Relevant bibliographies by topics / Variable stability simulator

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Variable stability simulator'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Variable stability simulator"

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Chandrasekaran, Kamali, Vijeesh Theningaledathil, and Archana Hebbar. "GROUND BASED VARIABLE STABILITY FLIGHT SIMULATOR." Aviation 25, no. 1 (2021): 22–34. http://dx.doi.org/10.3846/aviation.2021.13564.

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This paper discusses the development of a ground based variable stability flight simulator. The simulator is designed to meet the pilot training requirements on flying qualities. Such a requirement arose from a premier Flight-Testing School of the Indian Air Force. The simulator also provides a platform for researchers and aerospace students to understand aircraft dynamics, conduct studies on aircraft configuration design, flight mechanics, guidance & control and to evaluate autonomous navigation algorithms. The aircraft model is built using open source data. The simulator is strengthened
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Wang, De Shun, Gui Gang Han, Xin Long Zhang, and Bo Yang. "The Development of Multi-Functional Multi-Level Variable Voltage Variable Frequency Power Supply." Advanced Materials Research 1070-1072 (December 2014): 1263–67. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.1263.

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In order to adapt the grid test study of distributed generation system, a multifunctional variable voltage and variable frequency power supply is proposed. The power supply could work in four quadrant operations, so that energy generated by distributed systems could flow into grid. The fundamental voltage and harmonic voltage are controlled respectively: multiple feedback loop control scheme is applied in fundamental mode and effective value feedback control scheme is applied in harmonic mode. The DSP and FPGA platform are used for implementing the system control and the experimental results s
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Sheta, A. A., E. H. Ali, R. M. Fikry, T. A. Mahmoud, S. M. El-Araby, and M. I. Mahmoud. "Intelligent Control for Pressurizer System in Nuclear Power Plants." Journal of Physics: Conference Series 2128, no. 1 (2021): 012022. http://dx.doi.org/10.1088/1742-6596/2128/1/012022.

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Abstract Fine control of output power for nuclear power plants is the essential goal for safe operation. In this work, a Fuzzy analytical proportional-integral-derivative (FPID) controller with different configurations is designed to adjust and control the pressure of the PZR system. The stability analysis of the FPID controller with variable gains is established, and conditions for bounded-input bounded-output stability conditions (BIBO) are derived using the small gain theory. Two scenarios are applied for evaluating the dynamic response of applied controllers. In addition, performance indic
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Pan, Chun Ping, and Hsin Guan. "The Control of Hexapod Parallel Mechanism." Applied Mechanics and Materials 195-196 (August 2012): 1030–34. http://dx.doi.org/10.4028/www.scientific.net/amm.195-196.1030.

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In order to enhance the innervations fidelity of simulators, an adaptive nonlinear controller is developed, which guarantees parallel mechanisms closed loop system global asymptotical stability and the convergence of posture tracking error in Cartesian space. The problem of rapid tracking under the condition of the wide range, nonlinear and variable load is solved. After the adaptive nonlinear controller is actually applied to the hexapod parallel mechanisms of simulator, the dynamic-static capabilities of motion system is tested by amplitude-frequency response and posture precision. The exper
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Fekih, Afef, Saleh Mobayen, and Chih-Chiang Chen. "Adaptive Robust Fault-Tolerant Control Design for Wind Turbines Subject to Pitch Actuator Faults." Energies 14, no. 6 (2021): 1791. http://dx.doi.org/10.3390/en14061791.

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This paper proposes an adaptive fault tolerant control (FTC) design for a variable speed wind turbine (WT) operating in the high wind speeds region. It aims at mitigating pitch actuator faults and regulating the generator power to its rated value, thereby reducing the mechanical stress in the high wind speeds region. The proposed FTC design implements a sliding mode control (SMC) approach with an adaptation law that estimates the upper bounds of the uncertainties. System stability and uniform boundedness of the outputs was proven using the Lyapunov stability theory. The proposed approach was v
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Chadburn, Sarah E., Eleanor J. Burke, Angela V. Gallego-Sala, et al. "A new approach to simulate peat accumulation, degradation and stability in a global land surface scheme (JULES vn5.8_accumulate_soil) for northern and temperate peatlands." Geoscientific Model Development 15, no. 4 (2022): 1633–57. http://dx.doi.org/10.5194/gmd-15-1633-2022.

