Relevant bibliographies by topics / Automatic control Computer simulation

Academic literature on the topic 'Automatic control Computer simulation'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Automatic control Computer simulation"

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PARKHOMENKO, S. G., and G. G. PARKHOMENKO. "SIMULATION OF AUTOMATIC CONTROL SYSTEMS OF TILLAGE UNITS." Traktory i sel hozmashiny 84, no. 1 (January 15, 2017): 22–31. http://dx.doi.org/10.17816/0321-4443-66258.

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The studies were performed to improve workflow of hydraulic automatic control systems of the tillage units. Tillage quality should not deteriorate. Working bodies of tillage machines have to be moved automatically. Automated devices can be separated into two groups: direct and indirect action. It is preferable to indirect action. The article presents analysis of automatic devices used into tillage machines. Automatic control systems can be hydraulic, electro-hydraulic and pneumatic. Mechanical systems are not effective. Hydraulic systems are cheaper electric and pneumatic. They provide best of energy and quality indicators of technological process of tillage. Automatic control systems are uses draft forces, hitch position, depth of the implement, speed, acceleration and other sensors. Method of computer modeling and optimization of hydraulic automatic control systems of tillage units was developed. Results of computer modeling of hydraulic automatic control systems help to select direction of improving quality and energy indicators of technological process of tillage. Optimized combine implement depth and draft control system of arable unit allow reducing deviation the draft force of the plow; deviation of the depth of plowing is equal to or smaller than agro-technical requirements. Deviation of the draft force was decreased to 13.5 % for deviation specific soil resistance - 20 %, depth of plowing - 0.21 m, deviation of the depth of plowing - 0.019 m (9 %). Deviation of the depth of plowing may be decreased to 0.010 m (4,8 %), but deviation of the draft force shell be increased up to 16.2%. Optimized hydraulic automatic control system of garden tiller with a trapezoidal mechanism leaves smaller untreated soil area from 1.37-1.46 times.
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Krawczyk, Mariusz, Cezary Jerzy Szczepanski, and Albert Zajdel. "Aircraft model for the automatic taxi directional control design." Aircraft Engineering and Aerospace Technology 91, no. 2 (February 4, 2019): 289–95. http://dx.doi.org/10.1108/aeat-01-2018-0025.

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PurposeThis paper aims to present a concept of an automatic directional control system of remotely piloted aerial system (RPAS) during the taxiing phase. In particular, it shows the initial stages of the control laws synthesis-mathematical model and simulation of taxiing aircraft. Several reasons have emerged in recent years that make the automation of taxiing an important design challenge including decreased safety, performance and pilot workload.Design/methodology/approachThe adapted methodology follows the model-based design approach in which the control system and the aircraft are mathematically modelled to allow control laws synthesis. The computer simulations are carried out to analyse the model behaviour.FindingsChosen methodology and modelling technique, especially tire-ground contact model, resulted in a taxiing aircraft model that can be used for directional control law synthesis. Aerodynamic forces and moments were identified in the wind tunnel tests for the full range of the slip angle. Simulations allowed to compute the critical speeds for different taxiway conditions in a 90° turn.Practical implicationsThe results can be used for the taxi directional control law synthesis and simulation of the control system. The computed critical speeds can be treated as a safety limits.Originality/valueThe taxi directional control system has not been introduced to the RPAS yet. Therefore, the model of taxiing aircraft including aerodynamic characteristics for the full range of the slip angle has a big value in the process of design and implementation of the future auto taxi systems. Moreover, computed speed safety limits can be used by designers and standards creators.
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Krawczyk, Mariusz, Cezary Jerzy Szczepanski, and Albert Zajdel. "Aircraft model for automatic taxi directional control system design." Aircraft Engineering and Aerospace Technology 91, no. 3 (March 4, 2019): 477–83. http://dx.doi.org/10.1108/aeat-06-2018-0161.

