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Journal articles on the topic 'Transient Analysis of Control Systems'

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Author: Grafiati

Published: 10 December 2022

Last updated: 19 February 2023

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1

Easterby, J. S. "Integration of temporal analysis and control analysis of metabolic systems." Biochemical Journal 269, no. 1 (July 1, 1990): 255–59. http://dx.doi.org/10.1042/bj2690255.

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A theory is developed that integrates approaches to the analysis of pathway transient response and metabolic control analysis. A Temporal Control Coefficient is defined that is a measure of the system's transient response to modulation of enzyme activity or concentration. The approach allows for the analysis of the establishment of a steady state from rest, of the system's ‘agility’ of response to minor perturbations of a pre-existing steady state and of the macroscopic transition between steady states. In the last-mentioned case it is shown that, like the transient time itself, the control of transient response retains the property of independence from the mechanism of the transition. In consequence, the Temporal Control Coefficient can be defined in terms of the control properties of the initial and final states alone without reference to the mechanism of transition. A summation property is shown to apply to the Temporal Control Coefficients in each case. Connectivity relationships between elasticities and Temporal Control Coefficients are also established.

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2

Abubakar, Ukashatu, Saad Mekhilef, Hazlie Mokhlis, Mehdi Seyedmahmoudian, Ben Horan, Alex Stojcevski, Hussain Bassi, and Muhyaddin Hosin Rawa. "Transient Faults in Wind Energy Conversion Systems: Analysis, Modelling Methodologies and Remedies." Energies 11, no. 9 (August 27, 2018): 2249. http://dx.doi.org/10.3390/en11092249.

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This paper presents an in-depth review of classical and state-of-the-art models for analysing the transient stability in wind energy conversion systems. Various transient simulation models for a number of wind turbine generator (WTG) configurations are introduced, under different disturbances. The mitigation is achieved, by manipulating the generator speed and power electronics control, whereas the protection is implemented using conventional, intelligent or digital relays for the safety of sensitive components, in case of transient fault occurrence. The various control systems in WECS are basically employed to transform and regulate the varying frequency, owing to the stochastic nature of wind speed, to the standard 50-Hz or 60-Hz frequency for coupling to an existing electrical utility grid. It has been observed that the control and protection schemes in wind energy systems are concurrently applied. Transient faults in WECSs are a dominant power quality problem especially in the doubly-fed induction generator (DFIG), and often classified as overcurrent or overvoltage transients. These transients are measured using the transient stability index and analysed using the EMTDC/PSCAD software. In addition, the inertia of the rotating masses of wind turbine generators is often characterized by a transient torque, which generates oscillations in power systems.

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3

Hou, Yukan, Yuan Li, Yuntian Ge, Jie Zhang, and Shoushan Jiang. "Modeling of assembly systems with complex structures for throughput analysis during transients." Assembly Automation 39, no. 2 (April 1, 2019): 262–71. http://dx.doi.org/10.1108/aa-12-2017-172.

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Purpose The purpose of this paper is to present an analytical method for throughput analysis of assembly systems with complex structures during transients. Design/methodology/approach Among the existing studies on the performance evaluation of assembly systems, most focus on the system performance in steady state. Inspired by the transient analysis of serial production lines, the state transition matrix is derived considering the characteristics of merging structure in assembly systems. The system behavior during transients is described by an ergodic Markov chain, with the states being the occupancy of all buffers. The dynamic model for the throughput analysis is solved using the fixed-point theory. Findings This method can be used to predict and evaluate the throughput performance of assembly systems in both transient and steady state. By comparing the model calculation results with the simulation results, this method is proved to be accurate. Originality/value This proposed modeling method can depict the throughput performance of assembly systems in both transient and steady state, whereas most exiting methods can be used for only steady-state analysis. In addition, this method shows the potential for the analysis of complex structured assembly systems owing to the low computational complexity.

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4

Wang, Pengfei, Jiashuang Wan, Run Luo, Shifa Wu, Xinyu Wei, and Fuyu Zhao. "ICONE23-2027 ANALYSIS OF NSSS CONTROL SYSTEM RESPONSES DURING LOAD REJECTION TRANSIENT FOR AP1000." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–2—_ICONE23–2. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-2_13.

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5

Yan, Wei, Yong Chun Yang, and Xu Feng Guo. "Analyze the Transient Response of a Control Systems." Advanced Materials Research 706-708 (June 2013): 639–43. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.639.

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It is important for the control system analyst to understand the complete relationship of the complex-frequency representation of a linear system, the poles and zeros of its transfer function, and its time-domain response to step and other inputs. In such areas as signal processing and control, many of the analysis and designed collations are done in the complex-frequency plane, where a system model is represented in terms of the poles and zeros of its transfer functions.