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Abstract. Peatlands have often been neglected in Earth system models (ESMs). Where they are included, they are usually represented via a separate, prescribed grid cell fraction that is given the physical characteristics of a peat (highly organic) soil. However, in reality soils vary on a spectrum between purely mineral soil (no organic material) and purely organic soil, typically with an organic layer of variable thickness overlying mineral soil below. They are also dynamic, with organic layer thickness and its properties changing over time. Neither the spectrum of soil types nor their dynamic
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Hasan, Ibtihal A., and Osama A. Awad. "AN OPTIMIZED FUZZY LOGIC CONTROLLER FOR WIRELESS NETWORK CONTROL SYSTEM USING PSO." Iraqi Journal of Information and Communication Technology 5, no. 1 (2022): 1–15. http://dx.doi.org/10.31987/ijict.5.1.180.

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Wireless Networked Control System (WNCS), has the advantage of control signal efficiency, reduced costs, robust, and more flexible over the wired Networked Control System (NCS). However, one of the most important challenges of WNCS is the variable and random time delay associated with the network that effect on the whole system stability. In this paper, a fuzzy PID controller is proposed to overcome this issue by controlling the DC motor over the Wi-Fi network. PSO algorithm is used to tune the controller, and TrueTime simulator is used to simulate the Wi-Fi network. Experimental results showe
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Alipour, M. Reza, F. Fani Saberi, and M. Kabganian. "Modelling, design and experimental implementation of non-linear attitude tracking with disturbance compensation using adaptive-sliding control based on quaternion algebra." Aeronautical Journal 122, no. 1247 (2017): 148–71. http://dx.doi.org/10.1017/aer.2017.122.

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ABSTRACTIn this paper, a non-linear tracking control algorithm is extended. The control objective of this research is to track a desired time-varying attitude of a satellite in the presence of inertia uncertainties and external disturbances, in order to be more suitable for implementation in a real-world application. In this investigation, the actuators are reaction wheels and the actuator dynamics are modelled in addition to the spacecraft dynamics. Thus, the control signal is DC motor voltage which is the most fundamental control variable and can be generated easily by a motor driver in prac
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Ma, Jie, Shule Li, and Xinyu Wang. "Condition Monitoring of Rolling Bearing Based on Multi-Order FRFT and SSA-DBN." Symmetry 14, no. 2 (2022): 320. http://dx.doi.org/10.3390/sym14020320.

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Owing to the symmetry of the rolling bearing structure and the rotating operation mode, the rolling bearing works in a complex environment. It is very easy to be submerged by noise and misdiagnosis. For the non-stationary signal in variable speed state, this paper presents a condition monitoring method based on deep belief network (DBN) optimized by multi-order fractional Fourier transform (FRFT) and sparrow search algorithm (SSA). Firstly, the fractional Fourier transform based on curve feature segmentation is used to filter the fault vibration signal and extract the fault feature frequency.
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Mohapatra, Bhabasis, Binod Kumar Sahu, Swagat Pati, et al. "Real-Time Validation of a Novel IAOA Technique-Based Offset Hysteresis Band Current Controller for Grid-Tied Photovoltaic System." Energies 15, no. 23 (2022): 8790. http://dx.doi.org/10.3390/en15238790.

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Renewable energy sources have power quality and stability issues despite having vast benefits when integrated with the utility grid. High currents and voltages are introduced during the disconnection or injection from or into the power system. Due to excessive inverter switching frequencies, distorted voltage waveforms and high distortions in the output current may be observed. Hence, advancing intelligent and robust optimization techniques along with advanced controllers is the need of the hour. Therefore, this article presents an improved arithmetic optimization algorithm and an offset hyste
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Dissertations / Theses on the topic "Variable stability simulator"

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Scamps, Alexander. "Development of a Variable Stability Flight Simulation Facility Re-engineering of Flight Control Loading and Motion Systems." Thesis, The University of Sydney, 2003. http://hdl.handle.net/2123/567.

