved Flow Direction Algorithm for Engineering Optimization Problems

Fan, Yuqi; Zhang, Sheng; Wang, Yaping; Xu, Di; Zhang, Qisong

doi:10.3390/math11092217

Cited by 2 publications

(2 citation statements)

References 48 publications

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“…Karami H [34] has shown through tests that the flow direction method has a greater global search capability than the widely used optimization algorithms, and the parameter setup is easier. The flow direction technique is now being used to engineering material issues [35] and tackle machine learning [36]. The flow direction method provides several advantages in the direction of establishing parameters, as seen by its broad application potential.…”

Section: Introductionmentioning

confidence: 99%

Disturbance Observer-Based PID Control System Using DNA Strand Displacement and Its Application in Exponential Gate

Zhang,

2023

IEEE Access

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Synthetic control circuits have demonstrated their effectiveness in molecular process control. However, current synthetic control circuits counteract the impact of disturbances by error signals. A disturbance suppression strategy that combines a disturbance observer with a controller to achieve better disturbance suppression is presented in this paper. A disturbance observer-based PID control system(DOB-PID) is implemented for the first time using chemical reaction networks(CRNs). The controller parameters are obtained using the flow direction algorithm, which significantly reduces the parameter setting time. The DOB-PID based on CRNs achieves improved disturbance suppression without affecting the setpoint tracking characteristics. To overcome the limitation of the classic disturbance observer relying on the inverse nominal model, a modified disturbance observer-based control system(MDOB) is realized using CRNs. The MDOB-PID eliminates the need for the inverse nominal model in the modeling process. Furthermore, the MDOB-PID control system is combined with a feedforward controller, resulting in a modified disturbance observerbased feedback control system(FDOB). This system effectively decouples the set value following and disturbance suppression characteristics, simplifying the parameter tuning process. Additionally, a FDOB-PID control system is established using DNA strand displacement. The FDOB-PID control system proposed in this paper exhibits lower overshoot and better disturbance suppression compared to existing control systems. Finally, a FDOB-PID exponential gate control system is developed to suppress leakage response in calculation process. This system ensures accurate calculation results even in the presence of a leaky response in the exponential gate.

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Section: Introductionmentioning

confidence: 99%

Disturbance Observer-Based PID Control System Using DNA Strand Displacement and Its Application in Exponential Gate

Zhang,

2023

IEEE Access

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“…The presented studies emphasize the importance of obtaining detailed information on local and average heat-transfer coefficients in intake and exhaust systems in order to find ways to enhance the efficiency and environmental friendliness of RICE. Moreover, reliable experimental data on the unsteady heat transfer of pulsating flows in gas dynamic systems are necessary for the development of new mathematical models and the verification of existing ones [25][26][27][28]. In addition, artificial intelligence algorithms are used to optimize thermophysical processes in the gas exchange system of reciprocating machines [29].…”

Section: Introductionmentioning

confidence: 99%

Unsteady Heat Transfer of Pulsating Gas Flows in a Gas-Dynamic System When Filling and Emptying a Cylinder (as Applied to Reciprocating Machines)

Plotnikov

2023

Mathematics

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The thermal and mechanical perfection of the processes in the gas exchange system during the filling and emptying of the cylinder makes it possible to increase the productivity and efficiency of reciprocating machines for various purposes. The study was designed to obtain experimental data on the local heat transfer of pulsating flows in the intake and outlet pipelines of a piston engine model, their analysis, and mathematical description. The scientific novelty of the study is as follows: (1) the patterns of change in the local heat transfer coefficients of pulsating gas flows in the inlet and outlet pipelines for the piston engine model were obtained for the first time; (2) a mathematical description of the experimental data on local and average heat transfer in the inlet and outlet pipelines is proposed. The physical features of the change in the rate of heat transfer in the intake and exhaust systems for a full engine cycle are discussed. A spectral analysis of the harmonic functions of the change in the local heat-transfer coefficient in gas exchange systems is performed. A set of mathematical dependencies of changes in the local and average heat-transfer coefficients of flows in the inlet and outlet pipelines on operation factors are presented. These data can be used to assess the quality of filling and cleaning the cylinder, determining thermal stresses in the details of gas exchange systems, developing devices for using exhaust gas energy, creating engine control systems, and so on. Moreover, the results obtained can be used to adjust (and test) mathematical models, as well as refine engineering methods for calculating gas exchange processes in reciprocating machines for various purposes.

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An Improved Flow Direction Algorithm for Engineering Optimization Problems

Cited by 2 publications

References 48 publications

Disturbance Observer-Based PID Control System Using DNA Strand Displacement and Its Application in Exponential Gate

Disturbance Observer-Based PID Control System Using DNA Strand Displacement and Its Application in Exponential Gate

Unsteady Heat Transfer of Pulsating Gas Flows in a Gas-Dynamic System When Filling and Emptying a Cylinder (as Applied to Reciprocating Machines)

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