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Purpose This paper aims to present a concept of an automatic directional control system of remotely piloted aerial system (RPAS) during the taxiing phase. In particular, it shows the initial stages of the control laws synthesis – mathematical model and simulation of taxiing aircraft. Several reasons have emerged in recent years that make the automation of taxiing an important design challenge including decreased safety, performance and pilot workload. Design/methodology/approach The adapted methodology follows the model-based design approach in which the control system and the aircraft are mathematically modelled to allow control laws synthesis. The computer simulations are carried out to analyse the model behaviour. Findings Chosen methodology and modelling technique, especially tire-ground contact model, resulted in a taxing aircraft model that can be used for directional control law synthesis. Aerodynamic forces and moments were identified in the wind tunnel tests for the full range of the slip angle. Simulations allowed to compute the critical speeds for different taxiway conditions in a 90° turn. Practical implications The results can be used for the taxi directional control law synthesis and simulation of the control system. The computed critical speeds can be treated as safety limits. Originality/value The taxi directional control system has not been introduced to the RPAS yet. Therefore, the model of taxiing aircraft including aerodynamic characteristics for the full range of the slip angle has a big value in the process of design and implementation of the future auto taxi systems. Moreover, computed speed safety limits can be used by designers and standard creators.
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Li, Jinpeng. "Verification of the Improvement Effect of Artificial Intelligence Computer Control Technology on Electrical Automation Control." Advances in Multimedia 2022 (September 15, 2022): 1–14. http://dx.doi.org/10.1155/2022/2133735.

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In order to improve the effect of electrical automation control, this paper combines the intelligent computer technology to construct the electrical automation control system, explores the principle of the active disturbance rejection controller, and applies it to the induction motor vector control system. The active disturbance rejection controller estimates the state variables of the system and their changing trends in real time through the extended state observer, compensates them by nonlinear feedback method, and provides appropriate control signals. In addition, this paper builds the induction motor active disturbance rejection control system based on ant colony algorithm and conducts a lot of simulation analysis. The research shows that the electrical automatic control system based on the intelligent computer algorithm proposed in this paper has a good electrical automatic control effect.
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Ran, Sheng Yi, and Yu Shu Xiong. "Research on Elimination of Electric Power System Fault Based on Electrical Engineering Automatic Control Technology." Advanced Materials Research 898 (February 2014): 771–74. http://dx.doi.org/10.4028/www.scientific.net/amr.898.771.

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In this paper we introduce the computer software fault analysis system to the power fault detection system, and design power fault elimination system of electrical engineering automatic control, and do simulation and experimental study on the performance. When using the turbine blade of electric machinery to detect fault, we can get the automated troubleshooting displacement curve, and using computer simulation to get the electric mechanical stress distribution nephogram. To further verify the effectiveness of the algorithm, we test the frequencies for eight different units, and obtain eight different sets of five order fault diagnosis frequency, and draw the frequency spectrum distribution of frequency response. It provides the theory reference for the automation of power system fault exclusion.
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Xu, Jun Cai, Qing Wen Ren, and Hai Wei. "Automatic Control Model of Concrete Temperature." Advanced Materials Research 261-263 (May 2011): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.344.

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Most temperature control measurement methods are based on artificial work with anti-cracking during concrete construction. Automatic temperature control model proposed to implement computer control technology in concrete structural construction temperature control with anti-cracking to create an automatic concrete temperature control model. The model is based on temperature sensation technology, wireless transmission technology, water-pipe cooling technology, numerical simulation for the concrete structure of dynamic simulation and real-time monitoring. It can implement concrete inner temperature control to prevent temperature stress from producing cracks in concrete structure.
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Xie, Xiao Peng, and Yun Yi Li. "Computer Simulation Study Based on Matlab." Applied Mechanics and Materials 513-517 (February 2014): 3049–52. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.3049.

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This paper describes the use of one of the Matlab toolbox dynamic simulation tool Simulink simulation methods, and improve simulation speed, the simulation results analysis conducted in-depth elaboration. Also describes the use of SIMULINK simulation tools to achieve automatic control system modeling, analysis and design, simulation methods and Simulink-based video and image processing module sets into visualization, modular modeling idea.
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Lazimov, T., and R. Ahmadov. "Some Features Of Capacitor Banks Automatic Switching-Offs Computer Simulation." IFAC-PapersOnLine 51, no. 30 (2018): 632–35. http://dx.doi.org/10.1016/j.ifacol.2018.11.226.

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Agunov, Alexander, and Denis Sokolov. "OPERATING PERFORMANCE ANALYSIS OF ELEMENTS AND DEVICES OF TRAIN PROPULSIVE SYSTEMS AUTOMATION BY MEANS OF COMPUTER SIMULATION." Bulletin of scientific research results, no. 1 (March 17, 2018): 87–93. http://dx.doi.org/10.20295/2223-9987-2018-1-87-93.