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6

Waindok, Andrzej, and Paweł Piekielny. "Transient Analysis of a Railgun with Permanent Magnets Support." Acta Mechanica et Automatica 11, no. 4 (December 1, 2017): 302–7. http://dx.doi.org/10.1515/ama-2017-0046.

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Abstract The calculation and measurement results of transients for an electrodynamic accelerator with permanent magnet support have been presented in this paper. The calculations have been made using the magnetostatic model in the Maxwell software, as well as using a Matlab/Simulink transient model. The waves of mechanical parameters (projectile velocity and acceleration, force) and electric ones (excitation current and capacitor voltage) have been analyzed for different supply conditions (voltage value, capacitance). The efficiency and projectile energy have been studied as well. The mathematical models have been verified experimentally using the original laboratory stand. A good conformity between calculation and measurement results has been obtained.

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7

Jaleel, Hassan, and Jeff S. Shamma. "Transient Response Analysis of Metropolis Learning in Games." IFAC-PapersOnLine 50, no. 1 (July 2017): 9661–67. http://dx.doi.org/10.1016/j.ifacol.2017.08.1927.

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8

Bell, R. D., N. W. Rees, and C. X. Lu. "Transient Analysis of Power Plant Deaerators." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 206, no. 3 (August 1992): 157–64. http://dx.doi.org/10.1243/pime_proc_1992_206_326_02.

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A mathematical model suitable for predicting the transient behaviour of deaerator plant is presented. The model is based on energy and mass balance equations applied to the deaerator, storage tank and feed pump suction pipe. The model parameters are based entirely on the physical characteristics of the plant, and hence the model can be easily adapted to plants of different size. A comparison with data collected from a deaerator plant operating on a 500 MW unit indicates that the model gives good transient responses and can be used to predict accurately the onset of cavitation in the feed pump.

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9

Koc, Burhanettin, and Bülent Delibas. "Impact Force Analysis in Inertia-Type Piezoelectric Motors." Actuators 12, no. 2 (January 26, 2023): 52. http://dx.doi.org/10.3390/act12020052.

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In an inertia-type motor, a piezoelectric multilayer actuator is espoused to a transient vibration velocity as high as 1.0 m/s during slip time. This vibration velocity makes the inertia-type motors dynamic but not quasi-static. We propose a kinetic model to describe the condition under which slippage can occur between a slider and a stator. The transient current absorbed by the multilayer actuators in a stator during slip time defines the slippage behavior of the slider. A new thickness-mode force factor expression (A33), which is a relation between the transient current and the transient vibration velocity, is described in electrical domain. Impact force acting on a friction coupler produced by the actuators in the stator is proportional to the rate of change in the transient current during the sliding time. Additionally, we present the structure and characteristics of a two-phase inertia-drive-type piezoelectric motor, on which the proposed model was evaluated. Driving the multilayer actuators with truncated and mirrored sawtooth signals enhances the system dynamics. As one actuator expands and the other shrinks, their respective hysteretic nonlinearities are canceled. The motor operating frequency can be as great as 30 kHz and typically load characteristics are unloaded velocity greater than 16.0 mm/s and generated force higher than 3.0 N.

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10

Fehér, Áron, and Lőrinc Márton. "Approximation-based Transient Behavior Analysis of Multi-Agent Systems with Delay." IFAC-PapersOnLine 51, no. 14 (2018): 159–64. http://dx.doi.org/10.1016/j.ifacol.2018.07.216.

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11

Li, Xiaoli, Kang Wang, and Yang Li. "Multiple Model ILC for Continuous-Time Nonlinear Systems." Abstract and Applied Analysis 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/984742.

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Multiple model iterative learning control (MMILC) method is proposed to deal with the continuous-time nonlinear system with uncertain and iteration-varying parameters. In this kind of control strategy, multiple models are established to cover the uncertainty of system; a switching mechanism is used to decide the most appropriate model for system in current iteration. For system operating iteratively in a fixed time interval with uncertain or jumping parameters, this kind of MMILC can improve the transient response and control property greatly. Asymptotical convergence is demonstrated theoretically, and the control effectiveness is illustrated by numerical simulation.

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12

MU, Chao-Xu, Xing-Huo YU, and Chang-Yin SUN. "Phase Trajectory and Transient Analysis for Nonsingular Terminal Sliding Mode Control Systems." Acta Automatica Sinica 39, no. 6 (March 25, 2014): 902–8. http://dx.doi.org/10.3724/sp.j.1004.2013.00902.

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13

Zhou, Chunjie, Xiongfeng Huang, Xiong Naixue, Yuanqing Qin, and Shuang Huang. "A class of general transient faults propagation analysis for networked control systems." IEEE Transactions on Systems, Man, and Cybernetics: Systems 45, no. 4 (April 2015): 647–61. http://dx.doi.org/10.1109/tsmc.2014.2384480.