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A Variable Stability Flight Simulator is being developed in the School of Aerospace, Mechanical and Mechatronic Engineering at the University of Sydney, Australia. The device is being developed both as a teaching tool for use in flight mechanics courses in the department and as a research tool. It is reasonable to state that learning is enhanced through the experience of concepts outside of the classroom environment. It is intended that the device will be integrated into the department�s teaching program in aircraft flight mechanics. Initial studies centred around a PC based flight simulat
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Scamps, Alexander. "Development of a Variable Stability Flight Simulation Facility Re-engineering of Flight Control Loading and Motion Systems." University of Sydney. Aerospace, Mechanical, 2003. http://hdl.handle.net/2123/567.

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A Variable Stability Flight Simulator is being developed in the School of Aerospace, Mechanical and Mechatronic Engineering at the University of Sydney, Australia. The device is being developed both as a teaching tool for use in flight mechanics courses in the department and as a research tool. It is reasonable to state that learning is enhanced through the experience of concepts outside of the classroom environment. It is intended that the device will be integrated into the department�s teaching program in aircraft flight mechanics. Initial studies centred around a PC based flight simulat
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Pettersson, Henrik Bengt. "Variable Stability Transfer Function Simulation." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/33503.

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Simulation, whether in-flight or ground-based, is an invaluable tool for testing and evaluating aircraft. Classically, a simulation model is specific to a single particular airframe, only able to model those flying characteristics. Vast information can be gained from a simulation that is able to model a wide range of aircraft, through a comparison of the performance of these aircraft. Such a variable stability simulation model was created based on 46 stability parame-ters, including natural frequencies, damping ratios, time constants, and gains. The simula-tion was obtained using transfer fun
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Germann, Kenneth Paul. "T-6A TEXAN II IN-FLIGHT SIMULATION AND VARIABLE STABILITY SYSTEM DESIGN." MSSTATE, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-12162009-091123/.

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In-flight variable stability aircraft and in-flight simulation are described. The uses of these vehicles and the associated requirements are described. Several forms of control architecture are identified for use in a T-6A in-flight simulator. A non-linear model of the T-6A Texan II is developed for use in MATLAB/SIMULINK®. This model is used to design a feedforward response-feedback controller, based on simplified dynamic inversion. This controller is shown to exercise precise control over the T-6A host aircraft dynamics. This architecture is then used to demonstrate simulation of the A-4 and
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Walther, Marc. "Variable-Density Flow Processes in Porous Media On Small, Medium and Regional Scales." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-153365.

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Nowadays society strongly depends on its available resources and the long term stability of the surrounding ecosystem. Numerical modelling has become a general standard for evaluating past, current or future system states for a large number of applications supporting decision makers in proper management. In order to ensure the correct representation of the investigated processes and results of a simulation, verification examples (benchmarks), that are based on observation data or analytical solutions, are utilized to evaluate the numerical modelling tool. In many parts of the world, groundwa
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Lardjane, Nicolas. "Étude théorique et numérique des écoulements cisaillés libres à masse volumique fortement variable." Phd thesis, Université d'Orléans, 2002. http://tel.archives-ouvertes.fr/tel-00006483.

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L'objet de ce travail concerne l'application de la méthode de simulation des grandes échelles au mélange de deux fluides à propriétés thermodynamiques différentes.<br />L'origine des erreurs numériques liées à la discrétisation des équations de Navier-Stokes ainsi que leur interaction avec un modèle sous-maille sont étudiées pour une turbulence homogène et isotrope en auto-amortissement. Un code de calcul à haut pouvoir de solution est alors développé pour la simulation de couches de mélange bi-espèces. La réduction de l'amplitude des ondes acoustiques initiales est assurée par l'utilisation d
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Chalayer, Rénald. "Méthodes de projection pour des écoulements à seuil, incompressibles et à densité variable." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC089.

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Cette thèse traite de l'utilisation de méthodes de projection pour la simulation de fluides à seuil, incompressibles et à densité variable. Elle se découpe en trois parties. La première partie est consacrée à la présentation du modèle mathématique, à la construction du schéma de semi-discrétisation en temps du modèle, ainsi qu'à l'analyse du schéma ainsi obtenu. Pour construire le schéma, nous avons d'une part adapté un schéma de type pas de temps fractionné existant pour les écoulements newtoniens au cas des écoulements à seuil et d'autre part, nous avons utilisé une formulation en terme de p
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Nouri, Ahmed Saïd. "Généralisation du régime glissant et de la commande à structure variable : applications aux actionneurs classiques et à muscles artificiels." Toulouse, INSA, 1994. http://www.theses.fr/1994ISAT0003.

