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Journal articles on the topic 'System-active approach'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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1

Avramenko, Victor Vasilevich. "System-active approach in learning German grammar." Вестник Шадринского государственного педагогического университета, no. 2 (2021): 10–13. http://dx.doi.org/10.52772/25420291_2021_2_10.

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2

Nimdia, Kirit, and Balasubrahmanya Balakrishna. "Batch Job Active-Active Resiliency System and Method." International Journal of Computer Science and Mobile Computing 13, no. 5 (2024): 89–99. http://dx.doi.org/10.47760/ijcsmc.2024.v13i05.008.

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This manuscript presents a robust solution for orchestrating batch job workflows in an active-active resiliency mode across multiple regions. The proposed system abstracts the complexities of job and step/task state management, provides automated and customizable retries, and ensures auditability and observability. The system maintains operational continuity and fault tolerance, leveraging lock marker files and a configurable scheduler, even during regional failures. This approach addresses the challenges of asynchronous workflow management, offering enhanced visibility, control, and efficiency in processing batch jobs.

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3

Afanaseva, I. "TO THE QUESTION OF TEACHING A FUNCTIONAL METHOD FOR SOLVING EQUATIONS AND INEQUALITIES IN THE IMPLEMENTATION OF A SYSTEM-ACTIVITY APPROACH." Scientific heritage, no. 93 (July 22, 2022): 53–55. https://doi.org/10.5281/zenodo.6882457.

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The article introduces the concept of the system-activity approach, describes the system-activity approach and its components main ideas. The conditions of teaching the functional method of solving equations and inequalities of the school mathematics course in the implementation of the system-activity approach are determined.

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Sharma, Aakriti, Anusha Adhikari, Bibek Adhikari, Pratik Pandey, and Indraman Tamrakar. "Active Cell Balancing Approach for Efficient Battery Management System." KEC Journal of Science and Engineering 8, no. 1 (2024): 23–26. http://dx.doi.org/10.3126/kjse.v8i1.69260.

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With the increasing concern for EV and its battery management system, the effective life and performance of li-ion battery is of utmost importance. The battery cells should be frequently equalized in order to increase the lifetime of battery pack. The conventional method of cell balancing is passive cell balancing where excess energy from cell is dissipated in the form of heat until all the cells are equally charged, causing thermal issues and efficiency in the battery pack. This paper proposes a novel approach for improving the efficiency of battery management systems through active cell balancing using the Kalman filter algorithm thereby overcoming the drawbacks of passive cell balancing. The goal of this paper is to develop a system that can extend the lifespan of batteries by ensuring that each cell is charged and discharged evenly. The proposed system includes an active balancing circuit that uses the Kalman filter algorithm to estimate the state of each battery cell and determine the optimal charging and discharging currents.

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Altinoz, O. Tolga. "Multiobjective PID controller design for active suspension system: scalarization approach." An International Journal of Optimization and Control: Theories & Applications (IJOCTA) 8, no. 2 (2018): 183–94. http://dx.doi.org/10.11121/ijocta.01.2018.00399.

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In this study, the PID tuning method (controller design scheme) is proposed for a linear quarter model of active suspension system installed on the vehicles. The PID tuning scheme is considered as a multiobjective problem which is solved by converting this multiobjective problem into single objective problem with the aid of scalarization approaches. In the study, three different scalarization approaches are used and compared to each other. These approaches are called linear scalarization (weighted sum), epsilon-constraint and Benson’s methods. The objectives of multiobjective optimization are selected from the time-domain properties of the transient response of the system which are overshoot, rise time, peak time and error (in total there are four objectives). The aim of each objective is to minimize the corresponding property of the time response of the system. First, these four objective is applied to the scalarization functions and then single objective problem is obtained. Finally, these single objective problems are solved with the aid of heuristic optimization algorithms. For this purpose, four optimization algorithms are selected, which are called Particle Swarm Optimization, Differential Evolution, Firefly, and Cultural Algorithms. In total,twelve implementations are evaluated with the same number of iterations. In this study, the aim is to compare the scalarization approaches and optimization algorithm on active suspension control problem. The performance of the corresponding cases (implementations) are numerically and graphically demonstrated on transient responses of the system.

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Rigaud, B., Y. Shi, N. Chauveau, and J. P. Morucci. "Experimental acquisition system for impedance tomography with active electrode approach." Medical & Biological Engineering & Computing 31, no. 6 (1993): 593–99. http://dx.doi.org/10.1007/bf02441807.

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Ahemad, Noormahamad Nadaf*1 Vaibhav Gaikwad2 Dhiraj More1 Mustafa Bashir Mujavar1 Pavanraje Dhokate1. "An Advance Drug Delivery Approach: Osmotic Pump." International Journal of Pharmaceutical Sciences 3, no. 3 (2025): 385–97. https://doi.org/10.5281/zenodo.14989518.