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Objective: The necessity to conduct the analysis of operating performance of elements and devices aimed at synthesis of automatic control systems managing different objects of train propulsive systems. Methods: Simulation modeling and computer simulation was applied. Results: An illustration of transient simulation of a nonlinear automatic control system in a flowchart of the train propulsive system was provided. Practical importance: It was shown, that computer simulation makes it possible to simulate control system’s behavior in different modes, and, consequently, provide the elaboration of balanced solutions in situations which are too complex for a simple cause-and-effect assessment of alternatives.
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Mei, Hong. "Control of Automobile's Automatic Parking." Advanced Materials Research 339 (September 2011): 28–31. http://dx.doi.org/10.4028/www.scientific.net/amr.339.28.

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An automatic parking controller is proposed. Fuzzy control is taken to simulate the action of experienced driver as an alternative to conventional methods. The angle between the midline of the car and ideal path and the distance between the midpoint of the car and the ideal path are taken as the inputs of the fuzzy controller. The angle of the steering wheel is taken as the output of the fuzzy controller. A set of fuzzy logic rules are build for reasoning. With sensors installed in the car to replace people’s eyes and computer to replace people’s brain, the automatic parking system is more precise and quicker than human’s parking. At last, simulation is made and proved the validity of the proposed method.
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Dissertations / Theses on the topic "Automatic control Computer simulation"

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Cruz, Eva Brunilda. "Simulation of computer control strategies for column flotation." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/46104.

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System identification techniques were applied to obtain mathematical expressions relating column flotation operating parameters. The empirical data were derived by making individual step changes in tailings rate, wash water rate, feed rate, frother addition and air rates, while measuring the pulp level and air holdup responses. The dynamic behavior of the flotation column is also analyzed for the conditions at which the tests were perfonned. After converting these mathematical equations into continuous and discrete transfer function matrices, several control algorithms were simulated on this column flotation empirical representation. Suggestions are provided to deal with the complexities of the process when designing a control scheme.
Master of Science
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Farley, Mark Harrison. "Predicting machining accuracy and duration of an NC mill by computer simulation." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/16499.

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Panesar, Kiran S. "Buffer management, adaptive flow control, and automatic incremental state saving in time warp systems." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/8234.

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Lew, Alfie Katat 1960. "Astrometric telescope simulator for the design and development of telescope teleoperation." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276844.

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A real-time discrete-event simulation model is built to emulate the functional operations of the Thaw telescope of the Allegheny Observatory and its attached scientific instrument. The OASIS software system is used to communicate with the simulation model. This simulation model, written in Ada, consists of three major parts. The Command Receiver and the Data Transmitter are software written to service the incoming telecommands and outgoing telemetry, the Command Processor is the actual simulator itself consisting of a Command Retriever, a Scanner, a Parser, a Command Interpreter, and the actual Thaw telescope simulation. The motivation for our simulation model and discussion of design issues are presented in chapters 1 and 2. The details of the model are documented in chapters 3, 4, and 5. The final two chapters include examples, questions, thoughts for future work, and conclusions.
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Zarei, Behrouz. "Performance analysis of automatic lookahead generation in parallel discrete event simulation using control flow graphs." Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274230.

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Lacroix, René. "A framework for the design of simulation-based greenhouse control." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41652.

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The main objectives were: (1) to develop tools to aid in the design of enclosed agro-ecosystems, and (2) to use these tools to develop a prototype simulation-based control system. Three tools were developed: (1) a conceptual framework, (2) a (simulated) greenhouse system and (3) a simulation approach within OS/2.
Part of the conceptual framework was dedicated to "conscious control", defined as a form of control practised by an entity that uses models of itself in its decision-making processes. The greenhouse system was composed of six modules (a simulation manager, a weather generator, a greenhouse model, a crop model, a Pavlovian controller and a cognitive controller), which were implemented under OS/2 as separate processes.
The greenhouse system was used to develop a prototype simulation-based controller. Primarily, the role of the controller was to determine temperature setpoints that would minimize the heating load. The simulation model used by the controller was an artificial neural network. The controller adapted temperature setpoints to anticipated meteorological conditions and reduced greenhouse energy consumption, in comparison with a more traditional controller.
Generally, the results showed the feasibility and illustrated some of the advantages of using simulation-based control. The research resulted in the definition of elements that will allow the creation of a methodological framework for the design of simulation-based control and, eventually, a theory of conscious control.
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Lewis, W. Ivan. "DACS: an interactive computer program to aid in the design and analysis of linear control systems." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/76039.