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De nombreux systemes dynamiques (exemple: robot) presentent, en plus des perturbations exterieures, des non linearites et des perturbations parametriques, le recours a des commandes robustes est donc souhaitable. Une solution reside dans la commande a structure variable. En effet, lorsque le regime glissant est atteint, la dynamique du systeme boucle est plongee dans celle du systeme reduit et libre, d'ou l'independance vis a vis des perturbations exterieures et parametriques. L'auteur propose une generalisation de la surface de glissement permettant pour le systeme a commander d'une part, la
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Khan, Abdul Kareem. "Electrostaticanalisys the Ras active site." Doctoral thesis, Universitat Pompeu Fabra, 2009. http://hdl.handle.net/10803/7161.

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La preorganització electrostàtica del centre actiu s'ha postulat com el mecanisme genèric de l'acció dels enzims. Així, alguns residus "estratègics" es disposarien per catalitzar reaccions interaccionant en una forma més forta amb l'estat de transició, baixant d'aquesta manera el valor de l'energia dactivació &#61508;g cat. S'ha proposat que aquesta preorientació electrostática s'hauria de poder mostrar analitzant l'estabilitat electrostàtica de residus individuals en el centre actiu.<br/>Ras es una proteïna essencial de senyalització i actúa com un interruptor cel.lular. Les característiques
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Hung, Bing-Shian, and 洪秉賢. "Study of Motion Stability Simulation and Control of Variable Centroid Vehicle." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/45479941526753864648.

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碩士<br>大葉大學<br>機械與自動化工程學系<br>98<br>The objective for this study is to establish the simulation and evaluation mehtodlogy for Variable Centroid Vehicle (VCV) motion stability control system. VCV drive and handling and ride performance parameters such as longitudinal and lateral acceleration, yaw and roll rate and side slip angle can be calculated and compared under different dynamic simulation conditions. The roll rate was assessed with other appropriate control strategies and controllers’ settings to assure the VCV can be operating for safe and stable control condition. In this study, object-or
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Books on the topic "Variable stability simulator"

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Sobczyk, Eugeniusz Jacek. Uciążliwość eksploatacji złóż węgla kamiennego wynikająca z warunków geologicznych i górniczych. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN, 2022. http://dx.doi.org/10.33223/onermin/0222.

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Hard coal mining is characterised by features that pose numerous challenges to its current operations and cause strategic and operational problems in planning its development. The most important of these include the high capital intensity of mining investment projects and the dynamically changing environment in which the sector operates, while the long-term role of the sector is dependent on factors originating at both national and international level. At the same time, the conditions for coal mining are deteriorating, the resources more readily available in active mines are being exhausted, m
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Book chapters on the topic "Variable stability simulator"

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Hamel, Peter G. "Variable Stability Aircraft and In-Flight Simulators." In In-Flight Simulators and Fly-by-Wire/Light Demonstrators. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53997-3_5.

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Wei, Lisheng, Ming Jiang, and Minrui Fei. "Stability Analysis and Numerical Simulation for a Class of Multi-variable Networked Control Systems." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11842-5_61.

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Derouich, Mohamed. "Dengue Fever." In Handbook of Research on Systems Biology Applications in Medicine. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-076-9.ch044.

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Dengue fever is a re-emergent disease affecting more than 100 countries. Its incidence rate has increased fourfold since 1970 with nearly half the world’s population now at risk. In the chapter, a mathematical model with immunization is proposed to simulate the succession of 2 epidemics with variable human populations. Stability of the equilibrium points is carried out and simulation is given for different parameters settings.
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Kumar Behara, Ramesh, and Kavita Behara. "Simulation Analysis of DFIG Integrated Wind Turbine Control System." In Wind Turbines - Advances and Challenges in Design, Manufacture and Operation [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103721.