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The past few decades were challenging for the pharmaceutical industry to bring the new active pharmaceutical ingredients APIs in market. Due to the multiple challenges the novel drug delivery approach were increased. From the numerous novel drug delivery systems one of the definitive approach is Osmotic drug delivery system. Osmotic drug delivery system is a type of controlled drug release and brings relief from local gastrointestinal or systemic toxicity. The active drug molecule is present in the core compartment of the osmotic pump. Osmotic pump utilized in oral administration and implantation procedures. It is much easier to develop a novel drug delivery system in comparison to bring a new chemical entity in world. Novel drug delivery approach can increase market value of an old chemical entity by allowing it to increase its lifespan in market and conflicting to other chemical entity. 

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Miftakul Amin, M., Andino Maseleno, Shankar K, Eswaran Perumal, R. M Vidhyavathi, and Lakshmanaprabu SK. "Active Database System Approach and Rule Based in the Development of Academic Information System." International Journal of Engineering & Technology 7, no. 2.26 (2018): 95. http://dx.doi.org/10.14419/ijet.v7i2.26.14361.

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Active database system is a database system which is capable of generating a certain action automatically if it detects an event that meets certain conditions. The existence of Event Condition Action (ECA) rules and functional components such as triggers, stored procedures, and stored functions that are owned by active database system make the database system has the ability to automatically monitor input and output data. Separation of ECA rules components in the database with the application program will also facilitate the development of information systems. This research applies active database system in academic information system, so that academic business rules can be planted in database software and be able to produce the right solution automatically. The addition of active database system components to the database software makes procedures such as subject distribution, study plans, academic leave, values, thesis defense and other processes can be monitored by the system automatically. This can be done because between applications and databases use the model driven approach parameters to communicate with each other. The results of this research prove that a database is not only has function as a container of data, but can control the information system actively, this is caused by the logic of programs that are generally planted in the application layer that can be moved and planted in the database software.

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9

Gawthrop, Peter J., Simon A. Neild, and David J. Wagg. "Semi-active damping using a hybrid control approach." Journal of Intelligent Material Systems and Structures 23, no. 18 (2012): 2103–16. http://dx.doi.org/10.1177/1045389x12436734.

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In this article, a hybrid control framework is used to design semi-active controllers for vibration reduction. It is shown that the semi-active skyhook damper, typically used for vibration reduction, can be recast in the framework of an event-driven intermittent controller. By doing this, we can then exploit the well-developed techniques associated with hybrid control theory to design the semi-active control system. Illustrative simulation examples are based on a 2 degree-of-freedom system, often used to model the dynamics of a quarter car body model. The simulation results demonstrate how hybrid control design techniques can improve the overall performance of the semi-active control system.

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Sijakovic, Nenad, Aleksandar Terzic, Georgios Fotis, et al. "Active System Management Approach for Flexibility Services to the Greek Transmission and Distribution System." Energies 15, no. 17 (2022): 6134. http://dx.doi.org/10.3390/en15176134.

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New methods for state estimation are required due to the complexity of the topology of transmission and distribution systems, and the predictability in the management of prosumer dispatch. This paper describes a pilot project in Greece that, in accordance with OneNet’s architecture, addresses the challenges of congestion and balancing management that system operators face due to the high penetration of renewable energy sources. The respective data requirements and the IT/OT environment are described, as well as the interconnections among the various modules and functionalities. Available resources of the grid’s flexibility are identified, and the implementation of an integrated monitoring system based on efficient forecasting of volatile generation and demand is addressed. Congestion management and frequency and voltage control are in the center of interest of the demonstrator where, in close collaboration with system operators, respective network models are being developed.

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Covello, Fabio. "Application of electrical propulsion for an active debris removal system: a system engineering approach." Advances in Space Research 50, no. 7 (2012): 918–31. http://dx.doi.org/10.1016/j.asr.2012.05.026.

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Kiyanfar, Mohammad, Mojtaba Ghodsi, and Adel Akbarimajd. "Implementation of a Semi-Active Parking Assistance System." Advanced Materials Research 433-440 (January 2012): 6717–21. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.6717.

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This paper presents a novel approach to solve semi-active non-holonomic vehicle-parking assistant problem. This system can be automatically drive a vehicle and can be used during day or and night. A robust algorithm for this system is developed and embedded controller hardware is designed and programmed to parallel parking maneuver. In this approach, infrared distance sensor is mounted on the car to find parking space, localize the vehicle position and avoid obstacles. Experimental and simulation results show good performance in the algorithm for parking system under parallel parking. Parking maneuver is safer and efficient through using these advanced safety techniques for parking. Simulation results obtained with the presented system are applied for semi-active parking assistance system.