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DACS is an interactive computer program for the IBM-PC that aids in the design and analysis of linear control systems. Written in compiled basic, DACS includes Root Locus, Bode plots, Nyquist diagrams, Nichols charts, system simulation, and calculates the system time response in closed-form. The state-space description is used in the simulation and time response segments while the system transfer function is used in the root locus and frequency response segments. Calculated data may be displayed in either graphical or tabular form. Graphics features of DACS include automatic-scaling, zooming, graph coordinates derived from cursor location, graphics screen dumps to disk or printer, and redisplaying of disk files. DACS is menu driven and the majority of input/output is accomplished through the function keys. All system models and data may be saved on and recalled from disk. Help screens, three levels of sound, color, and session archiving are also provided. DACS provides a wide variety of linear control system analysis tools for the engineering desktop.
Master of Science
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Kmiecik, Chris G. "Effects of non-uniform windowing in a Rician-fading channel and simulation of adaptive automatic repeat request protocols." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA236940.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 1990.
Thesis Advisor(s): Ha, Tri T. Second Reader: Myers, Glen A. "June 1990." Description based on signature page. DTIC Identifier(s): Digital communications, frequent shift keyers, program listings, protocols. Author(s) subject terms: FFT windowwing, ARQ, fading, frequency shifts. Includes bibliographical references (p. 58). Also available online.
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Rudolph, Frederick M. "Human performance during automation : the interaction between automation, system information, and information display in a simulated flying task." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/36207.

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Lin, Wen-Hsing. "A comprehensive computer program for the control of first-order process with time delay." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1178132732.

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Books on the topic "Automatic control Computer simulation"

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Eyman, Earl D. Modeling, simulation, andcontrol. St. Paul, MN: West Pub. Co., 1988.

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Sunan, Huang. Applied Predictive Control. London: Springer London, 2002.

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International Symposium on Instrumentation and Control Technology (6th 2006 Beijing, China). Sensors, automatic measurement, control, and computer simulation: 13-15 October, 2006, Beijing, China. Edited by Fang Jiancheng, Wang Zhongyu, Beijing hang kong hang tian da xue., Guo jia zi ran ke xue ji jin wei yuan hui (China), and Society of Photo-optical Instrumentation Engineers. Bellingham, Wash: SPIE, 2006.

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Cacciabue, Pietro Carlo. Modelling and Simulation of Human Behaviour in System Control. London: Springer London, 1998.

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F, Page G., Gomm J. B, and Williams D, eds. Application of neural networks to modelling and control. London: Chapman & Hall, 1993.

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Cacciabue, Pietro C. Modelling and simulation of human behaviour in system control. Berlin: Springer, 1998.

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P, Banks Stephen. Control systems engineering: Modelling and simulation, control theory, and microprocessor implementation. Englewood Cliffs, N.J: Prentice-Hall International, 1986.

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Hydrometallurgical Meeting (35th 2005 Calgary, Alberta). Computational analysis in hydrometallurgy: 35th Annual Hydrometallurgy Meeting : proceedings of the international symposium on computational analysis of hydrometallurgy, August 21-24, 2005, Calgary, Alberta, Canada. Edited by Dixon Dave G, Dry Mike J, Metallurgical Society of CIM, and Conference of Metallurgists (44th : 2005 : Calgary, Alberta). Montréal: Canadian Institute of Mining, Metalluirgy and Petroleum, 2005.

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Modelling in mechanical engineering and mechatronics: Towards autonomous intelligent software models. London: Springer, 2007.

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Kieffer, Arthur E. Automatic control study of the icing research tunnel refrigeration system. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1991.

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Book chapters on the topic "Automatic control Computer simulation"

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Niewiadomska-Szynkiewicz, Ewa, and Krzysztof Malinowski. "Computer Simulation in Analysis and Design of Control Systems." In Automatic Control, Robotics, and Information Processing, 291–326. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48587-0_10.

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Kurbanov, Vugar G., Andrey E. Gorodetskiy, and I. L. Tarasova. "Computer Simulation of Automatic Control System Ciliated Propulsion." In Smart Electromechanical Systems: The Central Nervous System, 249–59. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53327-8_18.

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Yan, Ru, and Chun-ni Zheng. "Design of Simulation Teaching System of Automatic Control System Course Based on MATLAB." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 395–404. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84383-0_34.