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14

Sun, Y. Z., X. Li, M. Zhao, and Y. H. Song. "New Lyapunov function for transient stability analysis and control of power systems with excitation control." Electric Power Systems Research 57, no. 2 (March 2001): 123–31. http://dx.doi.org/10.1016/s0378-7796(01)00085-2.

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15

Šunj, Ermin, Mirza Šarić, and Jasna Hivziefendic. "Wind generator transient response analysis and improvement using BESS." IFAC-PapersOnLine 55, no. 4 (2022): 322–27. http://dx.doi.org/10.1016/j.ifacol.2022.06.053.

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Zhu, Lijun, and David J. Hill. "Transient Stability Analysis of Microgrids with Network-Preserving Structure." IFAC-PapersOnLine 49, no. 22 (2016): 339–44. http://dx.doi.org/10.1016/j.ifacol.2016.10.420.

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17

SHAABAN, H., and LJ T. GRUJIĆ. "Transient stability analysis of power systems via aggregation on subsets." International Journal of Control 59, no. 6 (June 1994): 1401–19. http://dx.doi.org/10.1080/00207179408923138.

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18

Szczebiot, Ryszard, Roman Kaczyński, and Leszek Gołdyn. "Numerical Criterion for the Duration of Non-Chaotic Transients in ODEs." Acta Mechanica et Automatica 16, no. 4 (November 15, 2022): 388–92. http://dx.doi.org/10.2478/ama-2022-0046.

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Abstract The paper proposes an original numerical criterion for the duration analysis of non-chaotic transients based on the Euclidean norm of a properly defined vector. For this purpose, transient trajectories, prior to their entering a small neighbourhood of the limit cycle, are used. The vector has been defined with its components constituting the lengths of the sections, which connect the origin of the coordinate system with appropriately determined transient trajectory points. The norm of the vector for the analysis of non-chaotic transients has also been applied. As an assessment criterion of transients, the convergence of the norm to small neighbourhood of the limit cycle with the assumed accuracy is used. The paper also provides examples of the application of this criterion to the Van der Pol oscillators in the case of periodic oscillations.

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19

Junchangpood, Aphaiwong. "Unsteady Flow Simulation of Directional Control Valve in Electro-Hydraulic Systems by Numerical Analysis." Applied Mechanics and Materials 607 (July 2014): 382–85. http://dx.doi.org/10.4028/www.scientific.net/amm.607.382.

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The objective of the present paper is a numerical analysis of the transient flow through a 4/3 hydraulic closed center direction control valve. The real-time discharge coefficients corresponding to supply flow difference have been considered. In order to develop an intelligent control system for an electro-hydraulic system (EHS), a new controller has recently been proposed to control those parameters in a complex system. However, a mathematical model of the EHS including the transient parameters has not been clarified. The main objective of this paper is to numerically analyze the dynamic characteristics of the directional control valve and also the flow behaviors in the electro-hydraulic system control. Both the steady state and transient flow though the valve which affect to flow-pressure coefficient were numerically considered. Moreover, this paper presents numerical results, which explain the flow behaviors related with the real-time pressure drop and discharge coefficient. Both a high inlet flow and a large opening spool have determined the pressure drop increment.

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20

Delgado, J., and J. C. Liao. "Metabolic control analysis using transient metabolite concentrations. Determination of metabolite concentration control coefficients." Biochemical Journal 285, no. 3 (August 1, 1992): 965–72. http://dx.doi.org/10.1042/bj2850965.

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The methodology previously developed for determining the Flux Control Coefficients [Delgado & Liao (1992) Biochem. J. 282, 919-927] is extended to the calculation of metabolite Concentration Control Coefficients. It is shown that the transient metabolite concentrations are related by a few algebraic equations, attributed to mass balance, stoichiometric constraints, quasi-equilibrium or quasi-steady states, and kinetic regulations. The coefficients in these relations can be estimated using linear regression, and can be used to calculate the Control Coefficients. The theoretical basis and two examples are discussed. Although the methodology is derived based on the linear approximation of enzyme kinetics, it yields reasonably good estimates of the Control Coefficients for systems with non-linear kinetics.

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21

Hong, Junho, Yong-Hwa Kim, Hong Nhung-Nguyen, Jaerock Kwon, and Hyojong Lee. "Deep-Learning Based Fault Events Analysis in Power Systems." Energies 15, no. 15 (July 30, 2022): 5539. http://dx.doi.org/10.3390/en15155539.