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Cakit, Erman, and Waldemar Karwowski. "Assessing the Relationship between Economic Factors and Adverse Events in an Active War Theater Using Fuzzy Inference System Approach." International Journal of Machine Learning and Computing 5, no. 3 (2015): 252–57. http://dx.doi.org/10.7763/ijmlc.2015.v5.516.

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14

Schwarzgruber, Thomas, Engelbert Grünbacher, and Luigi del Re. "Performance oriented tuning approach for a nonlinear controlled active suspension system." IFAC Proceedings Volumes 43, no. 14 (2010): 891–96. http://dx.doi.org/10.3182/20100901-3-it-2016.00184.

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15

Janocha, H., and B. Liu. "Simulation approach and causality evaluation for an active noise control system." IEE Proceedings - Control Theory and Applications 145, no. 4 (1998): 423–26. http://dx.doi.org/10.1049/ip-cta:19982113.

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16

Do, N. C., S. M. Bae, and I. J. Choi. "Constraint maintenance in engineering design system: An active object-oriented approach." Computers & Industrial Engineering 33, no. 3-4 (1997): 643–47. http://dx.doi.org/10.1016/s0360-8352(97)00212-x.

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17

Abdellahi, E., D. Mehdi, R. Ramirez Mendoza, and M. M'saad. "H∞ with Reference Model for Active Suspension System: An LMI Approach." IFAC Proceedings Volumes 34, no. 1 (2001): 319–24. http://dx.doi.org/10.1016/s1474-6670(17)34417-8.

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18

Formentin, Simone, Carlo Novara, Sergio M. Savaresi, and Mario Milanese. "Active Braking Control System Design: The D$^{\bf 2}$ -IBC Approach." IEEE/ASME Transactions on Mechatronics 20, no. 4 (2015): 1573–84. http://dx.doi.org/10.1109/tmech.2015.2412172.

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19

Sellami, Abderrahmene, Dhia Mzoughi, and Abdelkader Mami. "Robust Diagnosis of Vehicular Active Suspension System Using Bond Graph Approach." International Journal of Engineering & Technology 7, no. 3.13 (2018): 61. http://dx.doi.org/10.14419/ijet.v7i3.13.16325.

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Diagnostic systems play a major role in the safety of industrial systems and the availability of its equipment. Rapid detection (as soon as possible) to the operator of the detected deviations (defects) in relation to the expected nominal behavior is fundamental for the implementation of preventive and corrective actions on industrial systems.These industrial systems are governed by several physical phenomena and various technological components, which is why the Bond Graph tool, based on an energy and multi-physical analysis, is well suited. In this article, we will discuss the problem of diagnosing an active suspension system of a vehicle by presenting diagnostic methods. Then, we introduce the bond graph tool for the robust diagnosis of the system. Finally, the extension of the deterministic models presented to models integrating uncertain elements (Fractional linear transformations LFT) and the generation of robust analytical redundancy relationships are also detailed.

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20

Álvarez-Arroyo, César, and Barrios Lázaro Alvarado. "Two-Level Optimisation and Control Strategy for Unbalanced Active Distribution Systems Management." IEEE Access 8 (October 28, 2020): 197992–8009. https://doi.org/10.1109/ACCESS.2020.3034446.

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This article proposes a new approach to the operation of unbalanced Active Distribution Systems (ADS) using an economic dispatch optimisation model for Active Distribution Systems Management (ADSM). The model proposes a two-level control strategy. The rst one poses an optimisation problem with the objective of minimising total active power losses in the ADS and the second one proposes an algorithm that controls the position of the taps of three-phase on-load tap-changer (OLTC) transformers to ensure compliance with the technical constraints imposed by the Distribution System Operator (DSO). The optimisation problem is solved by MATLABr and DIgSILENT PowerFactoryr for power systems static simulations. This paper includes a novel peer to peer communication framework between MATLABr/DIgSILENTr.The control and optimisation strategy is validated on the IEEE 34-Node Distribution Test Feeder. This network incorporates balanced and unbalanced three-phase loads, single-phase loads in the different phases, and two-phase loads. In this scientic paper, photovoltaic (PV) and wind power generation (WT) have been integrated to test feeder operation, with the support of battery energy storage systems (BESS). The correct operation of the proposed ADSM is demonstrated using numerical simulation on ve scenarios considering several congurations of the renewable generation units and the batteries. The strategy has also been validated in a more extensive distribution network, proving its good performance.

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21

Rao, Dr G. Venkateswara, and M. Rithvik. "An Ingenious Approach to Create Compassionate Teaching and Learning Environment." Journal of Engineering Education Transformations 36, no. 2 (2022): 161–68. http://dx.doi.org/10.16920/jeet/2022/v36i2/22163.