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Recently, scientists and academics are discovering progressive improvements in the arena of wind power technology economically and reliably, allowing them to produce electricity focusing on renewable energy resources. Wind turbines (WT) using the Doubly Fed Induction Generators (DFIGs) have attracted particular attention because of their advantages such as variable speed constant frequency (VSCF) operation, independent control capabilities for maximum power point tracking (MPPT), active and reactive power controls, and voltage control strategy at the point of common coupling (PCC). When such resources have to be integrated into the existing power system, the operation becomes more challenging, particularly in terms of stability, security, and reliability. A DFIG system with its control strategies is simulated on MATLAB software. This entails the rapid control prototype testing of grid-connected, variable speed DFIG wind turbines to investigate the WT’s steady-state and dynamic behavior under normal and disturbed wind conditions. To augment the transient stability of DFIG, the simulation results for the active and reactive power of conventional controllers are compared with the adaptive tracking, self-tuned feed-forward PI controller model for optimum performance. Conclusive outcomes manifest the superior robustness of the feed-forward PI controller in terms of rising time, settling time, and overshoot value.
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Savin, Sergei. "ZMP-Based Trajectory Generation for Bipedal Robots Using Quadratic Programming." In Advances in Computational Intelligence and Robotics. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9924-1.ch007.

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In this chapter, the problem of trajectory generation for bipedal walking robots is considered. A number of modern techniques are discussed, and their limitations are shown. The chapter focuses on zero-moment point methods for trajectory generation, where the desired trajectory of that point can be used to allow the robot to keep vertical stability if followed, and presents an instrument to calculate the desired trajectory for the center of mass for the robot. The chapter presents an algorithm based on quadratic programming, with an introduction of a slack variable to make the problem feasible and a change of variables to improve the numeric properties of the resulting optimization problem. Modern optimization tools allow one to solve such problems in real time, making it a viable solution for trajectory planning for the walking robots. The chapter shows a few results from the numerical simulation made for the algorithm, demonstrating its properties.
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Nadweh, Safwan Mhrez, and Ola Ahmad Khaddam. "Power Quality and Stability Analysis of Variable-Speed Drive Systems (VSDS)." In Handbook of Research on Smart Power System Operation and Control. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8030-0.ch017.

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This chapter introduces an analysis of power quality of variable-speed drive systems (VSDS). In this chapter, several issues have been discussed as VSDS in terms of cost and effectiveness, VSDS control loops (open loop, closed loop), and power quality in VSDS. Harmonics standards and harmonics in VSDS were discussed in this chapter in addition to highlighting the effects of harmonics on power factor, crest factor, and other power quality specifications. The solutions used to mitigate the harmonics in VSDS were discussed in detail. Finally, simulation of the conventional VSDS model and VSDS with one harmonic mitigation solution in order to clarify the usefulness of using this solution on power quality specifications were discussed.
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Theodoridis, Dimitris C., Yiannis S. Boutalis, and Manolis A. Christodoulou. "High Order Neuro-Fuzzy Dynamic Regulation of General Nonlinear Multi-Variable Systems." In Artificial Higher Order Neural Networks for Modeling and Simulation. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2175-6.ch007.

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The direct adaptive dynamic regulation of unknown nonlinear multi variable systems is investigated in this chapter in order to address the problem of controlling non-Brunovsky and non-square systems with control inputs less than the number of states. The proposed neuro-fuzzy model acts as a universal approximator. While with the careful selection of a Lyapunov-like function, the authors prove the stability of the proposed control algorithm. Weight updating laws derived from the Lyapunov analysis assure the boundedness of the closed-loop signals incorporating the well-known modified parameter hopping. In addition, the proposed algorithm shows robustness when facing modelling errors, and therefore, the state trajectories present uniform ultimate boundedness. The proposed dynamic controller proved to control those general nonlinear systems, which are difficult or even impossible to control with other algorithms. Simulation results on well-known benchmark problems demonstrate the applicability and effectiveness of the method.
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Gorbachev, Sergey, Boris Gusev, Victor Kuzin, Shengli Xie, and Dong Yue. "Leader-Follower Consensus of Fractional-Order Multi-Agent Systems Using Adaptive Fuzzy control." In Hybrid Methods of Big Data Analysis and Applications. Creosar Publishing, 2022. http://dx.doi.org/10.57118/creosar/978-1-915740-01-4_13.