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The identification of fault types and their locations is crucial for power system protection/operation when a fault occurs in the lines. In general, this involves a human-in-the-loop analysis to capture the transient voltage and current signals using a common format for transient data exchange for power systems (COMTRADE) file. Then, protection engineers can identify the fault types and the line locations after the incident. This paper proposes intelligent and novel methods of faulty line and location detection based on convolutional neural networks in the power system. The three-phase fault information contained in the COMTRADE file is converted to an image file and extracted adaptively by the proposed CNN, which is trained by a large number of images under various kinds of fault conditions and factors. A 500 kV power system is simulated to generate different types of electromagnetic fault transients. The test results show that the proposed CNN-based analyzer can classify the fault types and locations under various conditions and reduce the fault analysis efforts.

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22

Junchangpood, Aphaiwong. "CFD Analysis of Energy Loss of Direction Control Valve in Electro-Hydraulic Systems with Inverter." Applied Mechanics and Materials 607 (July 2014): 393–96. http://dx.doi.org/10.4028/www.scientific.net/amm.607.393.

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This paper presents a new approach for reducing energy consumption coupled with force and position controls in the electro-hydraulic systems (EHS). The EHS inverter will be added for control to vary the speed of electric motor driven hydraulic pump. In addition, a single directional control valve is used to control the system parameters, which cause loss of energy. The main objective of this research is to numerically analyze the energy loss in the new control approach in the EHS with the inverter by using a simple directional control valve. The spool displacements of 4/3 hydraulic closed center directional control valve, transient flow-pressure coefficient and energy loss were simulated with computational fluid dynamics (CFD). In addition, this paper presents CFD results. The relationships of flow rate variables with time-dependent pressure drop and energy loss were addressed. The flow behaviors related with transient flow-pressure coefficients were also discussed. It is found that the loss of energy increases, depending on both the large opening spool displacement and the inlet flow variable.

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23

Lu, D., and X. Zhang. "Transient stability analysis and control of power systems with considering flux decay by energy function approach." Bulletin of the Polish Academy of Sciences: Technical Sciences 60, no. 1 (March 1, 2012): 3–8. http://dx.doi.org/10.2478/v10175-012-0001-1.

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Transient stability analysis and control of power systems with considering flux decay by energy function approach In this paper, transient stability of power systems with structure preserving models is considered. A Hamiltonian function which can be regarded as a Lyapunov function for the system is proposed. Based on this, the influence of flux decay dynamics, especially during a fault, on transient stability is analyzed. With the increase of load power, the variation of stability boundary in the rotor angle/E'q plane is shown. The Energy-based excitation control, aiming at injecting additional damping into the post-fault system may reduce the critical clearing time (CCT). This can be demonstrated by the comparison of different flux decay dynamics in the fault-on condition, and the reason is illustrated by the relationship between rotor angle/E'q and the stability boundary. An improved control strategy is proposed and applied to increase the CCT. Simulation results verify that improvement is obtained both in transient stability and dynamic performance.

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24

Bristow, Douglas A., and John R. Singler. "Towards transient growth analysis and design in iterative learning control." International Journal of Control 84, no. 7 (July 2011): 1234–45. http://dx.doi.org/10.1080/00207179.2011.596224.

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25

Jamshidi, Reihaneh, Yuanfen Chen, Kathryn White, Nicole Moehring, and Reza Montazami. "Mechanics of Interfacial Bonding in Dissimilar Soft Transient Materials and Electronics." MRS Advances 1, no. 36 (2016): 2501–11. http://dx.doi.org/10.1557/adv.2016.432.

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ABSTRACTSoft transient electronics of polymeric substrates and silver-ink electronics are studied for correlated mechanical-electrical properties. Experimental and predictive finite element analysis are used to understand, explain and predict delamination, cracking, buckling, and failure of printed conductive components of such systems. An active transient polymer system consisting of poly(vinyl alcohol) and sodium bicarbonate is introduced that results in byproducts (alkaline and bubbles) when undergoing transiency. These byproducts are facilitated to control and expedite transiency of the electronic components based on redispersion of metallic nano/micro materials. Complete mechanical and electrical characterization of such systems is reported.

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26

Fehér, Áron, and Lőrinc Márton. "Transient Behaviour Analysis and Design for Platoons with Communication Delay." IFAC-PapersOnLine 52, no. 18 (2019): 13–18. http://dx.doi.org/10.1016/j.ifacol.2019.12.199.

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27

Chang, Cheng-Yuan, Sen M. Kuo, Chung-Ying Ho, and Kuo-Kai Shyu. "Analysis and enhancement of narrowband active noise control systems with disturbance." Journal of Vibration and Control 24, no. 11 (December 14, 2016): 2247–60. http://dx.doi.org/10.1177/1077546316684475.

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The disturbance at error sensors will degrade the performance of active noise control (ANC) systems, resulting in slow convergence and decreased noise reduction problems. This paper analyzes the disturbance effects on narrowband ANC (NANC) systems and proposes modified algorithm to enhance both the transient and steady-state performance. A delayless bandpass filterbank is designed to eliminate out-of-band disturbance in the generated individual error signals for updating the corresponding adaptive filters. The theoretical analysis and improved performance are verified by computer simulations using measured transfer functions from the experimental setup.