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Abstract :The topology of Teaching is changing its wings from a vibrant classroom to an ingenious active-based classroom. In this context, up-gradation to build an adaptable Covid-19 system that revamps the traditional way of Teaching tautology to a generic active learning-based system has been essential aid in the topology of Teaching and Learning mechanisms. A conventional adaptive active learning system that justifies the topology needs and pedagogy builds a passionate Teaching and Learning environment. This paper illustrates a pedagogy selected to outline the OSI Model in the Computer Networks and vibrant the deliberate classroom environment to an active learning classroom environment that inspires the classroom teaching form to a compassionate Tautology of Active Learning environment. The literature suggests many ways to imbibe a concept, but literature misrecollects the pedagogy's selection according to the topology. Keywords : Topology, Tautology, Vibrant, Active Learning environment.

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22

Kim, Cheol-Soon, and Chong-Won Lee. "Isotropic Optimal Control of Active Magnetic Bearing System." Journal of Dynamic Systems, Measurement, and Control 118, no. 4 (1996): 721–26. http://dx.doi.org/10.1115/1.2802348.

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As a new rotor control scheme, isotropic control of weakly anisotropic rotor bearing system in complex state space is proposed, which utilizes the concepts on the eigenstructure of the isotropic rotor system. Advantages of the scheme are that the controlled system always retains isotropic eigenstructure, leading to circular whirling due to unbalance and that it is efficient for control of unbalance response. And the system analysis and controller design becomes simple and yet comprehensive since the order of the matrices treated in the complex domain approach is half of that in the real approach. The control scheme is applied to a rigid rotor-active magnetic bearing system which is digitally controlled and the control performance is investigated experimentally in relation to unbalance response and control energy. It is found that the isotropic optimal control method, which essentially eliminates the backward unbalance response component, is more efficient than the conventional optimal control in that it gives smaller major whirl radius and yet it often requires less control effort.

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23

Nigora, Jumaniyozova Khudayberdiyevna. "SYSTEMATIC-ACTIVE APPROACH METHOD IN CHEMISTRY LESSONS." SCIENCE AND INNOVATION IN THE EDUCATION SYSTEM 2, no. 1 (2023): 67–70. https://doi.org/10.5281/zenodo.7529115.

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Huynh, Van Van, and Minh Hoang Quang Tran. "Integral Sliding Mode Control Approach for 3-Pole Active Magnetic Bearing System." Applied Mechanics and Materials 829 (March 2016): 128–32. http://dx.doi.org/10.4028/www.scientific.net/amm.829.128.

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In this paper, a new integral sliding mode control scheme is designed for the 3-pole active magnetic bearing system. First, a new integral sliding surface is designed such that the 3-pole active magnetic bearing system in the sliding mode is asymptotically stable under certain conditions. Then, an adaptive controller is designed to solve the unknown upper bound of matched uncertainty and guarantee the reachability of the integral sliding surface. Finally, the performance of the proposed integral sliding mode controller is applied to 3-pole active magnetic bearing system to demonstrate the efficacy of the proposed method.

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Pujol-Vázquez, Gisela, Alessandro N. Vargas, Saleh Mobayen, and Leonardo Acho. "Semi-Active Magnetic Levitation System for Education." Applied Sciences 11, no. 12 (2021): 5330. http://dx.doi.org/10.3390/app11125330.

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This paper describes how to construct a low-cost magnetic levitation system (MagLev). The MagLev has been intensively used in engineering education, allowing instructors and students to learn through hands-on experiences of essential concepts, such as electronics, electromagnetism, and control systems. Built from scratch, the MagLev depends only on simple, low-cost components readily available on the market. In addition to showing how to construct the MagLev, this paper presents a semi-active control strategy that seems novel when applied to the MagLev. Experiments performed in the laboratory provide comparisons of the proposed control scheme with the classical PID control. The corresponding real-time experiments illustrate both the effectiveness of the approach and the potential of the MagLev for education.

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Sathishkumar, Palanisamy, Jeyaraj Jancirani, and John Dennie. "An Approach on Performance Comparison of Quarter Car Suspension System." Advanced Materials Research 984-985 (July 2014): 629–33. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.629.

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The present article introduces an approach that combines passive and active elements to improve the ride and passenger comfort. The main aim of vehicle suspension system should isolate the vehicle body from road unevenness for maintaining ride and passenger comfort. The ride and passenger comfort is improved by reducing the car body acceleration caused by the irregular road surface. The vehicle body along with the wheel system is modelled as two degrees of freedom one fourth of car model. The model is tested on road bump with severe peak amplitude excitations. In the conclusion, a comparison of active, semi-active and passive suspension is shown using MATLAB simulations.