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Thalmann, Nadia Magnenat, and Daniel Thalmann. "Automatic Motion Control." In Computer Animation, 175–88. Tokyo: Springer Japan, 1990. http://dx.doi.org/10.1007/978-4-431-68105-2_12.

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Weik, Martin H. "automatic gain control." In Computer Science and Communications Dictionary, 84. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1103.

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Weik, Martin H. "automatic process control." In Computer Science and Communications Dictionary, 86. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1125.

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Weik, Martin H. "automatic program control." In Computer Science and Communications Dictionary, 86. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1126.

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Weik, Martin H. "automatic toning control." In Computer Science and Communications Dictionary, 89. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1159.

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Weik, Martin H. "fast automatic gain control." In Computer Science and Communications Dictionary, 573. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6805.

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Weik, Martin H. "instantaneous automatic gain control." In Computer Science and Communications Dictionary, 794. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_9152.

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Conference papers on the topic "Automatic control Computer simulation"

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Bengsch, Helmut. "Computer Simulation of Automatic Climate Control Functions in Cars." In SAE International Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1986. http://dx.doi.org/10.4271/860584.

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Pedrosa, A., R. J. Simoes, C. A. Teixeira, M. Pastrana-Chalco, and W. C. A. Pereira. "Exploring Tissue Characterization by Temperature-Dependent Changes on Ultrasound Backscattered Energy, a Computer Simulation." In 2018 13th APCA International Conference on Automatic Control and Soft Computing (CONTROLO). IEEE, 2018. http://dx.doi.org/10.1109/controlo.2018.8514539.

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Hull, J. S. "A computer based network simulation of an automatic radio control system." In IEE Colloquium on Frequency Selection and Management Techniques for HF Communications. IEE, 1996. http://dx.doi.org/10.1049/ic:19960138.

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Del Vigo, Lucas, Roberto Peyton, Ulises Bussi, and Damian E. Oliva. "Computer-Aided Design and Simulation of a Robotic Manipulator for Educational Purposes." In 2018 Argentine Conference on Automatic Control (AADECA). IEEE, 2018. http://dx.doi.org/10.23919/aadeca.2018.8577386.

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Hu, Qin, and Xing Xu. "Study on automatic testing network based on LXI." In Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, edited by Jiancheng Fang and Zhongyu Wang. SPIE, 2006. http://dx.doi.org/10.1117/12.717971.

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Nasreldin M.A., Mohamed. "Design and Simulation of a Compensator for Automatic-Optical Leveling Instrument." In 2018 International Conference on Computer, Control, Electrical, and Electronics Engineering (ICCCEEE). IEEE, 2018. http://dx.doi.org/10.1109/iccceee.2018.8515894.

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Weng, Yifang, Zhengang Duan, Xiaoqin Lian, Xiaoli Zhang, and Wenying Yang. "Application of configuration software WinCC in logistics automatic control system." In Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, edited by Jiancheng Fang and Zhongyu Wang. SPIE, 2006. http://dx.doi.org/10.1117/12.717998.

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Zhang, Cheng, Pingbo Tang, Alper Yilmaz, Nancy Cooke, Verica Buchanan, Alan Chasey, Ronald Laurids Boring, Shawn W. St. Germain, Timothy Vaughn, and Samuel Jones. "Automatic Crane-Related Workflow Control for Nuclear Plant Outages through Computer Vision and Simulation." In 33th International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2016. http://dx.doi.org/10.22260/isarc2016/0107.

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Wang, Guohua, Xiaofeng Meng, and Ruixian Zhao. "TPS verification with UUT simulation." In Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, edited by Jiancheng Fang and Zhongyu Wang. SPIE, 2006. http://dx.doi.org/10.1117/12.718271.

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Chen, Siyuan. "The Analysis and Simulation for the Guidance Differential Control System and Significance for Automatic Control." In 2016 5th International Conference on Advanced Materials and Computer Science (ICAMCS 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icamcs-16.2016.101.

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Reports on the topic "Automatic control Computer simulation"

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Kettering, B., and P. Van Arsdall. Integrated computer control system startup simulation. Office of Scientific and Technical Information (OSTI), February 1998. http://dx.doi.org/10.2172/8307.

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Theil, E. Simulation of automatic control of MFTF-B neutral beams. Office of Scientific and Technical Information (OSTI), March 1985. http://dx.doi.org/10.2172/5696806.