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28

Traverso, Alberto, Federico Calzolari, and Aristide Massardo. "Transient Analysis of and Control System for Advanced Cycles Based on Micro Gas Turbine Technology." Journal of Engineering for Gas Turbines and Power 127, no. 2 (April 1, 2005): 340–47. http://dx.doi.org/10.1115/1.1839918.

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Microturbines have a less complex mechanical design than large-size gas turbines that should make it possible to fit them with a more straightforward control system. However, these systems have very low shaft mechanical inertia and a fast response to external disturbances, such as load trip, that make this very difficult to do. Furthermore, the presence of the recuperator requires smooth variations to the Turbine Outlet Temperature (TOT), when possible, to ensure reduced thermal stresses to the metallic matrix. This paper, after a brief overview of microturbine control systems and typical transients, presents the expected transient behavior of two advanced cycles: the Externally Fired micro Gas Turbine (EFmGT) cycle, where the aim is to develop a proper control system set-up to manage safe part-load operations at constant rotational speed, and a solar Closed Brayton Cycle (CBC), whose control system has to ensure the maximum efficiency at constant rotational speed and constant Turbine Inlet Temperature (TIT).

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29

Cristalli, Cristina, and Dariusz Grabowski. "Multivariate Analysis of Transient State Infrared Images in Production Line Quality Control Systems." Applied Sciences 8, no. 2 (February 7, 2018): 250. http://dx.doi.org/10.3390/app8020250.

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30

Van As, H. "Transient Analysis of Markovian Queueing Systems and Its Application to Congestion-Control Modeling." IEEE Journal on Selected Areas in Communications 4, no. 6 (September 1986): 891–904. http://dx.doi.org/10.1109/jsac.1986.1146409.

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31

Wu, Shih-Chin, Che-Wei Chang, and Jerrold M. Housner. "Finite element approach for transient analysis of multibody systems." Journal of Guidance, Control, and Dynamics 15, no. 4 (July 1992): 847–54. http://dx.doi.org/10.2514/3.20916.

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32

Trindyuk, V. A., and G. I. Kiyko. "Analysis and synthesis of robust control for linear systems of double damping." Izvestiya MGTU MAMI 6, no. 2-2 (March 20, 2012): 298–305. http://dx.doi.org/10.17816/2074-0530-68548.

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The paper sets forth the method for constructing a robust control suspension of the automobile when there is an interval uncertainty of car cargo weight and drivers’ mass as well as the impossibility of measuring deviations of the car body and the driver's seat of their state of rest. The paper gives clear justification for the relevance of the application of synthesized robust control in comparison with other on the quality of the transient processes.

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Pukrushpan, Jay T., Huei Peng, and Anna G. Stefanopoulou. "Control-Oriented Modeling and Analysis for Automotive Fuel Cell Systems." Journal of Dynamic Systems, Measurement, and Control 126, no. 1 (March 1, 2004): 14–25. http://dx.doi.org/10.1115/1.1648308.

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Fuel Cells are electrochemical devices that convert the chemical energy of a gaseous fuel directly into electricity. They are widely regarded as a potential future stationary and mobile power source. The response of a fuel cell system depends on the air and hydrogen feed, flow and pressure regulation, and heat and water management. In this paper, we develop a dynamic model suitable for the control study of fuel cell systems. The transient phenomena captured in the model include the flow and inertia dynamics of the compressor, the manifold filling dynamics (both anode and cathode), reactant partial pressures, and membrane humidity. It is important to note, however, that the fuel cell stack temperature is treated as a parameter rather than a state variable of this model because of its long time constant. Limitations and several possible applications of this model are presented.

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Venkita, Seshan Ramanathan, Dehlia Willemsen, Mohsen Alirezaei, and Henk Nijmeijer. "Switching from autopilot to the driver: A transient performance analysis." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 5 (October 14, 2019): 1346–60. http://dx.doi.org/10.1177/0954407019878540.

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One of the main safety concerns associated with semi-autonomous vehicles is the sharing of control between a human driver and an autonomous driving system. Even with an attentive driver, such switches in control may pose a threat to the safety of the driver and the surrounding vehicles. The aim of this study is to develop an indicator that can measure the level of safety during a driver take-over, using knowledge about the system known a priori. A model-based approach is used to analyse the system with special focus on the lateral dynamics of the vehicle. The driver and the vehicle are modelled as linear systems, and a path tracking controller is used to serve as an autonomous system. With this structure, shared control is studied as a switched system, in which the vehicle’s lateral control switches between the autonomous system and the driver. A bound on the transient dynamics that arise due to a switch is derived, using the induced [Formula: see text] norm. This bound is then used to formulate an indicator that checks if the states/outputs of interest are within acceptable limits. A comparison with simulation results has shown that the indicator successfully captures the effect of different system parameters on take-over safety, although in a slightly conservative manner. This indicator can be further developed as a tool to be used in the design and evaluation of shared-/multi-modal control systems in future vehicles.