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Barhoum, Tarek. "COMPARATIVE STUDY BETWEEN EXTENDED ADAPTIVE NEURO FUZZY INFERENCE SYSTEM (EANFIS) AND CO-ACTIVE ADAPTIVE NEURO FUZZY INFERENCE SYSTEM (CANFIS) IN CONTROLLING FULL CAR ACTIVE SUSPENSION SYSTEM." INTERNATIONAL JOURNAL OF CURRENT RESEARCH 8, no. 0975-833X (2016): 36921–30. https://doi.org/10.5281/zenodo.15353284.

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This Paper presents two adaptive vehicle suspension control methods, which significantly improvethe performance of mechatronic suspension systems in full car model by absorbing shocks caused bybumpy roads and preventing vibrations from reaching the cockpit and providing stability andcoherence required. The first control approach is an extension to the Adaptive Neuro-Fuzzy InferenceSystem (ANFIS) called Extended adaptive Neuro fuzzy inference system (EANFIS). The secondcontrol approach is a special type of multi-inputs multi-outputs ANFIS model called Co-Activeadaptive Neuro fuzzy inference system (CANFIS). MATLAB Simulink has used to build controllersand the full vehicle active suspension model with seven degrees of freedom. Three types ofdisturbances have been applied individually as excitations to test the robustness of the proposedcontrollers. In addition, a comparison between EANFIS controller, CANFIS controller and open loopmodel (passive suspension) has made with the three types of disturbances

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28

Gorbaneva, Olga, and Guennady Ougolnitsky. "Sustainability of Intertwined Supply Networks: A Game-Theoretic Approach." Games 13, no. 3 (2022): 35. http://dx.doi.org/10.3390/g13030035.

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A formal game-theoretic model of an intertwined supply network, in full and simplified versions, is proposed. Conditions for the sustainable development of an active system are presented in general form and then specified to the class of intertwined supply networks. As an illustration, a concise example of the dynamic Cournot duopoly and a detailed example of the model of Social and Private Interests Coordination Engines (SPICE-model) for a marketing network are considered and analytically investigated and sustainability conditions are established. An important conclusion is that the sustainable development of the active system is possible only under the viability conditions satisfied simultaneously with coordinating the interests of all active agents of the system.

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29

Batkovskiy, M., P. Kravchuk, and E. Kuznetsova. "The process-oriented approach to the management of innovative enterprises." Bulletin of Science and Practice 5, no. 3 (2019): 327–33. https://doi.org/10.33619/2414-2948/40/39.

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The dynamic development of the market for innovative goods and services, as well as the growth of competition, necessitate the search for new methods to improve the management of innovative production. One of them is management based on a process-oriented approach, which is based on identifying business processes in an innovatively active enterprise and creating a management system that should ensure the growth of its management efficiency. This approach to the management of a modern enterprise is an important factor in increasing its competitiveness and business efficiency while achieving maximum resource saving and minimizing costs. Therefore, issues of the in-depth study of the process-oriented approach and business processes of the enterprise, their structural elements and the nature of the interaction are of particular relevance. In modern world practice, it is planned to introduce the standards of a process-oriented approach into the work of enterprises, which is also relevant for Russian enterprises. It is on the process approach that the requirements of international quality management standards ISO, which are actively implemented in the activities of various institutions and organizations of our state, are based. This article is devoted to the analysis of the specifics of solving this problem as applied to innovatively active enterprises. It examines the nature and main aspects of the process-oriented approach to the management of innovatively active enterprises.

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LUCIANO, CARL S., MATTHEW W. YOUNG, and ROBIN R. PATTERSON. "Bacteriophage: A Model System for Active Learning." Microbiology Education 3, no. 1 (2002): 1–6. http://dx.doi.org/10.1128/me.3.1.1-6.2002.

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Although bacteriophage provided a useful model system for the development of molecular biology, its simplicity, accessibility, and familiarity have not been fully exploited in the classroom. We describe a student-centered laboratory course in which student teams selected phage from sewage samples and characterized the phage in a semester-long project that modeled real-life scientific research. The course used an instructional approach that included active learning, collaboration, and learning by inquiry. Cooperative student teams had primary responsibility for organizing the content of the course, writing to learn using a journal article format, involving the entire group in shared laboratory responsibilities, and applying knowledge to the choice of new experiments. The results of student evaluations indicated a high level of satisfaction with the course. Our positive experience with this course suggests that phage provides an attractive model system for an active-learning classroom.

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Neubauer, Philipp, Johannes Tschesche, Joachim Bös, Tobias Melz, and Holger Hanselka. "An active-system approach for eliminating the wolf note on a cello." Journal of the Acoustical Society of America 143, no. 5 (2018): 2965–74. http://dx.doi.org/10.1121/1.5037467.