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Kettering, B., and P. Van Arsdall. Integrated computer control system status monitor simulation. Office of Scientific and Technical Information (OSTI), September 1998. http://dx.doi.org/10.2172/8308.

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Van Arsdall, P., and C. E. Annese. Integrated computer control system countdown status messages simulation. Office of Scientific and Technical Information (OSTI), October 1998. http://dx.doi.org/10.2172/8047.

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Middlebrooks, Sam E., John P. Jones, and Patrick H. Henry. The Compass Paradigm for the Systematic Evaluation of U.S. Army Command and Control Systems Using Neural Network and Discrete Event Computer Simulation. Fort Belvoir, VA: Defense Technical Information Center, November 2005. http://dx.doi.org/10.21236/ada450646.

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Bobashev, Georgiy, John Holloway, Eric Solano, and Boris Gutkin. A Control Theory Model of Smoking. RTI Press, June 2017. http://dx.doi.org/10.3768/rtipress.2017.op.0040.1706.

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We present a heuristic control theory model that describes smoking under restricted and unrestricted access to cigarettes. The model is based on the allostasis theory and uses a formal representation of a multiscale opponent process. The model simulates smoking behavior of an individual and produces both short-term (“loading up” after not smoking for a while) and long-term smoking patterns (e.g., gradual transition from a few cigarettes to one pack a day). By introducing a formal representation of withdrawal- and craving-like processes, the model produces gradual increases over time in withdrawal- and craving-like signals associated with abstinence and shows that after 3 months of abstinence, craving disappears. The model was programmed as a computer application allowing users to select simulation scenarios. The application links images of brain regions that are activated during the binge/intoxication, withdrawal, or craving with corresponding simulated states. The model was calibrated to represent smoking patterns described in peer-reviewed literature; however, it is generic enough to be adapted to other drugs, including cocaine and opioids. Although the model does not mechanistically describe specific neurobiological processes, it can be useful in prevention and treatment practices as an illustration of drug-using behaviors and expected dynamics of withdrawal and craving during abstinence.
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7

Modlo, Yevhenii O., Serhiy O. Semerikov, Ruslan P. Shajda, Stanislav T. Tolmachev, and Oksana M. Markova. Methods of using mobile Internet devices in the formation of the general professional component of bachelor in electromechanics competency in modeling of technical objects. [б. в.], July 2020. http://dx.doi.org/10.31812/123456789/3878.

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The article describes the components of methods of using mobile Internet devices in the formation of the general professional component of bachelor in electromechanics competency in modeling of technical objects: using various methods of representing models; solving professional problems using ICT; competence in electric machines and critical thinking. On the content of learning academic disciplines “Higher mathematics”, “Automatic control theory”, “Modeling of electromechanical systems”, “Electrical machines” features of use are disclosed for Scilab, SageCell, Google Sheets, Xcos on Cloud in the formation of the general professional component of bachelor in electromechanics competency in modeling of technical objects. It is concluded that it is advisable to use the following software for mobile Internet devices: a cloud-based spreadsheets as modeling tools (including neural networks), a visual modeling systems as a means of structural modeling of technical objects; a mobile computer mathematical system used at all stages of modeling; a mobile communication tools for organizing joint modeling activities.
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Tarko, Andrew P., Mario A. Romero, Vamsi Krishna Bandaru, and Cristhian Lizarazo. TScan–Stationary LiDAR for Traffic and Safety Applications: Vehicle Interpretation and Tracking. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317402.

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To improve traffic performance and safety, the ability to measure traffic accurately and effectively, including motorists and other vulnerable road users, at road intersections is needed. A past study conducted by the Center for Road Safety has demonstrated that it is feasible to detect and track various types of road users using a LiDAR-based system called TScan. This project aimed to progress towards a real-world implementation of TScan by building two trailer-based prototypes with full end-user documentation. The previously developed detection and tracking algorithms have been modified and converted from the research code to its implementational version written in the C++ programming language. Two trailer-based TScan units have been built. The design of the prototype was iterated multiple times to account for component placement, ease of maintenance, etc. The expansion of the TScan system from a one single-sensor unit to multiple units with multiple LiDAR sensors necessitated transforming all the measurements into a common spatial and temporal reference frame. Engineering applications for performing traffic counts, analyzing speeds at intersections, and visualizing pedestrian presence data were developed. The limitations of the existing SSAM for traffic conflicts analysis with computer simulation prompted the research team to develop and implement their own traffic conflicts detection and analysis technique that is applicable to real-world data. Efficient use of the development system requires proper training of its end users. An INDOT-CRS collaborative process was developed and its execution planned to gradually transfer the two TScan prototypes to INDOT’s full control. This period will be also an opportunity for collecting feedback from the end user and making limited modifications to the system and documentation as needed.
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9