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35

Eglynas, Tomas, Mindaugas Jusis, Sergej Jakovlev, Audrius Senulis, Arunas Andziulis, and Saulius Gudas. "Analysis of the efficiency of shipping containers handling/loading control methods and procedures." Advances in Mechanical Engineering 11, no. 1 (January 2019): 168781401882122. http://dx.doi.org/10.1177/1687814018821229.

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Most modern quay cranes operate under the operator’s control. Lifting, lowering, and transporting a container from one platform to another are just some of the actions that a person is responsible for, but the negative consequences of handling can be caused not only by his actions. An error, loading transient instability, or an undervalued environmental factor in the control algorithm can cause a risk to human safety, container, and cargo security. In order to control cargo-handling risk, it is necessary to improve the cargo control systems not only by changing their software, but also by creating additional control algorithms and systems. These systems with programmed control algorithms should be integrated into existing systems to control cargo security and its transfer time. In this article, transient processes and dynamic property of the cargo-handling operation are described and multibody dynamics simulation performed using laboratory prototype of a quay crane. The experimental research performed and integrated autonomous quay crane control algorithm developed with the proposed embedded container swinging control subroutine operated in optimal mode when the control system used PID controller with a feedback including additional PI controller and S-shaped input signal for the analyzed case with the defined parameter set.

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Pankratova, Nataliya, and Igor Golinko. "Electric heater mathematical model for cyber-physical systems." System research and information technologies, no. 2 (September 14, 2021): 7–17. http://dx.doi.org/10.20535/srit.2308-8893.2021.2.01.

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The article discusses the heat and mass transfer dynamic model for an electric heater with lumped parameters, which allows transient processes simulation for the main influences. The proposed model is recommended to be used in cyber-physical systems for forecasting and evaluating the effectiveness of control systems integrated into a single information management system. The developed model can be used by specialists for the analysis and synthesis of control systems for balanced ventilation systems or industrial air conditioners. As an example, a numerical simulation of transient processes along the action main channels for an electric heater HE 36/2 manufactured by VTS CLIMA was carried out. The significant advantage of the proposed model is the possibility for using it for the synthesis and analysis of multidimensional control systems.

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Lakhani, Rohan, C. R. Srinivasan, and Srividya R. "Transient analysis of systems exhibiting inverse response and their control with CSTR as a case study." Indonesian Journal of Electrical Engineering and Computer Science 20, no. 1 (October 1, 2020): 89. http://dx.doi.org/10.11591/ijeecs.v20.i1.pp89-99.

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<span>In this paper the phenomenon of inverse response from systems was investigated and its transient response thoroughly analyzed. Inverse response is shown by non-minimum phase systems and some minimum phase systems. Transient analysis of these systems is lacking in literature A case study was done for a non-linear, non-minimum phase CSTR (Continuous Stirred Tank Reactor), which was identified and a novel optimized trajectory for temperature feed was synthesized, which is a non-linear dynamic constrained optimization problem solved using ACADO for a particular chemical reaction. Different control schemes were also implemented on other systems as well, which exibhit inverse responses, including model reference adaptive control. The finding shows that PID-ZN goes with the inverse response, is unable to suppress it and requires large control effort which can have serious hardware limitations. Robustness is another area where PID is lacking with these systems. MRAC shemes were able to overcome all these issues. For CSTR also, these findings hold true thus points at using advance stratigies in process control industries for maximzing product yield.</span>

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Che, Yanbo, Zihan Lv, Jianmei Xu, Jingjing Jia, and Ming Li. "Direct Method-Based Transient Stability Analysis for Power Electronics-Dominated Power Systems." Mathematical Problems in Engineering 2020 (January 4, 2020): 1–9. http://dx.doi.org/10.1155/2020/4295094.

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With the extensive application of power electronics interfaced nonsynchronous energy sources (NESs) in modern power systems, the system stability especially the transient stability is prominently deteriorated, and it is crucial to find a comprehensive and reasonably simple solution. This paper proposes a direct method-based transient stability analysis (DMTSA) method which concludes the key steps as follows: (1) the system modeling of Lyapunov functions using mixed potential function theory and (2) the stability evaluation of critical energy estimation. A voltage source converter- (VSC-) based HVDC transmission system is simulated in a weak power grid to validate the proposed DMTSA method under various disturbances. The simulation results verify that the proposed method can effectively estimate the transient stability with significant simplicity and generality, which is practically useful to secure the operation and control for power electronics-dominated power systems.