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Fu, Hao, and Xiao-Ping Zhang. "Market Equilibrium in Active Distribution System With $\mu $ VPPs: A Coevolutionary Approach." IEEE Access 5 (2017): 8194–204. http://dx.doi.org/10.1109/access.2017.2691316.

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Ho, Chung-Ying, Lichuan Liu, Kuo-Kai Shyu, Sen M. Kuo, and Cheng-Yuan Chang. "Time-division multiple reference approach for multiple-channel active noise control system." Journal of Sound and Vibration 495 (March 2021): 115922. http://dx.doi.org/10.1016/j.jsv.2020.115922.

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34

Ramirez-Mendoza, R. A., M. Nawarecki, O. Sename, L. Dugard, and M. M’Saad. "An Optimal Control Approach for the Design of an Active Suspension System." IFAC Proceedings Volumes 31, no. 1 (1998): 43–48. http://dx.doi.org/10.1016/s1474-6670(17)42175-6.

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35

Park, Kwan-Soon, and Seung-Yong Ok. "Fuzzy gain-tuning approach for active control system adaptable to physical constraints." KSCE Journal of Civil Engineering 19, no. 5 (2014): 1468–74. http://dx.doi.org/10.1007/s12205-014-0334-4.

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36

Nyati, Abha. "A Decisive Filtering Selection Approach For Improved Performance Active Noise Cancellation System." IOSR Journal of Electronics and Communication Engineering 7, no. 4 (2013): 83–87. http://dx.doi.org/10.9790/2834-0748387.

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37

Cheng, P. T., and T. L. Lee. "Distributed Active Filter Systems (DAFSs): A New Approach to Power System Harmonics." IEEE Transactions on Industry Applications 42, no. 5 (2006): 1301–9. http://dx.doi.org/10.1109/tia.2006.880856.

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38

Alam, Mushfiqul, Martin Hromcik, and Tomas Hanis. "Active gust load alleviation system for flexible aircraft: Mixed feedforward/feedback approach." Aerospace Science and Technology 41 (February 2015): 122–33. http://dx.doi.org/10.1016/j.ast.2014.12.020.

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39

Moradijoz, M., M. Parsa Moghaddam, and M. R. Haghifam. "A flexible active distribution system expansion planning model: A risk-based approach." Energy 145 (February 2018): 442–57. http://dx.doi.org/10.1016/j.energy.2017.12.160.

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40

Zhang, Zhao, and Xiao He. "Fault-Structure-Based Active Fault Diagnosis: A Geometric Observer Approach." Energies 13, no. 17 (2020): 4475. http://dx.doi.org/10.3390/en13174475.

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Fault diagnosis techniques can be classified into passive and active types. Passive approaches only utilize the original input and output signals of the system. Because of the small amplitudes, the characteristics of incipient faults are not fully represented in the data of the system, so it is difficult to detect incipient faults by passive fault diagnosis techniques. In contrast, active methods can design auxiliary signals for specific faults and inject them into the system to improve fault diagnosis performance. Therefore, active fault diagnosis techniques are utilized in this article to detect and isolate incipient faults based on the fault structure. A new framework based on observer approach for active fault diagnosis is proposed and the geometric approach based fault diagnosis observer is introduced to active fault diagnosis for the first time. Based on the dynamic equations of residuals, auxiliary signals are designed to enhance the diagnosis performance for incipient faults that have specific structures. In addition, the requirements that auxiliary signals need to meet are discussed. The proposed method can realize the seamless combination of active fault diagnosis and passive fault diagnosis. Finally, a numerical example is presented to demonstrate the effectiveness of the proposed approach, and it is indicated that the proposed method significantly improves the accuracy of the diagnosis for incipient faults.

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Beltran-Carbajal, Francisco, Antonio Valderrabano-Gonzalez, Antonio Favela-Contreras, Jose Luis Hernandez-Avila, Irvin Lopez-Garcia, and Ruben Tapia-Olvera. "An Active Vehicle Suspension Control Approach with Electromagnetic and Hydraulic Actuators." Actuators 8, no. 2 (2019): 35. http://dx.doi.org/10.3390/act8020035.

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An active vibration control approach from an online estimation perspective of unavailable feedback signals for a quarter-vehicle suspension system is introduced. The application of a new signal differentiation technique for the online estimation of disturbance trajectories due to irregular road surfaces and velocity state variables is described. It is assumed that position measurements are only available for active disturbance suppression control implementation. Real-time signal differentiation is independent of detailed mathematical models of specific dynamic systems and control force generation mechanisms. Active control forces can be supplied by electromagnetic or hydraulic actuators. Analytical and simulation results prove the effective and fast dynamic performance of the online signal estimation as well as a satisfactory active disturbance attenuation on a quarter-vehicle active suspension system.