Galili, Naftali, Roger P. Rohrbach, Itzhak Shmulevich, Yoram Fuchs, and Giora Zauberman. Non-Destructive Quality Sensing of High-Value Agricultural Commodities Through Response Analysis. United States Department of Agriculture, October 1994. http://dx.doi.org/10.32747/1994.7570549.bard.

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The objectives of this project were to develop nondestructive methods for detection of internal properties and firmness of fruits and vegetables. One method was based on a soft piezoelectric film transducer developed in the Technion, for analysis of fruit response to low-energy excitation. The second method was a dot-matrix piezoelectric transducer of North Carolina State University, developed for contact-pressure analysis of fruit during impact. Two research teams, one in Israel and the other in North Carolina, coordinated their research effort according to the specific objectives of the project, to develop and apply the two complementary methods for quality control of agricultural commodities. In Israel: An improved firmness testing system was developed and tested with tropical fruits. The new system included an instrumented fruit-bed of three flexible piezoelectric sensors and miniature electromagnetic hammers, which served as fruit support and low-energy excitation device, respectively. Resonant frequencies were detected for determination of firmness index. Two new acoustic parameters were developed for evaluation of fruit firmness and maturity: a dumping-ratio and a centeroid of the frequency response. Experiments were performed with avocado and mango fruits. The internal damping ratio, which may indicate fruit ripeness, increased monotonically with time, while resonant frequencies and firmness indices decreased with time. Fruit samples were tested daily by destructive penetration test. A fairy high correlation was found in tropical fruits between the penetration force and the new acoustic parameters; a lower correlation was found between this parameter and the conventional firmness index. Improved table-top firmness testing units, Firmalon, with data-logging system and on-line data analysis capacity have been built. The new device was used for the full-scale experiments in the next two years, ahead of the original program and BARD timetable. Close cooperation was initiated with local industry for development of both off-line and on-line sorting and quality control of more agricultural commodities. Firmalon units were produced and operated in major packaging houses in Israel, Belgium and Washington State, on mango and avocado, apples, pears, tomatoes, melons and some other fruits, to gain field experience with the new method. The accumulated experimental data from all these activities is still analyzed, to improve firmness sorting criteria and shelf-life predicting curves for the different fruits. The test program in commercial CA storage facilities in Washington State included seven apple varieties: Fuji, Braeburn, Gala, Granny Smith, Jonagold, Red Delicious, Golden Delicious, and D'Anjou pear variety. FI master-curves could be developed for the Braeburn, Gala, Granny Smith and Jonagold apples. These fruits showed a steady ripening process during the test period. Yet, more work should be conducted to reduce scattering of the data and to determine the confidence limits of the method. Nearly constant FI in Red Delicious and the fluctuations of FI in the Fuji apples should be re-examined. Three sets of experiment were performed with Flandria tomatoes. Despite the complex structure of the tomatoes, the acoustic method could be used for firmness evaluation and to follow the ripening evolution with time. Close agreement was achieved between the auction expert evaluation and that of the nondestructive acoustic test, where firmness index of 4.0 and more indicated grade-A tomatoes. More work is performed to refine the sorting algorithm and to develop a general ripening scale for automatic grading of tomatoes for the fresh fruit market. Galia melons were tested in Israel, in simulated export conditions. It was concluded that the Firmalon is capable of detecting the ripening of melons nondestructively, and sorted out the defective fruits from the export shipment. The cooperation with local industry resulted in development of automatic on-line prototype of the acoustic sensor, that may be incorporated with the export quality control system for melons. More interesting is the development of the remote firmness sensing method for sealed CA cool-rooms, where most of the full-year fruit yield in stored for off-season consumption. Hundreds of ripening monitor systems have been installed in major fruit storage facilities, and being evaluated now by the consumers. If successful, the new method may cause a major change in long-term fruit storage technology. More uses of the acoustic test method have been considered, for monitoring fruit maturity and harvest time, testing fruit samples or each individual fruit when entering the storage facilities, packaging house and auction, and in the supermarket. This approach may result in a full line of equipment for nondestructive quality control of fruits and vegetables, from the orchard or the greenhouse, through the entire sorting, grading and storage process, up to the consumer table. The developed technology offers a tool to determine the maturity of the fruits nondestructively by monitoring their acoustic response to mechanical impulse on the tree. A special device was built and preliminary tested in mango fruit. More development is needed to develop a portable, hand operated sensing method for this purpose. In North Carolina: Analysis method based on an Auto-Regressive (AR) model was developed for detecting the first resonance of fruit from their response to mechanical impulse. The algorithm included a routine that detects the first resonant frequency from as many sensors as possible. Experiments on Red Delicious apples were performed and their firmness was determined. The AR method allowed the detection of the first resonance. The method could be fast enough to be utilized in a real time sorting machine. Yet, further study is needed to look for improvement of the search algorithm of the methods. An impact contact-pressure measurement system and Neural Network (NN) identification method were developed to investigate the relationships between surface pressure distributions on selected fruits and their respective internal textural qualities. A piezoelectric dot-matrix pressure transducer was developed for the purpose of acquiring time-sampled pressure profiles during impact. The acquired data was transferred into a personal computer and accurate visualization of animated data were presented. Preliminary test with 10 apples has been performed. Measurement were made by the contact-pressure transducer in two different positions. Complementary measurements were made on the same apples by using the Firmalon and Magness Taylor (MT) testers. Three-layer neural network was designed. 2/3 of the contact-pressure data were used as training input data and corresponding MT data as training target data. The remaining data were used as NN checking data. Six samples randomly chosen from the ten measured samples and their corresponding Firmalon values were used as the NN training and target data, respectively. The remaining four samples' data were input to the NN. The NN results consistent with the Firmness Tester values. So, if more training data would be obtained, the output should be more accurate. In addition, the Firmness Tester values do not consistent with MT firmness tester values. The NN method developed in this study appears to be a useful tool to emulate the MT Firmness test results without destroying the apple samples. To get more accurate estimation of MT firmness a much larger training data set is required. When the larger sensitive area of the pressure sensor being developed in this project becomes available, the entire contact 'shape' will provide additional information and the neural network results would be more accurate. It has been shown that the impact information can be utilized in the determination of internal quality factors of fruit. Until now,
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10