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Zhang, TieJun, John T. Wen, Yoav Peles, Juan Catano, Rongliang Zhou, and Michael K. Jensen. "Two-phase refrigerant flow instability analysis and active control in transient electronics cooling systems." International Journal of Multiphase Flow 37, no. 1 (January 2011): 84–97. http://dx.doi.org/10.1016/j.ijmultiphaseflow.2010.07.003.

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Parthasarathy, P. R., and V. Vijayalakshmi. "Transient Analysis of Multiple Unit Redundant Systems—A Continued Fraction Approach." Optimization 35, no. 2 (January 1995): 171–85. http://dx.doi.org/10.1080/02331939508844138.

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Wan, Wuyi, Boran Zhang, Xiaoyi Chen, and Jijian Lian. "Water Hammer Control Analysis of an Intelligent Surge Tank with Spring Self-Adaptive Auxiliary Control System." Energies 12, no. 13 (July 1, 2019): 2527. http://dx.doi.org/10.3390/en12132527.

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The water hammer can cause great risks in water supply pipe systems. A surge tank is a kind of general water hammer control device. In order to improve the behavior of the surge tank, a self-adaptive auxiliary control (SAC) system was proposed in this paper. The system can optimize the response of the surge tank according to the transient pressure. The numerical model and the matched boundary conditions were established to simulate the improved surge tank and optimize the SAC system. Then, various transient responses were simulated by the proposed model with different parameters set. The proposed system is validated by comparing the water hammer process in a river-pipe-valve (RLV) system with and without SAC. The results show that the SAC can greatly improve the water hammer control of the pipeline and the water level oscillation of the surge tank. With the SAC system, the required vertical size of the surge tank can be significantly reduced with the desired water hammer control function.

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Li, Huanhuan, Diyi Chen, Beibei Xu, Silvia Tolo, and Edoardo Patelli. "Dynamic analysis of multi-unit hydropower systems in transient process." Nonlinear Dynamics 90, no. 1 (July 21, 2017): 535–48. http://dx.doi.org/10.1007/s11071-017-3679-7.

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Domijan, A., and M. V. Emami. "State space relay modeling and simulation using the ElectroMagnetic Transients Program and its transient analysis of control systems capability." IEEE Transactions on Energy Conversion 5, no. 4 (1990): 697–702. http://dx.doi.org/10.1109/60.63142.

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Tamrakar, Ujjwol, Dipesh Shrestha, Naresh Malla, Zhen Ni, Timothy Hansen, Indraman Tamrakar, and Reinaldo Tonkoski. "Comparative Analysis of Current Control Techniques to Support Virtual Inertia Applications." Applied Sciences 8, no. 12 (December 19, 2018): 2695. http://dx.doi.org/10.3390/app8122695.

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The rapid transition towards an inverter-dominated power system has reduced the inertial response capability of modern power systems. As a solution, inverters are equipped with control strategies, which can emulate inertia by exchanging power with the grid based on frequency changes. This paper discusses the various current control techniques for application in these systems, known as virtual inertia systems. Some classic control techniques like the proportional-integral, the proportional-resonant, and the hysteresis control are presented first, followed by the design and discussion of two more advanced control techniques based on model prediction and machine learning, respectively. MATLAB/Simulink-based simulations are performed, and results are presented to compare these control techniques in terms of harmonic performance, switching frequency, and transient response.

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Yang, W. C., J. M. Glidewell, W. E. Tobler, and G. K. Chui. "Dynamic Modeling and Analysis of Automotive Multi-Port Electronic Fuel Delivery System." Journal of Dynamic Systems, Measurement, and Control 113, no. 1 (March 1, 1991): 143–51. http://dx.doi.org/10.1115/1.2896341.

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A dynamic model of a multi-port electronic fuel injection system, capable of analyzing fast fluid transients in the fuel, is presented. The model consists of distributed parameter models for fuel lines and lumped parameter models for the fuel pump, pressure regulator and injectors. Modal approximation is used to model fuel lines. An experimental test bench has been established, and comparison of simulation and experimental results shows excellent agreement in transient characteristics. Using this experimentally verified model, the effects of injector clogging and vapor in the fuel rail on pressure transients are examined. A bond graph model of the total system is presented to identify the proper formulation of each subsystem model.

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Chen, Qian, Yossi Chait, and C. V. Hollot. "Analysis of Reset Control Systems Consisting of a FORE and Second-Order Loop1." Journal of Dynamic Systems, Measurement, and Control 123, no. 2 (February 16, 2001): 279–83. http://dx.doi.org/10.1115/1.1367335.

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Reset controllers consist of two parts—a linear compensator and a reset element. The linear compensator is designed, in the usual ways, to meet all closed-loop performance specifications while relaxing the overshoot constraint. Then, the reset element is chosen to meet this remaining step-response specification. In this paper, we consider the case when such linear compensation results in a second-order (loop) transfer function and where a first-order reset element (FORE) is employed. We analyze the closed-loop reset control system addressing performance issues such as stability, steady-state response, and transient performance.