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Mayar, Khalilullah, David G. Carmichael, and Xuesong Shen. "Stability and Resilience—A Systematic Approach." Buildings 12, no. 8 (2022): 1242. http://dx.doi.org/10.3390/buildings12081242.

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Stability and resilience are two crucial concepts to the proper functioning and understanding of the behavior of both natural and man-made systems exposed to perturbations and change. However, although the two have covered a similar territory within dynamic systems, the terminology and applications differ significantly. This paper presents a critical analysis of the two concepts by first collating the wealth of modern stability concept literature within dynamics systems and then linking it to resilience thinking, defined as adaptation where the system has the ability to respond perturbations and change through passive and active feedback structures. A lumped mass and simple pendulum, two simple linear and nonlinear dynamic systems following a state-space approach from modern control systems theory, are used to support the analysis and application. The research findings reveal that the two overarching categories of engineering resilience and socio-ecological resilience (extended ecological resilience) are in fact a reinvention of a closed-loop system dynamic stability with different types of active feedback mechanisms. Additionally, structural stability describes some vital aspects of social–ecological resilience such as critical thresholds where, under change, a system loses the ability to return to the starting form or move to another suitable form through active feedback mechanisms or direct management actions.

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Boulic, Léa, Pierluigi D’Acunto, Federico Bertagna, and Juan José Castellón. "Form-driven design of a bending-active tensile façade system." International Journal of Space Structures 35, no. 4 (2020): 174–90. http://dx.doi.org/10.1177/0956059920931021.

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This article highlights the design potentials of a recently proposed form-driven approach for bending-active tensile structures, in which the geometry of the actively bent elements can be directly defined without the recourse to a form-finding procedure. The approach is applied to the design of a lightweight sun-shading system that can be used to protect glazed building façades, and in which actively bent beams are restrained by pre-stressing strips. Other than structural requirements, the geometry of this hybrid structure is informed by functional and environmental considerations to prevent overheating and glare inside the building.

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Bennighof, J. K., and L. Meirovitch. "Active Vibration Control of a Distributed System With Moving Support." Journal of Vibration and Acoustics 110, no. 2 (1988): 246–53. http://dx.doi.org/10.1115/1.3269506.

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This paper is concerned with the problem of controlling the vibration of a distributed system with a support undergoing significant persistent motion. Because of practical considerations, the control is carried out by discrete actuators and sensors. The system is discretized by a new Rayleigh-Ritz approach in which the generalized coordinates represent actual displacements at a given number of points of the system. The control is separated into two parts, one designed to mitigate the effect of the moving support on the absolute motion of the system and the other designed to minimize the remaining absolute motion. A numerical example illustrating the approach is presented.

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Lee, Jeongwoo, Kwangseok Oh, and Kyongsu Yi. "A novel approach to design and control of an active suspension using linear pump control–based hydraulic system." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 5 (2019): 1224–48. http://dx.doi.org/10.1177/0954407019882223.

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This paper presents a novel design and control method of an active suspension system using a linear pump control–based hydraulic system for a cost-effective application. Various active suspension systems have been proposed and applied to vehicles due to its ability to improve ride comfort and handling performance even though these active suspension systems are not popular because of their complexity, high cost, heavyweight, and low power efficiency. A new type of active suspension actuator system was designed and validated herein based on the methods of actuator sizing and modified control scheme to address the aforementioned issues. System power capability has been analyzed under various dynamics and road conditions. Active suspension actuator components have been designed based on the results. The electro-hydraulic system is powered by a battery to reduce the energy consumption of the system; hence, it is operated by torque on demand. A double-acting linear hydraulic motor pump with a dual rack and pinion has been proposed for hydraulic force control with a simple on/off switch operation. The actuator force has been controlled by continuous linear motor pump displacement control via torque control using a three-phase synchronous brushless alternative current motor. Dynamic performance evaluation of the actuator system has been conducted using AMESIM and actual rig test. Active height and roll control algorithms for the enhancement of vehicle dynamics considering actuator dynamics have also been developed and validated through the rig and real vehicle tests. The evaluation results showed that the linear motor pump–based active suspension system performs as well as the previous complicated hydraulic active suspension system. The new active system proposed in this study was able to improve the vehicle dynamics using cost-effective actuation system significantly.

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Velesaca, Henry O., Patricia L. Suárez, Dario Carpio, and Angel Sappa. "Fruit Grading based on Deep Learning and Active Vision System." E3S Web of Conferences 532 (2024): 02008. http://dx.doi.org/10.1051/e3sconf/202453202008.