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This part studies the leader-follower consensus (LFC) issue of fractional-order multi-agent systems (FOMASs) with nonlinear or linear function. Firstly, a fractional Lyapunov method is proposed to prove the stability of the FOMAS. Secondly, based on a sliding mode control method, when the follower dynamics is linear, a controller is devised to realize this uniform tracking question. Thirdly, when the follower has a nonlinear dynamic function satisfying the Lipschitz condition, it is verified that the devised controller is still reasonable. Fourthly, suppose that the dynamics of the followers are unknown, an adaptive fuzzy variable structure controller is devised to guarantee the consistency of the FOMAS. Finally, noting that the proposed conditions for stability and consensus are easy to verify, simulation calculations are written to expound the adaptability of control scheme.
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Boulkroune, Abdesselem, and Amina Boubellouta. "Fuzzy Control-Based Synchronization of Fractional-Order Chaotic Systems With Input Nonlinearities." In Advanced Synchronization Control and Bifurcation of Chaotic Fractional-Order Systems. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5418-9.ch009.

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This chapter addresses the fuzzy adaptive controller design for the generalized projective synchronization (GPS) of incommensurate fractional-order chaotic systems with actuator nonlinearities. The considered master-slave systems are with different fractional-orders, uncertain models, unknown bounded disturbances, and non-identical form. The suggested controller includes two keys terms, namely a fuzzy adaptive control and a fractional-order variable structure control. The fuzzy logic systems are exploited for approximating the system uncertainties. A Lyapunov approach is employed for determining the parameter adaptation laws and proving the stability of the closed-loop system. At last, simulation results are given to demonstrate the validity of the proposed synchronization approach.
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Prasad, Sumer Chand. "Double Fed Induction Generator Control for Wind Power Generation." In Applications of Artificial Intelligence in Electrical Engineering. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2718-4.ch009.

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Doubly-fed induction generator wind turbines are largely developed due to their variable speed feature. The response of wind turbines to grid disturbance is an important issue, especially since the rated power of the wind turbine is increased; therefore, it is important to study the effect of grid disturbances on the wind turbine. In the chapter, the characteristics of the doubly-fed induction generator during wind speed fluctuation are studied. MATLAB/Simulink software has been used to observe the characteristics of wind turbines during wind speed fluctuation. Simulation results of the doubly-fed induction generator wind turbine system show improved system stability during wind speed variation. Power electronics converters used in the DFIG system are the most sensitive parts of the variable speed wind turbines with regards to system disturbances. To protect from excessive current, the DFIG system is equipped with an over-current and DC voltage overload protection system that trips the system under abnormal conditions.
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Conference papers on the topic "Variable stability simulator"

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Scamps, Alexander, and P. Gibbens. "Development of a Variable Stability Flight Simulator as a Research/Education Tool." In AIAA Modeling and Simulation Technologies Conference and Exhibit. American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-5753.

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Mirza, Abdullah, Marinus M. van Paassen, T. J. Mulder, and Max Mulder. "Simulator Evaluation of a Medium-Cost Variable Stability System for a Business Jet." In AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-0370.

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Heidari, Mohammad Reza, and Terry Wayne Stone. "Development of a Thermal Stability Method for Phase Appearance and Disappearance Handling in Thermal Compositional Simulators." In SPE Reservoir Simulation Conference. SPE, 2021. http://dx.doi.org/10.2118/203912-ms.

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Abstract Thermal compositional simulators rely heavily on multicomponent, multiphase flash calculations for a variety of reasons, including reservoir and wellbore initialization, phase appearance and disappearance, and property calculation. In a mass variable formulation, an isenthalpic flash is used for phase split computation, phase saturation update, component mole fraction update in different phases, and temperatures. A natural variable formulation utilizes an isothermal flash mainly for phase appearance and disappearance as well as computation of component mole fractions in appearing phas
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Denoual, Thomas, Jean-François Petiot, Franck Mars, and Andras Kemeny. "Predicting the Subjective Evaluation of Drivers in a Driving Simulator During Loss of Adherence." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82511.