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Chan, M., and A. Postula. "Transient analysis of bang–bang phase locked loops." IET Circuits, Devices & Systems 3, no. 2 (April 1, 2009): 76–82. http://dx.doi.org/10.1049/iet-cds.2008.0119.

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Polach, Tadeja, Dejan Slovenc, Jure Jazbinšek, Ivica Bašić, and Luka Štrubelj. "Analysis of Manual Reactor Trip of NEK NPP in APROS Computer Code." Journal of Energy - Energija 65, no. 3-4 (June 24, 2022): 90–101. http://dx.doi.org/10.37798/2016653-4116.

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The Slovenian Krško Nuclear Power Plant (NEK) model was built in using APROS - Advanced PROcess Simulation environment. The basis for the this model was the RELAP5/MOD3.3 Engineering Handbook, the model was updated to the 26th cycle and also includes the upflow conversion modification. A detailed model nodalisation was created for each system and every system was separately validated. The current model covers the primary circuit with the core kinetics model, the secondary circuit and their control systems. The steady state of the APROS NEK model already having been validated, the plan now is to validate the model for some transients and design basis accidents. In this article the plant behaviour after the manual reactor trip is analysed in detail. Two scenarios of the manual reactor trip transient are performed, where either the Main Steam Isolation Valve (MSIV) closes after 60s – case A, or remains open – case B. After the manual reactor trip from the 100% power, the control system signal actuations and their times were followed and then the responses of different affected systems were being observed. All those recorded values were then compared with the identical transient performed on the similar NEK model with the RELAP5/MOD3.3 system code. This procedure allowed to bring the current APROS NEK model one step forward towards being assured to have accurate calculations.

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Yingjie, Tan, Xu Min, Guo Zuogang, Lei Jinyong, Yuan Zhiyong, and Zhou Changcheng. "Research on Reduced-Order Modeling of Droop Controlled Inverter Suitable for Analysis of Transient Characteristics." E3S Web of Conferences 256 (2021): 01041. http://dx.doi.org/10.1051/e3sconf/202125601041.

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Under the background of a large number of converters connected to the power grid, the converter’s weak overcurrent capability and poor anti-interference ability bring challenges and hidden dangers to the transient safe and stable operation of the power grid. It is urgent to carry out the transient characteristics analysis of the converter. Numerical simulation calculation is an important means to study transient characteristics. However, numerical simulation is time-consuming and poor in generality, which greatly limits the study of transient characteristics of systems with multiple converters. In this paper, the vertical control is the object, and the inverter reduced-order simplified model suitable for different transient stability problems is studied. First, a full-order model of the droop control inverter is established, and the singular perturbation method is used to complete the extraction of system characteristic roots and the analysis of participating factors. Then, according to the droop control of the inverter’s power angle, voltage, and frequency transient response process, accuracy and rapidity are selected as the goals, and a reduced-order simplified model suitable for different transient stability analysis is obtained. The transient characteristic analysis of the numerical simulation of the converter system provides a reduced order reference.

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Hu, Qi, Yiyong Xiong, Chenruiyang Liu, Guangyu Wang, and Yanhong Ma. "Transient Stability Analysis of Direct Drive Wind Turbine in DC-Link Voltage Control Timescale during Grid Fault." Processes 10, no. 4 (April 15, 2022): 774. http://dx.doi.org/10.3390/pr10040774.

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Transient stability during grid fault is experienced differently in modern power systems, especially in wind-turbine-dominated power systems. In this paper, transient behavior and stability issues of a direct drive wind turbine during fault recovery in DC-link voltage control timescale are studied. First, the motion equation model that depicts the phase and amplitude dynamics of internal voltage driven by unbalanced active and reactive power is developed to physically depict transient characteristics of the direct drive wind turbine itself. Considering transient switch control induced by active power climbing, the two-stage model is employed. Based on the motion equation model, transient behavior during fault recovery in a single machine infinite bus system is studied, and the analysis is also divided into two stages: during and after active power climbing. During active power climbing, a novel approximate analytical expression is proposed to clearly reveal the frequency dynamics of the direct drive wind turbine, which is identified as approximate monotonicity at excitation of active power climbing. After active power climbing, large-signal oscillation behavior is concerned. A novel analysis idea combining time-frequency analysis based on Hilbert transform and high order modes is employed to investigate and reveal the nonlinear oscillation, which is characterized by time-varying oscillation frequency and amplitude attenuation ratio. It is found that the nonlinear oscillation and even stability are related closely to the final point during active power climbing. With a large active power climbing rate, the nonlinear oscillation may lose stability. Simulated results based on MATLAB® are also presented to verify the theoretical analysis.

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