Floyd, Jason, and Daniel Madrzykowski. Analysis of a Near Miss in a Garden Apartment Fire – Georgia 2022. UL's Fire Safety Research Institute, October 2022. http://dx.doi.org/10.54206/102376/rsfd6862.

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On February 9, 2022, Cobb County Fire and Emergency Services responded to a fire in a ground floor unit in a garden apartment building. At arrival, the fire was a post-flashover fire in a bedroom. Initial fire control was attempted by an interior fire attack team which was unable to quickly locate the fire. Exterior suppression through the bedroom window was started prior to discovery of the fire by the interior team. Shortly after fire discovery by the internal team, a mayday was called. Four firefighters from the interior fire attack team received first and second degree burns. This report analyzes photographic, video, and written documentation from the incident to evaluate the timeline of the incident and to assess the fire conditions present. Computer modeling using the Fire Dynamics Simulator (FDS) was performed to provide further insight into the fire conditions and the impact of decisions and actions on the fire ground. Additionally, data from a full scale fire test of a similar fire in a similar structure was used to provide additional insight. Four FDS simulations were performed in support of the analysis. These included a simulation of the event as it unfolded and three simulations looking at the impact of alternate tactics which included: initial exterior attack prior to entry, the use of a smoke curtain to protect the building exit path, and interior only attack. FDS simulations provided insight on the heat present in the apartment during the fire and the impact of the interior and exterior suppression on conditions inside the apartment. Full scale test data of a similar fire showed similar behavior to the FDS predictions and gives credence to the FDS results. Results of the analysis suggest that injuries resulted from the length of time the interior attack team was present inside the apartment before actions were taken to reduce the severity of the fire. Six contributing factors were identified including size-up, communication and accountability, delayed exterior attack, lack of entry hall protection, the apartment layout and construction, thermal imager use, and mayday procedures and training. The last contributing factor was a positive contribution that helped avoid more serious injuries. Based on the contributing factors, five recommendations were made that include improved size-up, exterior fire control to prevent exterior spread, protection of exit pathways, basing fire ground tactics on known information, and recognizing when a change in tactics is needed.
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