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This paper presents a low-cost computer vision-based solution to obtain the size of fruits without contact. It consists of a low-cost webcam and a cross-shaped laser beam rigidly assembled. The proposed approach acquires and processes the images in real-time. Due to the low computational cost of the proposed algorithm, a robust solution is obtained using a frame redundancy approach, which consists in processing several frames of the same scene and hence computing a robust estimation of the fruit size. The proposed solution is evaluated with different tropical fruits (e.g., banana, avocado, dragon fruit, mamey, papaya, and taxo). Obtained results show on mean average percentage error (MAPE) below 1.50% in the computed sizes.

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Aydın, Hatice, and Muciz Özcan. "Active Investment Planning in the Electricity Distribution System." AINTELIA SCIENCE NOTES 1, no. 2 (2022): 30–46. https://doi.org/10.5281/zenodo.8077656.

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The investment planning of the distribution network has evolved significantly the emergence of distributed energy resources (DEKs) with generated demand, rapid technological advanced in energy storage system, and rising consumer expectations. Nowadays, planning of active distribution systems (ADS) has been an important issue. There are numerous extensive literatures on ADS planning. This paper reviews the current state of distribution planning. Firstly, traditional investment plans made in Turkey and the approach to ADS are examined, ADS studies conducted in other countries, outputs and case studies are examined. Secondly, the effects of DECs on ADS planning are investigated. The features of ADS planning and the factors affecting ADS are outlined. Finally, it explores some aspects of ADS planning research, including planning within all the elements combined in ADS.

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Wei, Wei, Bowen Duan, Min Zuo, and Weicun Zhang. "Active disturbance rejection control for a piezoelectric nano-positioning system: A U-model approach." Measurement and Control 54, no. 3-4 (2021): 506–18. http://dx.doi.org/10.1177/00202940211000075.

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Both speed and accuracy are key issues in nano-positioning. However, hysteresis existing in piezoelectric actuators severely reduces the positioning speed and accuracy. In order to address the hysteresis, a U-model based active disturbance rejection control is proposed. Based on the linear active disturbance rejection control, a controlled plant is dynamically transformed to be pure integrators. Then, according to the U-model control, a common inversion is obtained and the controlled plant is converted to be “1.” By integrating advantages of both linear active disturbance rejection control and U-model control, the U-model based active disturbance rejection control does promote the reference tracking speed and accuracy. Stability and steady-state error of the close-loop system have been analyzed. Phase lag between the system output and the control input has been effectively eliminated, and the phase-leading advantage of the U-model based active disturbance rejection control has been confirmed. Experimental results show that the U-model based active disturbance rejection control is capable of achieving faster and more accurate positioning. Remarkable improvements and practical realization make the U-model based active disturbance rejection control more promising in nano-positioning.

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Kewley, Stephanie, and Mark Blandford. "The development of the active risk management system." Journal of Criminal Psychology 7, no. 3 (2017): 155–67. http://dx.doi.org/10.1108/jcp-10-2016-0034.

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Purpose The purpose of this paper is to detail the development and implementation process of a risk management tool that includes the assessment of static and dynamic factors, as well as factors that are both risk related and protective. Design/methodology/approach Active Risk Assessment System (ARMS) is a tool used to help criminal justice practitioners as they work to support the safe reintegration of those with sexual convictions back into the community. Findings The tool was developed for use by the police, probation and prison services across England and Wales and this paper outlines the following: the process adopted by the development team in designing the tool, the theoretical principles considered and adopted by the team, and a summary of the early evaluation and recommendations made. Originality/value This paper includes some further recommendations for both the developers of the tool and for the police service in England and Wales.

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Białas, Katarzyna. "Reverse Task of Mechanical System with Active Reduction of Vibration." Applied Mechanics and Materials 809-810 (November 2015): 640–45. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.640.

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The main purpose of this work is the presentation reverse task of mechanical systems including active elements. This reserve task is known as synthesis of mechanical system. In result of conducted synthesis was received structures and parameters of a discrete model meeting the defined requirements concerning the dynamic features of the system, in particular, the frequency spectrum. The presented approach i.e. a non-classical synthetic method applied in designing mechanical or mechatronical systems, one (as early as at the design and construction stage) may verify future systems. The aim of this paper is also analysis of obtained system to check relationship between basic system and active subsystem reduction vibrations. This active subsystem was consisted from electric elements. In this paper was used a non-classical method of polar graphs and their relationship with algebra of structural numbers. The use of such a method enables the analysis and synthesis of mechanical systems irrespective of the type and number of the elements of such a system. Active elements give better results (in compare with passive elements) in case of reduction of low frequency vibrations. Presented approach simplifies the process of selecting the dynamical parameters of systems in view of their dynamical characteristics. Thanks to the approach, introduced in this paper, can be conducted as early as during the designing of future functions of the system as well as during the construction of the system. Using method and obtained results can be value for designers of mechanical systems with elements reducing vibrations.

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