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This paper investigates the possibility of using objective indicators to predict the subjective evaluation of a driver in a simulator. Situations of loss of adherence (LOA) were controlled and modulated in intensity and duration on a static and on a dynamic simulator (with and without a motion base). Multiple regression analyses were performed using the subjective evaluation of participants as the dependent variable, and the objective physical variables of the interaction driver/vehicle as the independent variables. The results assigned the most contributive variables to the accuracy of the mo
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Lavretsky, Eugene. "Design, Analysis, and Flight Evaluation of a Primary Control System with Observer-Based Loop Transfer Recovery and Direct Adaptive Augmentation for The Calspan Variable Stability Simulator Learjet-25B Aircraft." In AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-1081.

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Ersal, Tulga, Mark Brudnak, Ashwin Salvi, Jeffrey L. Stein, Zoran Filipi, and Hosam K. Fathy. "Development of an Internet-Distributed Hardware-in-the-Loop Simulation Platform for an Automotive Application." In ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2709.

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This paper summarizes efforts to integrate, for the first time, two geographically-dispersed hardware-in-the-loop simulation setups over the Internet in an observer-free way. The two setups are the engine-in-the-loop simulation setup at the University of Michigan (UM) in Ann Arbor, MI, USA, and the driver-in-the-loop ride motion simulator at the US Army Tank-Automotive Research, Development and Engineering Center (TARDEC) in Warren, MI, USA. The goal of this integration is to increase the fidelity of experiments and to enable concurrent engineering. First, a model-based simulation of the setup
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Abdelhafiz, Mostafa Magdy, Joachim Magdy Oppelt, and Luiz Adolfo Hegele. "Thermal Analysis of the Wellbore System During Drilling Operations Using an Improved Drilling Simulator." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211721-ms.

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Abstract Prediction of the wellbore fluids and formation temperatures during well construction is an essential step for efficient drilling operation. This work presents the applications of an improved comprehensive drilling simulator for predicting the wellbore system temperature during the drilling process. A fully transient numerical model of the wellbore temperature is developed for drilling and geothermal production applications. The model describes the dynamic behaviour of the thermal state of the wellbore during circulation, drilling and static conditions. The developed model is successf
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Konopczynski, Michael Robert, and Anna Helene Petitt. "The Practical Design of a Carbon Storage Injection Well Completion Using In-Line Flow Control Devices to Maintain Injection Stability." In SPE Asia Pacific Oil & Gas Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210651-ms.

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Abstract While depleted oil and gas fields can provide important storage capacity for Carbon Capture and Storage (CCS), injection of carbon dioxide into extremely pressure depleted hydrocarbon fields can be problematic due to the phase change of CO2 that can cause flow instability and result in adverse physical phenomena, such as the cooling associated with the latent heat of vaporization and Joule-Thomson cooling which could damage the completion equipment, reduce the hydrostatic head of CO2 and make it difficult to inject carbon dioxide. Thus far, most completion solutions to this problem ha
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Pan, Huanquan, and Hamdi A. Tchelepi. "Compositional Flow Simulation Using Reduced-Variables and Stability-Analysis Bypassing." In SPE Reservoir Simulation Symposium. Society of Petroleum Engineers, 2011. http://dx.doi.org/10.2118/142189-ms.

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Ketelheun, Anja, Clemens Olbricht, Frederik Hahn, and Johannes Janicka. "Premixed Generated Manifolds for the Computation of Technical Combustion Systems." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59940.

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Large eddy simulations (LES) show a good prediction accuracy at a decent computational cost for the simulation of combustion processes in complex geometries. However, the large grids required make the direct solution of detailed reaction kinetics impracticable. Therefore, the chemical reactions can be tabulated in a pre-processing step using detailed chemistry with one-dimensional laminar steady flamelets. These flamelets can be either non-premixed or premixed and are stored based on controlling variables like mixture fraction and reaction progress parameter, for example. In this work, a progr
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Reports on the topic "Variable stability simulator"

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Financial Stability Report - Second Semester of 2020. Banco de la República de Colombia, 2021. http://dx.doi.org/10.32468/rept-estab-fin.sem2.eng-2020.

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The Colombian financial system has not suffered major structural disruptions during these months of deep economic contraction and has continued to carry out its basic functions as usual, thus facilitating the economy's response to extreme conditions. This is the result of the soundness of financial institutions at the beginning of the crisis, which was reflected in high liquidity and capital adequacy indicators as well as in the timely response of various authorities. Banco de la República lowered its policy interest rates 250 points to 1.75%, the lowest level since the creation of the new ind
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